diff --git a/firebase-vertexai/firebase-vertexai.gradle.kts b/firebase-vertexai/firebase-vertexai.gradle.kts
index 9bdabd0f0ce..018a41429d1 100644
--- a/firebase-vertexai/firebase-vertexai.gradle.kts
+++ b/firebase-vertexai/firebase-vertexai.gradle.kts
@@ -16,6 +16,9 @@
 
 @file:Suppress("UnstableApiUsage")
 
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+
 plugins {
   id("firebase-library")
   id("kotlin-android")
@@ -66,6 +69,21 @@ android {
   }
 }
 
+// Enable Kotlin "Explicit API Mode". This causes the Kotlin compiler to fail if any
+// classes, methods, or properties have implicit `public` visibility. This check helps
+// avoid  accidentally leaking elements into the public API, requiring that any public
+// element be explicitly declared as `public`.
+// https://github.com/Kotlin/KEEP/blob/master/proposals/explicit-api-mode.md
+// https://chao2zhang.medium.com/explicit-api-mode-for-kotlin-on-android-b8264fdd76d1
+tasks.withType<KotlinCompile>().all {
+  if (!name.contains("test", ignoreCase = true)) {
+    if (!kotlinOptions.freeCompilerArgs.contains("-Xexplicit-api=strict")) {
+      kotlinOptions.freeCompilerArgs += "-Xexplicit-api=strict"
+    }
+  }
+}
+
+
 dependencies {
   val ktorVersion = "2.3.2"
 
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/Chat.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/Chat.kt
index e44adea961a..59c507c47a0 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/Chat.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/Chat.kt
@@ -42,7 +42,10 @@ import kotlinx.coroutines.flow.onEach
  * @param model The model to use for the interaction
  * @property history The previous interactions with the model
  */
-class Chat(private val model: GenerativeModel, val history: MutableList<Content> = ArrayList()) {
+public class Chat(
+  private val model: GenerativeModel,
+  public val history: MutableList<Content> = ArrayList()
+) {
   private var lock = Semaphore(1)
 
   /**
@@ -53,7 +56,7 @@ class Chat(private val model: GenerativeModel, val history: MutableList<Content>
    * @throws InvalidStateException if the prompt is not coming from the 'user' role
    * @throws InvalidStateException if the [Chat] instance has an active request.
    */
-  suspend fun sendMessage(prompt: Content): GenerateContentResponse {
+  public suspend fun sendMessage(prompt: Content): GenerateContentResponse {
     prompt.assertComesFromUser()
     attemptLock()
     try {
@@ -72,7 +75,7 @@ class Chat(private val model: GenerativeModel, val history: MutableList<Content>
    * @param prompt The text to be converted into a single piece of [Content] to send to the model.
    * @throws InvalidStateException if the [Chat] instance has an active request.
    */
-  suspend fun sendMessage(prompt: String): GenerateContentResponse {
+  public suspend fun sendMessage(prompt: String): GenerateContentResponse {
     val content = content { text(prompt) }
     return sendMessage(content)
   }
@@ -83,7 +86,7 @@ class Chat(private val model: GenerativeModel, val history: MutableList<Content>
    * @param prompt The image to be converted into a single piece of [Content] to send to the model.
    * @throws InvalidStateException if the [Chat] instance has an active request.
    */
-  suspend fun sendMessage(prompt: Bitmap): GenerateContentResponse {
+  public suspend fun sendMessage(prompt: Bitmap): GenerateContentResponse {
     val content = content { image(prompt) }
     return sendMessage(content)
   }
@@ -96,7 +99,7 @@ class Chat(private val model: GenerativeModel, val history: MutableList<Content>
    * @throws InvalidStateException if the prompt is not coming from the 'user' role
    * @throws InvalidStateException if the [Chat] instance has an active request.
    */
-  fun sendMessageStream(prompt: Content): Flow<GenerateContentResponse> {
+  public fun sendMessageStream(prompt: Content): Flow<GenerateContentResponse> {
     prompt.assertComesFromUser()
     attemptLock()
 
@@ -149,7 +152,7 @@ class Chat(private val model: GenerativeModel, val history: MutableList<Content>
    * @return A [Flow] which will emit responses as they are returned from the model.
    * @throws InvalidStateException if the [Chat] instance has an active request.
    */
-  fun sendMessageStream(prompt: String): Flow<GenerateContentResponse> {
+  public fun sendMessageStream(prompt: String): Flow<GenerateContentResponse> {
     val content = content { text(prompt) }
     return sendMessageStream(content)
   }
@@ -161,7 +164,7 @@ class Chat(private val model: GenerativeModel, val history: MutableList<Content>
    * @return A [Flow] which will emit responses as they are returned from the model.
    * @throws InvalidStateException if the [Chat] instance has an active request.
    */
-  fun sendMessageStream(prompt: Bitmap): Flow<GenerateContentResponse> {
+  public fun sendMessageStream(prompt: Bitmap): Flow<GenerateContentResponse> {
     val content = content { image(prompt) }
     return sendMessageStream(content)
   }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/FirebaseVertexAI.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/FirebaseVertexAI.kt
index c19326a1682..145dd90b121 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/FirebaseVertexAI.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/FirebaseVertexAI.kt
@@ -31,7 +31,7 @@ import com.google.firebase.vertexai.type.Tool
 import com.google.firebase.vertexai.type.ToolConfig
 
 /** Entry point for all _Vertex AI for Firebase_ functionality. */
-class FirebaseVertexAI
+public class FirebaseVertexAI
 internal constructor(
   private val firebaseApp: FirebaseApp,
   private val location: String,
@@ -51,7 +51,7 @@ internal constructor(
    * @param systemInstruction contains a [Content] that directs the model to behave a certain way
    */
   @JvmOverloads
-  fun generativeModel(
+  public fun generativeModel(
     modelName: String,
     generationConfig: GenerationConfig? = null,
     safetySettings: List<SafetySetting>? = null,
@@ -77,13 +77,13 @@ internal constructor(
     )
   }
 
-  companion object {
+  public companion object {
     /** The [FirebaseVertexAI] instance for the default [FirebaseApp] */
     @JvmStatic
-    val instance: FirebaseVertexAI
+    public val instance: FirebaseVertexAI
       get() = getInstance(location = "us-central1")
 
-    @JvmStatic fun getInstance(app: FirebaseApp): FirebaseVertexAI = getInstance(app)
+    @JvmStatic public fun getInstance(app: FirebaseApp): FirebaseVertexAI = getInstance(app)
 
