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Merged
merged 5 commits into from
Sep 11, 2025
Merged

Remove dependency on CIO engine #223

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729718a
remove dependency on CIO in client module
MukjepScarlet Aug 13, 2025
cfa04bf
remove dependency on CIO in server module
MukjepScarlet Aug 13, 2025
9c94292
add CIO dependency for test and sample
MukjepScarlet Aug 13, 2025
ef72f8f
Add CIO runtime dependencies and slf4j
kpavlov Sep 11, 2025
f37ad7d
Use implementation dependencies in samples
kpavlov Sep 11, 2025
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15 changes: 14 additions & 1 deletion README.md
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Expand Up @@ -40,10 +40,23 @@ Add the dependency:

```kotlin
dependencies {
// Use the badge above for the latest version
// See the badge above for the latest version
implementation("io.modelcontextprotocol:kotlin-sdk:$mcpVersion")
}
```
MCP SDK uses [Ktor](https://ktor.io/), but does not come with a specific engine dependency.
You should add [Ktor client](https://ktor.io/docs/client-dependencies.html#engine-dependency)
and/or [Ktor server](https://ktor.io/docs/client-dependencies.html#engine-dependency) dependency
to your project yourself, e.g.:
```kotlin
dependencies {
// for client:
implementation("io.ktor:ktor-client-cio:$ktorVersion")
// for server:
implementation("io.ktor:ktor-server-netty:$ktorVersion")

}
```

## Quick Start

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6 changes: 4 additions & 2 deletions gradle/libs.versions.toml
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Expand Up @@ -39,10 +39,10 @@ kotlinx-collections-immutable = { group = "org.jetbrains.kotlinx", name = "kotli
kotlin-logging = { group = "io.github.oshai", name = "kotlin-logging", version.ref = "logging" }

# Ktor
ktor-client-cio = { group = "io.ktor", name = "ktor-client-cio", version.ref = "ktor" }
ktor-client-core = { group = "io.ktor", name = "ktor-client-core", version.ref = "ktor" }
ktor-server-sse = { group = "io.ktor", name = "ktor-server-sse", version.ref = "ktor" }
ktor-server-websockets = { group = "io.ktor", name = "ktor-server-websockets", version.ref = "ktor" }
ktor-server-cio = { group = "io.ktor", name = "ktor-server-cio", version.ref = "ktor" }
ktor-server-core = { group = "io.ktor", name = "ktor-server-core", version.ref = "ktor" }

# Testing
kotlinx-coroutines-test = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-test", version.ref = "coroutines" }
Expand All @@ -52,6 +52,8 @@ slf4j-simple = { group = "org.slf4j", name = "slf4j-simple", version.ref = "slf4
kotest-assertions-json = { group = "io.kotest", name = "kotest-assertions-json", version.ref = "kotest" }

# Samples
ktor-client-cio = { group = "io.ktor", name = "ktor-client-cio", version.ref = "ktor" }
ktor-server-cio = { group = "io.ktor", name = "ktor-server-cio", version.ref = "ktor" }
mcp-kotlin = { group = "io.modelcontextprotocol", name = "kotlin-sdk", version.ref = "mcp-kotlin" }
anthropic-java = { group = "com.anthropic", name = "anthropic-java", version.ref = "anthropic" }
ktor-client-content-negotiation = { group = "io.ktor", name = "ktor-client-content-negotiation", version.ref = "ktor" }
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3 changes: 2 additions & 1 deletion kotlin-sdk-client/build.gradle.kts
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Expand Up @@ -33,7 +33,7 @@ kotlin {
commonMain {
dependencies {
api(project(":kotlin-sdk-core"))
api(libs.ktor.client.cio)
api(libs.ktor.client.core)
implementation(libs.kotlin.logging)
}
}
Expand All @@ -43,6 +43,7 @@ kotlin {
implementation(kotlin("test"))
implementation(libs.ktor.client.mock)
implementation(libs.kotlinx.coroutines.test)
runtimeOnly(libs.slf4j.simple)
}
}
}
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6 changes: 6 additions & 0 deletions kotlin-sdk-core/build.gradle.kts
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Expand Up @@ -47,5 +47,11 @@ kotlin {
implementation(libs.kotest.assertions.json)
}
}

jvmTest {
dependencies {
runtimeOnly(libs.slf4j.simple)
}
}
}
}
9 changes: 7 additions & 2 deletions kotlin-sdk-server/build.gradle.kts
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Expand Up @@ -11,7 +11,7 @@ kotlin {
commonMain {
dependencies {
api(project(":kotlin-sdk-core"))
api(libs.ktor.server.cio)
api(libs.ktor.server.core)
api(libs.ktor.server.sse)
implementation(libs.kotlin.logging)
}
Expand All @@ -21,7 +21,12 @@ kotlin {
dependencies {
implementation(kotlin("test"))
implementation(libs.kotlinx.coroutines.test)
implementation(libs.slf4j.simple)
}
}

jvmTest {
dependencies {
runtimeOnly(libs.slf4j.simple)
}
}
}
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11 changes: 6 additions & 5 deletions kotlin-sdk-test/build.gradle.kts
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Expand Up @@ -13,17 +13,18 @@ kotlin {
dependencies {
implementation(project(":kotlin-sdk"))
implementation(kotlin("test"))
implementation(libs.ktor.server.test.host)
implementation(libs.kotlinx.coroutines.test)
implementation(libs.kotest.assertions.json)
implementation(libs.kotlin.logging)
implementation(libs.kotlinx.coroutines.test)
implementation(libs.ktor.client.cio)
implementation(libs.ktor.server.cio)
implementation(libs.ktor.server.test.host)
}
}
jvmTest {
dependencies {
implementation(kotlin("test-junit5"))
implementation(libs.kotlin.logging)
implementation(libs.ktor.server.cio)
implementation(libs.ktor.client.cio)
runtimeOnly(libs.slf4j.simple)
}
}
}
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3 changes: 2 additions & 1 deletion samples/kotlin-mcp-client/build.gradle.kts
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Expand Up @@ -13,8 +13,9 @@ version = "0.1.0"

dependencies {
implementation(libs.mcp.kotlin)
implementation(libs.slf4j.simple)
implementation(libs.ktor.client.cio)
implementation(libs.anthropic.java)
implementation(libs.slf4j.simple)
}

tasks.test {
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1 change: 1 addition & 0 deletions samples/kotlin-mcp-server/build.gradle.kts
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Expand Up @@ -44,6 +44,7 @@ kotlin {
sourceSets {
commonMain.dependencies {
implementation(libs.mcp.kotlin)
implementation(libs.ktor.server.cio)
}
jvmMain.dependencies {
implementation(libs.slf4j.simple)
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8 changes: 5 additions & 3 deletions samples/weather-stdio-server/build.gradle.kts
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Expand Up @@ -13,15 +13,17 @@ repositories {
mavenCentral()
}


group = "org.example"
version = "0.1.0"

dependencies {
implementation(libs.mcp.kotlin)
implementation(libs.slf4j.simple)
implementation(libs.ktor.client.content.negotiation)
implementation(libs.ktor.serialization.kotlinx.json)
implementation(libs.mcp.kotlin)
implementation(libs.ktor.server.cio)
implementation(libs.ktor.client.cio)
implementation(libs.slf4j.simple)

testImplementation(kotlin("test"))
testImplementation(libs.kotlinx.coroutines.test)
}
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