     /**
      * Returns the [FirebaseVertexAI] instance for the provided [FirebaseApp] and [location]
@@ -93,7 +93,7 @@ internal constructor(
      */
     @JvmStatic
     @JvmOverloads
-    fun getInstance(app: FirebaseApp = Firebase.app, location: String): FirebaseVertexAI {
+    public fun getInstance(app: FirebaseApp = Firebase.app, location: String): FirebaseVertexAI {
       val multiResourceComponent = app[FirebaseVertexAIMultiResourceComponent::class.java]
       return multiResourceComponent.get(location)
     }
@@ -101,11 +101,11 @@ internal constructor(
 }
 
 /** Returns the [FirebaseVertexAI] instance of the default [FirebaseApp]. */
-val Firebase.vertexAI: FirebaseVertexAI
+public val Firebase.vertexAI: FirebaseVertexAI
   get() = FirebaseVertexAI.instance
 
 /** Returns the [FirebaseVertexAI] instance of a given [FirebaseApp]. */
-fun Firebase.vertexAI(
+public fun Firebase.vertexAI(
   app: FirebaseApp = Firebase.app,
   location: String = "us-central1"
 ): FirebaseVertexAI = FirebaseVertexAI.getInstance(app, location)
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/GenerativeModel.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/GenerativeModel.kt
index 50769073fa5..3f3fc260c71 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/GenerativeModel.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/GenerativeModel.kt
@@ -50,7 +50,7 @@ import kotlinx.coroutines.tasks.await
 /**
  * A controller for communicating with the API of a given multimodal model (for example, Gemini).
  */
-class GenerativeModel
+public class GenerativeModel
 internal constructor(
   private val modelName: String,
   private val generationConfig: GenerationConfig? = null,
@@ -128,7 +128,7 @@ internal constructor(
    * @return A [GenerateContentResponse]. Function should be called within a suspend context to
    * properly manage concurrency.
    */
-  suspend fun generateContent(vararg prompt: Content): GenerateContentResponse =
+  public suspend fun generateContent(vararg prompt: Content): GenerateContentResponse =
     try {
       controller.generateContent(constructRequest(*prompt)).toPublic().validate()
     } catch (e: Throwable) {
@@ -141,7 +141,7 @@ internal constructor(
    * @param prompt [Content] to send to the model.
    * @return A [Flow] which will emit responses as they are returned from the model.
    */
-  fun generateContentStream(vararg prompt: Content): Flow<GenerateContentResponse> =
+  public fun generateContentStream(vararg prompt: Content): Flow<GenerateContentResponse> =
     controller
       .generateContentStream(constructRequest(*prompt))
       .catch { throw FirebaseVertexAIException.from(it) }
@@ -154,7 +154,7 @@ internal constructor(
    * @return A [GenerateContentResponse] after some delay. Function should be called within a
    * suspend context to properly manage concurrency.
    */
-  suspend fun generateContent(prompt: String): GenerateContentResponse =
+  public suspend fun generateContent(prompt: String): GenerateContentResponse =
     generateContent(content { text(prompt) })
 
   /**
@@ -163,7 +163,7 @@ internal constructor(
    * @param prompt The text to be converted into a single piece of [Content] to send to the model.
    * @return A [Flow] which will emit responses as they are returned from the model.
    */
-  fun generateContentStream(prompt: String): Flow<GenerateContentResponse> =
+  public fun generateContentStream(prompt: String): Flow<GenerateContentResponse> =
     generateContentStream(content { text(prompt) })
 
   /**
@@ -173,7 +173,7 @@ internal constructor(
    * @return A [GenerateContentResponse] after some delay. Function should be called within a
    * suspend context to properly manage concurrency.
    */
-  suspend fun generateContent(prompt: Bitmap): GenerateContentResponse =
+  public suspend fun generateContent(prompt: Bitmap): GenerateContentResponse =
     generateContent(content { image(prompt) })
 
   /**
@@ -182,11 +182,12 @@ internal constructor(
    * @param prompt The image to be converted into a single piece of [Content] to send to the model.
    * @return A [Flow] which will emit responses as they are returned from the model.
    */
-  fun generateContentStream(prompt: Bitmap): Flow<GenerateContentResponse> =
+  public fun generateContentStream(prompt: Bitmap): Flow<GenerateContentResponse> =
     generateContentStream(content { image(prompt) })
 
   /** Creates a [Chat] instance which internally tracks the ongoing conversation with the model */
-  fun startChat(history: List<Content> = emptyList()): Chat = Chat(this, history.toMutableList())
+  public fun startChat(history: List<Content> = emptyList()): Chat =
+    Chat(this, history.toMutableList())
 
   /**
    * Counts the amount of tokens in a prompt.
@@ -194,7 +195,7 @@ internal constructor(
    * @param prompt A group of [Content] to count tokens of.
    * @return A [CountTokensResponse] containing the amount of tokens in the prompt.
    */
-  suspend fun countTokens(vararg prompt: Content): CountTokensResponse {
+  public suspend fun countTokens(vararg prompt: Content): CountTokensResponse {
     try {
       return controller.countTokens(constructCountTokensRequest(*prompt)).toPublic()
     } catch (e: Throwable) {
@@ -208,7 +209,7 @@ internal constructor(
    * @param prompt The text to be converted to a single piece of [Content] to count the tokens of.
    * @return A [CountTokensResponse] containing the amount of tokens in the prompt.
    */
-  suspend fun countTokens(prompt: String): CountTokensResponse {
+  public suspend fun countTokens(prompt: String): CountTokensResponse {
     return countTokens(content { text(prompt) })
   }
 
@@ -218,7 +219,7 @@ internal constructor(
    * @param prompt The image to be converted to a single piece of [Content] to count the tokens of.
    * @return A [CountTokensResponse] containing the amount of tokens in the prompt.
    */
-  suspend fun countTokens(prompt: Bitmap): CountTokensResponse {
+  public suspend fun countTokens(prompt: Bitmap): CountTokensResponse {
     return countTokens(content { image(prompt) })
   }
 
@@ -247,7 +248,7 @@ internal constructor(
       ?.let { throw ResponseStoppedException(this) }
   }
 
-  companion object {
+  private companion object {
     private val TAG = GenerativeModel::class.java.simpleName
   }
 }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/common/shared/Types.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/common/shared/Types.kt
index b70603c5de0..f6c1bc22b88 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/common/shared/Types.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/common/shared/Types.kt
@@ -41,7 +41,7 @@ internal enum class HarmCategory {
   @SerialName("HARM_CATEGORY_DANGEROUS_CONTENT") DANGEROUS_CONTENT
 }
 
-typealias Base64 = String
+internal typealias Base64 = String
 
 @ExperimentalSerializationApi
 @Serializable
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/ChatFutures.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/ChatFutures.kt
index ee20e462be5..d6b1a4e5e22 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/ChatFutures.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/ChatFutures.kt
@@ -29,7 +29,7 @@ import org.reactivestreams.Publisher
  *
  * @see from
  */
-abstract class ChatFutures internal constructor() {
+public abstract class ChatFutures internal constructor() {
 
   /**
    * Generates a response from the backend with the provided [Content], and any previous ones
@@ -37,17 +37,17 @@ abstract class ChatFutures internal constructor() {
    *
    * @param prompt A [Content] to send to the model.
    */
-  abstract fun sendMessage(prompt: Content): ListenableFuture<GenerateContentResponse>
+  public abstract fun sendMessage(prompt: Content): ListenableFuture<GenerateContentResponse>
 
   /**
    * Generates a streaming response from the backend with the provided [Content].
    *
    * @param prompt A [Content] to send to the model.
    */
-  abstract fun sendMessageStream(prompt: Content): Publisher<GenerateContentResponse>
+  public abstract fun sendMessageStream(prompt: Content): Publisher<GenerateContentResponse>
 
   /** Returns the [Chat] instance that was used to create this instance */
-  abstract fun getChat(): Chat
+  public abstract fun getChat(): Chat
 
   private class FuturesImpl(private val chat: Chat) : ChatFutures() {
     override fun sendMessage(prompt: Content): ListenableFuture<GenerateContentResponse> =
@@ -59,9 +59,9 @@ abstract class ChatFutures internal constructor() {
     override fun getChat(): Chat = chat
   }
 
-  companion object {
+  public companion object {
 
     /** @return a [ChatFutures] created around the provided [Chat] */
-    @JvmStatic fun from(chat: Chat): ChatFutures = FuturesImpl(chat)
+    @JvmStatic public fun from(chat: Chat): ChatFutures = FuturesImpl(chat)
   }
 }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/GenerativeModelFutures.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/GenerativeModelFutures.kt
index 1144df72d1a..fe43e0b69a2 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/GenerativeModelFutures.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/java/GenerativeModelFutures.kt
@@ -31,41 +31,45 @@ import org.reactivestreams.Publisher
  *
  * @see from
  */
-abstract class GenerativeModelFutures internal constructor() {
+public abstract class GenerativeModelFutures internal constructor() {
 
   /**
    * Generates a response from the backend with the provided [Content].
    *
    * @param prompt A group of [Content] to send to the model.
    */
-  abstract fun generateContent(vararg prompt: Content): ListenableFuture<GenerateContentResponse>
+  public abstract fun generateContent(
+    vararg prompt: Content
+  ): ListenableFuture<GenerateContentResponse>
 
   /**
    * Generates a streaming response from the backend with the provided [Content].
    *
    * @param prompt A group of [Content] to send to the model.
    */
-  abstract fun generateContentStream(vararg prompt: Content): Publisher<GenerateContentResponse>
+  public abstract fun generateContentStream(
+    vararg prompt: Content
+  ): Publisher<GenerateContentResponse>
 
   /**
    * Counts the number of tokens used in a prompt.
    *
    * @param prompt A group of [Content] to count tokens of.
    */
-  abstract fun countTokens(vararg prompt: Content): ListenableFuture<CountTokensResponse>
+  public abstract fun countTokens(vararg prompt: Content): ListenableFuture<CountTokensResponse>
 
   /** Creates a chat instance which internally tracks the ongoing conversation with the model */
-  abstract fun startChat(): ChatFutures
+  public abstract fun startChat(): ChatFutures
 
   /**
    * Creates a chat instance which internally tracks the ongoing conversation with the model
    *
    * @param history an existing history of context to use as a starting point
    */
-  abstract fun startChat(history: List<Content>): ChatFutures
+  public abstract fun startChat(history: List<Content>): ChatFutures
 
   /** Returns the [GenerativeModel] instance that was used to create this object */
-  abstract fun getGenerativeModel(): GenerativeModel
+  public abstract fun getGenerativeModel(): GenerativeModel
 
   private class FuturesImpl(private val model: GenerativeModel) : GenerativeModelFutures() {
     override fun generateContent(
@@ -86,9 +90,9 @@ abstract class GenerativeModelFutures internal constructor() {
     override fun getGenerativeModel(): GenerativeModel = model
   }
 
-  companion object {
+  public companion object {
 
     /** @return a [GenerativeModelFutures] created around the provided [GenerativeModel] */
-    @JvmStatic fun from(model: GenerativeModel): GenerativeModelFutures = FuturesImpl(model)
+    @JvmStatic public fun from(model: GenerativeModel): GenerativeModelFutures = FuturesImpl(model)
   }
 }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Candidate.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Candidate.kt
index 5538c24e139..a5ac3d83716 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Candidate.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Candidate.kt
@@ -19,23 +19,23 @@ package com.google.firebase.vertexai.type
 import java.util.Calendar
 
 /** A response generated by the model. */
-class Candidate
+public class Candidate
 internal constructor(
-  val content: Content,
-  val safetyRatings: List<SafetyRating>,
-  val citationMetadata: CitationMetadata?,
-  val finishReason: FinishReason?
+  public val content: Content,
+  public val safetyRatings: List<SafetyRating>,
+  public val citationMetadata: CitationMetadata?,
+  public val finishReason: FinishReason?
 )
 
 /** Safety rating corresponding to a generated content. */
-class SafetyRating
+public class SafetyRating
 internal constructor(
-  val category: HarmCategory,
-  val probability: HarmProbability,
-  val probabilityScore: Float = 0f,
-  val blocked: Boolean? = null,
-  val severity: HarmSeverity? = null,
-  val severityScore: Float? = null
+  public val category: HarmCategory,
+  public val probability: HarmProbability,
+  public val probabilityScore: Float = 0f,
+  public val blocked: Boolean? = null,
+  public val severity: HarmSeverity? = null,
+  public val severityScore: Float? = null
 )
 
 /**
@@ -44,7 +44,7 @@ internal constructor(
  * @property citations A list of individual cited sources and the parts of the content to which they
  * apply.
  */
-class CitationMetadata internal constructor(val citations: List<Citation>)
+public class CitationMetadata internal constructor(public val citations: List<Citation>)
 
 /**
  * Provides citation information for sourcing of content provided by the model between a given
@@ -59,18 +59,18 @@ class CitationMetadata internal constructor(val citations: List<Citation>)
  * @property license The license the cited source work is distributed under, if specified.
  * @property publicationDate Publication date of the attribution, if available.
  */
-class Citation
+public class Citation
 internal constructor(
-  val title: String? = null,
-  val startIndex: Int = 0,
-  val endIndex: Int,
-  val uri: String? = null,
-  val license: String? = null,
-  val publicationDate: Calendar? = null
+  public val title: String? = null,
+  public val startIndex: Int = 0,
+  public val endIndex: Int,
+  public val uri: String? = null,
+  public val license: String? = null,
+  public val publicationDate: Calendar? = null
 )
 
 /** The reason for content finishing. */
-enum class FinishReason {
+public enum class FinishReason {
   /** A new and not yet supported value. */
   UNKNOWN,
 
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Content.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Content.kt
index 89f07cbb20a..74bcf8e5f7d 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Content.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Content.kt
@@ -26,46 +26,51 @@ import android.graphics.Bitmap
  *
  * @see content
  */
-class Content @JvmOverloads constructor(val role: String? = "user", val parts: List<Part>) {
+public class Content
+@JvmOverloads
+constructor(public val role: String? = "user", public val parts: List<Part>) {
 
   /** Builder class to facilitate constructing complex [Content] objects. */
-  class Builder {
+  public class Builder {
 
     /** The producer of the content. By default, it's "user". */
-    var role: String? = "user"
+    public var role: String? = "user"
 
     /**
      * Mutable list of [Part] comprising a single [Content].
      *
      * Prefer using the provided helper methods over adding elements to the list directly.
      */
-    var parts: MutableList<Part> = arrayListOf()
+    public var parts: MutableList<Part> = arrayListOf()
 
     /** Adds a new [Part] to [parts]. */
-    @JvmName("addPart") fun <T : Part> part(data: T) = apply { parts.add(data) }
+    @JvmName("addPart")
+    public fun <T : Part> part(data: T): Content.Builder = apply { parts.add(data) }
 
     /** Wraps the provided text inside a [TextPart] and adds it to [parts] list. */
-    @JvmName("addText") fun text(text: String) = part(TextPart(text))
+    @JvmName("addText") public fun text(text: String): Content.Builder = part(TextPart(text))
 
     /**
      * Wraps the provided [bytes] and [mimeType] inside a [InlineDataPart] and adds it to the
      * [parts] list.
      */
     @JvmName("addInlineData")
-    fun inlineData(mimeType: String, bytes: ByteArray) = part(InlineDataPart(mimeType, bytes))
+    public fun inlineData(mimeType: String, bytes: ByteArray): Content.Builder =
+      part(InlineDataPart(mimeType, bytes))
 
     /** Wraps the provided [image] inside an [ImagePart] and adds it to the [parts] list. */
-    @JvmName("addImage") fun image(image: Bitmap) = part(ImagePart(image))
+    @JvmName("addImage") public fun image(image: Bitmap): Content.Builder = part(ImagePart(image))
 
     /**
      * Wraps the provided Google Cloud Storage for Firebase [uri] and [mimeType] inside a
      * [FileDataPart] and adds it to the [parts] list.
      */
     @JvmName("addFileData")
-    fun fileData(uri: String, mimeType: String) = part(FileDataPart(uri, mimeType))
+    public fun fileData(uri: String, mimeType: String): Content.Builder =
+      part(FileDataPart(uri, mimeType))
 
     /** Returns a new [Content] using the defined [role] and [parts]. */
-    fun build(): Content = Content(role, parts)
+    public fun build(): Content = Content(role, parts)
   }
 }
 
@@ -81,7 +86,7 @@ class Content @JvmOverloads constructor(val role: String? = "user", val parts: L
  * )
  * ```
  */
-fun content(role: String? = "user", init: Content.Builder.() -> Unit): Content {
+public fun content(role: String? = "user", init: Content.Builder.() -> Unit): Content {
   val builder = Content.Builder()
   builder.role = role
   builder.init()
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/CountTokensResponse.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/CountTokensResponse.kt
index ac4ee804715..cb8b17009b1 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/CountTokensResponse.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/CountTokensResponse.kt
@@ -23,8 +23,11 @@ package com.google.firebase.vertexai.type
  * @property totalBillableCharacters A count of the characters that are billable in the input, if
  * available.
  */
-class CountTokensResponse(val totalTokens: Int, val totalBillableCharacters: Int? = null) {
-  operator fun component1() = totalTokens
+public class CountTokensResponse(
+  public val totalTokens: Int,
+  public val totalBillableCharacters: Int? = null
+) {
+  public operator fun component1(): Int = totalTokens
 
-  operator fun component2() = totalBillableCharacters
+  public operator fun component2(): Int? = totalBillableCharacters
 }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Exceptions.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Exceptions.kt
index f841da4432a..cc78e8a9168 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Exceptions.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Exceptions.kt
@@ -22,10 +22,10 @@ import com.google.firebase.vertexai.internal.util.toPublic
 import kotlinx.coroutines.TimeoutCancellationException
 
 /** Parent class for any errors that occur from the [FirebaseVertexAI] SDK. */
-sealed class FirebaseVertexAIException(message: String, cause: Throwable? = null) :
+public sealed class FirebaseVertexAIException(message: String, cause: Throwable? = null) :
   RuntimeException(message, cause) {
 
-  companion object {
+  internal companion object {
 
     /**
      * Converts a [Throwable] to a [FirebaseVertexAIException].
@@ -33,7 +33,7 @@ sealed class FirebaseVertexAIException(message: String, cause: Throwable? = null
      * Will populate default messages as expected, and propagate the provided [cause] through the
      * resulting exception.
      */
-    fun from(cause: Throwable): FirebaseVertexAIException =
+    internal fun from(cause: Throwable): FirebaseVertexAIException =
       when (cause) {
         is FirebaseVertexAIException -> cause
         is FirebaseCommonAIException ->
@@ -68,15 +68,15 @@ sealed class FirebaseVertexAIException(message: String, cause: Throwable? = null
 }
 
 /** Something went wrong while trying to deserialize a response from the server. */
-class SerializationException(message: String, cause: Throwable? = null) :
+public class SerializationException(message: String, cause: Throwable? = null) :
   FirebaseVertexAIException(message, cause)
 
 /** The server responded with a non 200 response code. */
-class ServerException(message: String, cause: Throwable? = null) :
+public class ServerException(message: String, cause: Throwable? = null) :
   FirebaseVertexAIException(message, cause)
 
 /** The server responded that the API Key is not valid. */
-class InvalidAPIKeyException(message: String, cause: Throwable? = null) :
+public class InvalidAPIKeyException(message: String, cause: Throwable? = null) :
   FirebaseVertexAIException(message, cause)
 
 /**
@@ -87,7 +87,10 @@ class InvalidAPIKeyException(message: String, cause: Throwable? = null) :
  * @property response the full server response for the request.
  */
 // TODO(rlazo): Add secondary constructor to pass through the message?
-class PromptBlockedException(val response: GenerateContentResponse, cause: Throwable? = null) :
+public class PromptBlockedException(
+  public val response: GenerateContentResponse,
+  cause: Throwable? = null
+) :
   FirebaseVertexAIException(
     "Prompt was blocked: ${response.promptFeedback?.blockReason?.name}",
     cause,
@@ -101,7 +104,7 @@ class PromptBlockedException(val response: GenerateContentResponse, cause: Throw
  * (countries and territories) where the API is available.
  */
 // TODO(rlazo): Add secondary constructor to pass through the message?
-class UnsupportedUserLocationException(cause: Throwable? = null) :
+public class UnsupportedUserLocationException(cause: Throwable? = null) :
   FirebaseVertexAIException("User location is not supported for the API use.", cause)
 
 /**
@@ -109,7 +112,7 @@ class UnsupportedUserLocationException(cause: Throwable? = null) :
  *
  * Usually indicative of consumer error.
  */
-class InvalidStateException(message: String, cause: Throwable? = null) :
+public class InvalidStateException(message: String, cause: Throwable? = null) :
   FirebaseVertexAIException(message, cause)
 
 /**
@@ -117,7 +120,10 @@ class InvalidStateException(message: String, cause: Throwable? = null) :
  *
  * @property response the full server response for the request
  */
-class ResponseStoppedException(val response: GenerateContentResponse, cause: Throwable? = null) :
+public class ResponseStoppedException(
+  public val response: GenerateContentResponse,
+  cause: Throwable? = null
+) :
   FirebaseVertexAIException(
     "Content generation stopped. Reason: ${response.candidates.first().finishReason?.name}",
     cause,
@@ -128,7 +134,7 @@ class ResponseStoppedException(val response: GenerateContentResponse, cause: Thr
  *
  * Usually occurs due to a user specified [timeout][RequestOptions.timeout].
  */
-class RequestTimeoutException(message: String, cause: Throwable? = null) :
+public class RequestTimeoutException(message: String, cause: Throwable? = null) :
   FirebaseVertexAIException(message, cause)
 
 /**
@@ -137,7 +143,7 @@ class RequestTimeoutException(message: String, cause: Throwable? = null) :
  * For a list of valid locations, see
  * [Vertex AI locations.](https://cloud.google.com/vertex-ai/generative-ai/docs/learn/locations#available-regions)
  */
-class InvalidLocationException(location: String, cause: Throwable? = null) :
+public class InvalidLocationException(location: String, cause: Throwable? = null) :
   FirebaseVertexAIException("Invalid location \"${location}\"", cause)
 
 /**
@@ -145,9 +151,9 @@ class InvalidLocationException(location: String, cause: Throwable? = null) :
  * in the
  * [Firebase documentation.](https://firebase.google.com/docs/vertex-ai/faq-and-troubleshooting#required-apis)
  */
-class ServiceDisabledException(message: String, cause: Throwable? = null) :
+public class ServiceDisabledException(message: String, cause: Throwable? = null) :
   FirebaseVertexAIException(message, cause)
 
 /** Catch all case for exceptions not explicitly expected. */
-class UnknownException(message: String, cause: Throwable? = null) :
+public class UnknownException(message: String, cause: Throwable? = null) :
   FirebaseVertexAIException(message, cause)
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionCallingConfig.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionCallingConfig.kt
index ba09940c49c..30021c0fac9 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionCallingConfig.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionCallingConfig.kt
@@ -16,8 +16,6 @@
 
 package com.google.firebase.vertexai.type
 
-import com.google.firebase.vertexai.common.client.FunctionCallingConfig
-
 /**
  * Contains configuration for function calling from the model. This can be used to force function
  * calling predictions or disable them.
@@ -27,7 +25,7 @@ import com.google.firebase.vertexai.common.client.FunctionCallingConfig
  * should match [FunctionDeclaration.name]. With [Mode.ANY], model will predict a function call from
  * the set of function names provided.
  */
-class FunctionCallingConfig
+public class FunctionCallingConfig
 internal constructor(
   internal val mode: Mode,
   internal val allowedFunctionNames: List<String>? = null
@@ -51,23 +49,23 @@ internal constructor(
     NONE
   }
 
-  companion object {
+  public companion object {
     /**
      * The default behavior for function calling. The model calls functions to answer queries at its
      * discretion
      */
-    @JvmStatic fun auto() = FunctionCallingConfig(Mode.AUTO)
+    @JvmStatic public fun auto(): FunctionCallingConfig = FunctionCallingConfig(Mode.AUTO)
 
     /** The model always predicts a provided function call to answer every query. */
     @JvmStatic
     @JvmOverloads
-    fun any(allowedFunctionNames: List<String>? = null) =
+    public fun any(allowedFunctionNames: List<String>? = null): FunctionCallingConfig =
       FunctionCallingConfig(Mode.ANY, allowedFunctionNames)
 
     /**
      * The model will never predict a function call to answer a query. This can also be achieved by
      * not passing any tools to the model.
      */
-    @JvmStatic fun none() = FunctionCallingConfig(Mode.NONE)
+    @JvmStatic public fun none(): FunctionCallingConfig = FunctionCallingConfig(Mode.NONE)
   }
 }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionDeclaration.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionDeclaration.kt
index f1c0bbd0090..119a36d3eab 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionDeclaration.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/FunctionDeclaration.kt
@@ -36,11 +36,11 @@ package com.google.firebase.vertexai.type
  * @param optionalParameters A list of parameters that can be omitted.
  * @see Schema
  */
-class FunctionDeclaration(
-  val name: String,
-  val description: String,
-  val parameters: Map<String, Schema>,
-  val optionalParameters: List<String> = emptyList(),
+public class FunctionDeclaration(
+  internal val name: String,
+  internal val description: String,
+  internal val parameters: Map<String, Schema>,
+  internal val optionalParameters: List<String> = emptyList(),
 ) {
   internal val schema: Schema =
     Schema.obj(properties = parameters, optionalProperties = optionalParameters, nullable = false)
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerateContentResponse.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerateContentResponse.kt
index 83cbcf50229..61eb9218f33 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerateContentResponse.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerateContentResponse.kt
@@ -25,25 +25,25 @@ import android.util.Log
  * @property promptFeedback optional feedback for the given prompt. When streaming, it's only
  * populated in the first response.
  */
-class GenerateContentResponse(
-  val candidates: List<Candidate>,
-  val promptFeedback: PromptFeedback?,
-  val usageMetadata: UsageMetadata?,
+public class GenerateContentResponse(
+  public val candidates: List<Candidate>,
+  public val promptFeedback: PromptFeedback?,
+  public val usageMetadata: UsageMetadata?,
 ) {
   /** Convenience field representing all the text parts in the response, if they exists. */
-  val text: String? by lazy {
+  public val text: String? by lazy {
     candidates.first().content.parts.filterIsInstance<TextPart>().joinToString(" ") { it.text }
   }
 
   /** Convenience field to get all the function call parts in the request, if they exist */
-  val functionCalls: List<FunctionCallPart> by lazy {
+  public val functionCalls: List<FunctionCallPart> by lazy {
     candidates.first().content.parts.filterIsInstance<FunctionCallPart>()
   }
 
   /**
    * Convenience field representing the first function response part in the response, if it exists.
    */
-  val functionResponse: FunctionResponsePart? by lazy { firstPartAs() }
+  public val functionResponse: FunctionResponsePart? by lazy { firstPartAs() }
 
   private inline fun <reified T : Part> firstPartAs(): T? {
     if (candidates.isEmpty()) {
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerationConfig.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerationConfig.kt
index 16d7554ece5..8bf8d7a1ac7 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerationConfig.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/GenerationConfig.kt
@@ -73,18 +73,18 @@ package com.google.firebase.vertexai.type
  * [Control generated output](https://cloud.google.com/vertex-ai/generative-ai/docs/multimodal/control-generated-output)
  * guide for more details.
  */
-class GenerationConfig
+public class GenerationConfig
 private constructor(
-  val temperature: Float?,
-  val topK: Int?,
-  val topP: Float?,
-  val candidateCount: Int?,
-  val maxOutputTokens: Int?,
-  val presencePenalty: Float?,
-  val frequencyPenalty: Float?,
-  val stopSequences: List<String>?,
-  val responseMimeType: String?,
-  val responseSchema: Schema?,
+  internal val temperature: Float?,
+  internal val topK: Int?,
+  internal val topP: Float?,
+  internal val candidateCount: Int?,
+  internal val maxOutputTokens: Int?,
+  internal val presencePenalty: Float?,
+  internal val frequencyPenalty: Float?,
+  internal val stopSequences: List<String>?,
+  internal val responseMimeType: String?,
+  internal val responseSchema: Schema?,
 ) {
 
   /**
@@ -114,20 +114,20 @@ private constructor(
    * @property responseSchema See [GenerationConfig.responseSchema].
    * @see [generationConfig]
    */
-  class Builder {
-    @JvmField var temperature: Float? = null
-    @JvmField var topK: Int? = null
-    @JvmField var topP: Float? = null
-    @JvmField var candidateCount: Int? = null
-    @JvmField var maxOutputTokens: Int? = null
-    @JvmField var presencePenalty: Float? = null
-    @JvmField var frequencyPenalty: Float? = null
-    @JvmField var stopSequences: List<String>? = null
-    @JvmField var responseMimeType: String? = null
-    @JvmField var responseSchema: Schema? = null
+  public class Builder {
+    @JvmField public var temperature: Float? = null
+    @JvmField public var topK: Int? = null
+    @JvmField public var topP: Float? = null
+    @JvmField public var candidateCount: Int? = null
+    @JvmField public var maxOutputTokens: Int? = null
+    @JvmField public var presencePenalty: Float? = null
+    @JvmField public var frequencyPenalty: Float? = null
+    @JvmField public var stopSequences: List<String>? = null
+    @JvmField public var responseMimeType: String? = null
+    @JvmField public var responseSchema: Schema? = null
 
     /** Create a new [GenerationConfig] with the attached arguments. */
-    fun build() =
+    public fun build(): GenerationConfig =
       GenerationConfig(
         temperature = temperature,
         topK = topK,
@@ -142,7 +142,7 @@ private constructor(
       )
   }
 
-  companion object {
+  public companion object {
 
     /**
      * Alternative casing for [GenerationConfig.Builder]:
@@ -150,7 +150,7 @@ private constructor(
      * val config = GenerationConfig.builder()
      * ```
      */
-    fun builder() = Builder()
+    public fun builder(): Builder = Builder()
   }
 }
 
@@ -169,7 +169,7 @@ private constructor(
  * }
  * ```
  */
-fun generationConfig(init: GenerationConfig.Builder.() -> Unit): GenerationConfig {
+public fun generationConfig(init: GenerationConfig.Builder.() -> Unit): GenerationConfig {
   val builder = GenerationConfig.builder()
   builder.init()
   return builder.build()
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockMethod.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockMethod.kt
index b4a1fcd17ff..032f5353c97 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockMethod.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockMethod.kt
@@ -20,7 +20,7 @@ package com.google.firebase.vertexai.type
  * Specifies how the block method computes the score that will be compared against the
  * [HarmBlockThreshold] in [SafetySetting].
  */
-enum class HarmBlockMethod {
+public enum class HarmBlockMethod {
   /**
    * The harm block method uses both probability and severity scores. See [HarmSeverity] and
    * [HarmProbability].
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockThreshold.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockThreshold.kt
index ade2d1a9513..162ec2a7a1f 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockThreshold.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmBlockThreshold.kt
@@ -19,7 +19,7 @@ package com.google.firebase.vertexai.type
 /**
  * Represents the threshold for some [HarmCategory] that is allowed and blocked by [SafetySetting].
  */
-enum class HarmBlockThreshold {
+public enum class HarmBlockThreshold {
   /** Content with negligible harm is allowed. */
   LOW_AND_ABOVE,
 
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmCategory.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmCategory.kt
index 68473f98187..40d104b158b 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmCategory.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmCategory.kt
@@ -17,7 +17,7 @@
 package com.google.firebase.vertexai.type
 
 /** Category for a given harm rating. */
-enum class HarmCategory {
+public enum class HarmCategory {
   /** A new and not yet supported value. */
   UNKNOWN,
 
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmProbability.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmProbability.kt
index 56ab86e4707..6f877dacc8d 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmProbability.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmProbability.kt
@@ -17,7 +17,7 @@
 package com.google.firebase.vertexai.type
 
 /** Represents the probability that some [HarmCategory] is applicable in a [SafetyRating]. */
-enum class HarmProbability {
+public enum class HarmProbability {
   /** A new and not yet supported value. */
   UNKNOWN,
 
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmSeverity.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmSeverity.kt
index 8e3f0d37c9a..a5526a66db2 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmSeverity.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/HarmSeverity.kt
@@ -17,7 +17,7 @@
 package com.google.firebase.vertexai.type
 
 /** Represents the severity of a [HarmCategory] being applicable in a [SafetyRating]. */
-enum class HarmSeverity {
+public enum class HarmSeverity {
   /** A new and not yet supported value. */
   UNKNOWN,
 
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Part.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Part.kt
index ea9635a2ef4..556e518534a 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Part.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Part.kt
@@ -21,10 +21,10 @@ import kotlinx.serialization.json.JsonElement
 import kotlinx.serialization.json.JsonObject
 
 /** Interface representing data sent to and received from requests. */
-interface Part
+public interface Part
 
 /** Represents text or string based data sent to and received from requests. */
-class TextPart(val text: String) : Part
+public class TextPart(public val text: String) : Part
 
 /**
  * Represents image data sent to and received from requests. When this is sent to the server it is
@@ -32,7 +32,7 @@ class TextPart(val text: String) : Part
  *
  * @param image [Bitmap] to convert into a [Part]
  */
-class ImagePart(val image: Bitmap) : Part
+public class ImagePart(public val image: Bitmap) : Part
 
 /**
  * Represents binary data with an associated MIME type sent to and received from requests.
@@ -42,14 +42,14 @@ class ImagePart(val image: Bitmap) : Part
  * .
  * @param inlineData the binary data as a [ByteArray]
  */
-class InlineDataPart(val mimeType: String, val inlineData: ByteArray) : Part
+public class InlineDataPart(public val mimeType: String, public val inlineData: ByteArray) : Part
 
 /**
  * Represents a function call request from the model
  *
  * @param functionCall The information provided by the model to call a function.
  */
-class FunctionCallPart(val functionCall: FunctionCall) : Part
+public class FunctionCallPart(public val functionCall: FunctionCall) : Part
 
 /**
  * The result of calling a function as requested by the model.
@@ -57,7 +57,7 @@ class FunctionCallPart(val functionCall: FunctionCall) : Part
  * @param functionResponse The information to send back to the model as the result of a functions
  * call.
  */
-class FunctionResponsePart(val functionResponse: FunctionResponse) : Part
+public class FunctionResponsePart(public val functionResponse: FunctionResponse) : Part
 
 /**
  * The data necessary to invoke function [name] using the arguments [args].
@@ -65,7 +65,7 @@ class FunctionResponsePart(val functionResponse: FunctionResponse) : Part
  * @param name the name of the function to call
  * @param args the function parameters and values as a [Map]
  */
-class FunctionCall(val name: String, val args: Map<String, JsonElement>)
+public class FunctionCall(public val name: String, public val args: Map<String, JsonElement>)
 
 /**
  * The [response] generated after calling function [name].
@@ -73,7 +73,7 @@ class FunctionCall(val name: String, val args: Map<String, JsonElement>)
  * @param name the name of the called function
  * @param response the response produced by the function as a [JsonObject]
  */
-class FunctionResponse(val name: String, val response: JsonObject)
+public class FunctionResponse(public val name: String, public val response: JsonObject)
 
 /**
  * Represents file data stored in Cloud Storage for Firebase, referenced by URI.
@@ -83,16 +83,16 @@ class FunctionResponse(val name: String, val response: JsonObject)
  * @param mimeType an IANA standard MIME type. For supported MIME type values see the
  * [Firebase documentation](https://firebase.google.com/docs/vertex-ai/input-file-requirements).
  */
-class FileDataPart(val uri: String, val mimeType: String) : Part
+public class FileDataPart(public val uri: String, public val mimeType: String) : Part
 
 /** Returns the part as a [String] if it represents text, and null otherwise */
-fun Part.asTextOrNull(): String? = (this as? TextPart)?.text
+public fun Part.asTextOrNull(): String? = (this as? TextPart)?.text
 
 /** Returns the part as a [Bitmap] if it represents an image, and null otherwise */
-fun Part.asImageOrNull(): Bitmap? = (this as? ImagePart)?.image
+public fun Part.asImageOrNull(): Bitmap? = (this as? ImagePart)?.image
 
 /** Returns the part as a [InlineDataPart] if it represents inline data, and null otherwise */
-fun Part.asInlineDataPartOrNull(): InlineDataPart? = this as? InlineDataPart
+public fun Part.asInlineDataPartOrNull(): InlineDataPart? = this as? InlineDataPart
 
 /** Returns the part as a [FileDataPart] if it represents a file, and null otherwise */
-fun Part.asFileDataOrNull(): FileDataPart? = this as? FileDataPart
+public fun Part.asFileDataOrNull(): FileDataPart? = this as? FileDataPart
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/PromptFeedback.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/PromptFeedback.kt
index 3043dd01632..8486ef76f75 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/PromptFeedback.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/PromptFeedback.kt
@@ -23,14 +23,14 @@ package com.google.firebase.vertexai.type
  * @param safetyRatings A list of relevant [SafetyRating].
  * @param blockReasonMessage A message describing the reason that content was blocked, if any.
  */
-class PromptFeedback(
-  val blockReason: BlockReason?,
-  val safetyRatings: List<SafetyRating>,
-  val blockReasonMessage: String?
+public class PromptFeedback(
+  public val blockReason: BlockReason?,
+  public val safetyRatings: List<SafetyRating>,
+  public val blockReasonMessage: String?
 )
 
 /** Describes why content was blocked. */
-enum class BlockReason {
+public enum class BlockReason {
   /** A new and not yet supported value. */
   UNKNOWN,
 
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/RequestOptions.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/RequestOptions.kt
index dbfbc5b9367..9aa648b6d07 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/RequestOptions.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/RequestOptions.kt
@@ -22,7 +22,7 @@ import kotlin.time.DurationUnit
 import kotlin.time.toDuration
 
 /** Configurable options unique to how requests to the backend are performed. */
-class RequestOptions
+public class RequestOptions
 internal constructor(
   internal val timeout: Duration,
   internal val endpoint: String = "https://firebasevertexai.googleapis.com",
@@ -36,7 +36,7 @@ internal constructor(
    * the first request to first response.
    */
   @JvmOverloads
-  constructor(
+  public constructor(
     timeoutInMillis: Long = 180.seconds.inWholeMilliseconds
   ) : this(timeout = timeoutInMillis.toDuration(DurationUnit.MILLISECONDS))
 }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/SafetySetting.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/SafetySetting.kt
index 1e0bc763097..752353f8e4f 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/SafetySetting.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/SafetySetting.kt
@@ -24,8 +24,8 @@ package com.google.firebase.vertexai.type
  * @param threshold The threshold form harm allowable.
  * @param method Specify if the threshold is used for probability or severity score.
  */
-class SafetySetting(
-  val harmCategory: HarmCategory,
-  val threshold: HarmBlockThreshold,
-  val method: HarmBlockMethod = HarmBlockMethod.PROBABILITY
+public class SafetySetting(
+  internal val harmCategory: HarmCategory,
+  internal val threshold: HarmBlockThreshold,
+  internal val method: HarmBlockMethod = HarmBlockMethod.PROBABILITY
 )
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Schema.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Schema.kt
index 4d041c917d2..f599e7d3b81 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Schema.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Schema.kt
@@ -16,27 +16,27 @@
 
 package com.google.firebase.vertexai.type
 
-sealed class StringFormat(val value: String) {
-  class Custom(format: String) : StringFormat(format)
+public sealed class StringFormat(public val value: String) {
+  public class Custom(format: String) : StringFormat(format)
 }
 
 /** Represents a schema */
-class Schema
+public class Schema
 internal constructor(
-  val type: String,
-  val description: String? = null,
-  val format: String? = null,
-  val nullable: Boolean? = null,
-  val enum: List<String>? = null,
-  val properties: Map<String, Schema>? = null,
-  val required: List<String>? = null,
-  val items: Schema? = null,
+  public val type: String,
+  public val description: String? = null,
+  public val format: String? = null,
+  public val nullable: Boolean? = null,
+  public val enum: List<String>? = null,
+  public val properties: Map<String, Schema>? = null,
+  public val required: List<String>? = null,
+  public val items: Schema? = null,
 ) {
 
-  companion object {
+  public companion object {
     /** Returns a schema for a boolean */
     @JvmStatic
-    fun boolean(description: String? = null, nullable: Boolean = false) =
+    public fun boolean(description: String? = null, nullable: Boolean = false): Schema =
       Schema(
         description = description,
         nullable = nullable,
@@ -51,7 +51,7 @@ internal constructor(
      */
     @JvmStatic
     @JvmName("numInt")
-    fun integer(description: String? = null, nullable: Boolean = false) =
+    public fun integer(description: String? = null, nullable: Boolean = false): Schema =
       Schema(
         description = description,
         format = "int32",
@@ -67,7 +67,7 @@ internal constructor(
      */
     @JvmStatic
     @JvmName("numLong")
-    fun long(description: String? = null, nullable: Boolean = false) =
+    public fun long(description: String? = null, nullable: Boolean = false): Schema =
       Schema(
         description = description,
         nullable = nullable,
@@ -82,7 +82,7 @@ internal constructor(
      */
     @JvmStatic
     @JvmName("numDouble")
-    fun double(description: String? = null, nullable: Boolean = false) =
+    public fun double(description: String? = null, nullable: Boolean = false): Schema =
       Schema(description = description, nullable = nullable, type = "NUMBER", format = "double")
 
     /**
@@ -93,7 +93,7 @@ internal constructor(
      */
     @JvmStatic
     @JvmName("numFloat")
-    fun float(description: String? = null, nullable: Boolean = false) =
+    public fun float(description: String? = null, nullable: Boolean = false): Schema =
       Schema(description = description, nullable = nullable, type = "NUMBER", format = "float")
 
     /**
@@ -105,11 +105,11 @@ internal constructor(
      */
     @JvmStatic
     @JvmName("str")
-    fun string(
+    public fun string(
       description: String? = null,
       nullable: Boolean = false,
       format: StringFormat? = null
-    ) =
+    ): Schema =
       Schema(
         description = description,
         format = format?.value,
@@ -125,7 +125,7 @@ internal constructor(
      * @param nullable: Whether null is a valid value for this schema
      */
     @JvmStatic
-    fun obj(
+    public fun obj(
       properties: Map<String, Schema>,
       optionalProperties: List<String> = emptyList(),
       description: String? = null,
@@ -153,7 +153,11 @@ internal constructor(
      * @param nullable: Whether null is a valid value for this schema
      */
     @JvmStatic
-    fun array(items: Schema, description: String? = null, nullable: Boolean = false) =
+    public fun array(
+      items: Schema,
+      description: String? = null,
+      nullable: Boolean = false
+    ): Schema =
       Schema(
         description = description,
         nullable = nullable,
@@ -169,7 +173,11 @@ internal constructor(
      * @param nullable: Whether null is a valid value for this schema
      */
     @JvmStatic
-    fun enumeration(values: List<String>, description: String? = null, nullable: Boolean = false) =
+    public fun enumeration(
+      values: List<String>,
+      description: String? = null,
+      nullable: Boolean = false
+    ): Schema =
       Schema(
         description = description,
         format = "enum",
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Tool.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Tool.kt
index 0400387c081..41cbf99f6c4 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Tool.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/Tool.kt
@@ -22,8 +22,9 @@ package com.google.firebase.vertexai.type
  *
  * @param functionDeclarations The set of functions that this tool allows the model access to
  */
-class Tool internal constructor(internal val functionDeclarations: List<FunctionDeclaration>?) {
-  companion object {
+public class Tool
+internal constructor(internal val functionDeclarations: List<FunctionDeclaration>?) {
+  public companion object {
 
     /**
      * Creates a [Tool] instance that provides the model with access to the [functionDeclarations].
@@ -31,7 +32,7 @@ class Tool internal constructor(internal val functionDeclarations: List<Function
      * @param functionDeclarations The list of functions that this tool allows the model access to.
      */
     @JvmStatic
-    fun functionDeclarations(functionDeclarations: List<FunctionDeclaration>): Tool {
+    public fun functionDeclarations(functionDeclarations: List<FunctionDeclaration>): Tool {
       return Tool(functionDeclarations)
     }
   }
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/ToolConfig.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/ToolConfig.kt
index 38ea3837801..7641120b2ee 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/ToolConfig.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/ToolConfig.kt
@@ -22,4 +22,4 @@ package com.google.firebase.vertexai.type
  *
  * @param functionCallingConfig The config for function calling
  */
-class ToolConfig(val functionCallingConfig: FunctionCallingConfig)
+public class ToolConfig(internal val functionCallingConfig: FunctionCallingConfig)
diff --git a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/UsageMetadata.kt b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/UsageMetadata.kt
index 6b403e11530..21da0255cb9 100644
--- a/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/UsageMetadata.kt
+++ b/firebase-vertexai/src/main/kotlin/com/google/firebase/vertexai/type/UsageMetadata.kt
@@ -23,8 +23,8 @@ package com.google.firebase.vertexai.type
  * @param candidatesTokenCount Number of tokens in the response(s).
  * @param totalTokenCount Total number of tokens.
  */
-class UsageMetadata(
-  val promptTokenCount: Int,
-  val candidatesTokenCount: Int?,
-  val totalTokenCount: Int
+public class UsageMetadata(
+  public val promptTokenCount: Int,
+  public val candidatesTokenCount: Int?,
+  public val totalTokenCount: Int
 )