diff --git a/extensions/image-processing-api/PREINSTALL.md b/extensions/image-processing-api/PREINSTALL.md
index f1dcd1a2..1d674fc3 100644
--- a/extensions/image-processing-api/PREINSTALL.md
+++ b/extensions/image-processing-api/PREINSTALL.md
@@ -22,6 +22,40 @@ const operations = [
 const params = `?operations=${encodeURIComponent(JSON.stringify(operations))}`;
 ```
 
+Input types are:
+
+1. `url` - A public URL to an image.
+
+    ```js
+    {
+      operation: 'input',
+      type: 'url',
+      url: 'https://example.com/image.jpg',
+    }
+    ```
+
+2. `gcs` - A Google Cloud Storage public link to an image.
+
+    ```js
+    {
+      operation: 'input',
+      type: 'gcs',
+      source: 'image.jpg',
+    }
+    ```
+
+3. `create` - Create a new image by specifying options such as width, height, background color, etc.
+
+    ```js
+    {
+      operation: 'input',
+      type: 'create',
+      width: 100,
+      height: 100,
+      background: '#000000',
+    }
+    ```
+
 The extension also comes with a JavaScript utility library for simplifying the creation of operations:
 
 ```ts
@@ -33,7 +67,7 @@ const output = builder()
   })
   .grayscale()
   .output({
-    format: 'webp',
+    webp: true,
   });
 
 const params = `?operations=${output.toEncodedJSONString()}`;
@@ -51,5 +85,5 @@ To install an extension, your project must be on the [Blaze (pay as you go) plan
 
 - You will be charged a small amount (typically around $0.01/month) for the Firebase resources required by this extension (even if it is not used).
 - This extension uses other Firebase and Google Cloud Platform services, which have associated charges if you exceed the service’s no-cost tier:
-  - Cloud Storage
   - Cloud Functions (Node.js 10+ runtime. [See FAQs](https://firebase.google.com/support/faq#extensions-pricing))
+  - Cloud Storage
diff --git a/extensions/image-processing-api/README.md b/extensions/image-processing-api/README.md
index 225540aa..02f55e92 100644
--- a/extensions/image-processing-api/README.md
+++ b/extensions/image-processing-api/README.md
@@ -28,6 +28,57 @@ const operations = [
 const params = `?operations=${encodeURIComponent(JSON.stringify(operations))}`;
 ```
 
+Input types are:
+
+1. `url` - A public URL to an image.
+
+    ```js
+    {
+      operation: 'input',
+      type: 'url',
+      url: 'https://example.com/image.jpg',
+    }
+    ```
+
+2. `gcs` - A Google Cloud Storage public link to an image.
+
+    ```js
+    {
+      operation: 'input',
+      type: 'gcs',
+      source: 'image.jpg',
+    }
+    ```
+
+3. `create` - Create a new image by specifying options such as width, height, background color, etc.
+
+    ```js
+    {
+      operation: 'input',
+      type: 'create',
+      width: 100,
+      height: 100,
+      background: '#000000',
+    }
+    ```
+
+The extension also comes with a JavaScript utility library for simplifying the creation of operations:
+
+```ts
+import { builder } from '@invertase/image-processing-api';
+
+const output = builder()
+  .input({
+    url: 'https://example.com/image.jpg',
+  })
+  .grayscale()
+  .output({
+    webp: true,
+  });
+
+const params = `?operations=${output.toEncodedJSONString()}`;
+```
+
 View the [official documentation](https://extensions.invertase.dev/image-processing-api) for full usage examples.
 
 #### Additional setup
@@ -40,14 +91,14 @@ To install an extension, your project must be on the [Blaze (pay as you go) plan
 
 - You will be charged a small amount (typically around $0.01/month) for the Firebase resources required by this extension (even if it is not used).
 - This extension uses other Firebase and Google Cloud Platform services, which have associated charges if you exceed the service’s no-cost tier:
-  - Cloud Storage
   - Cloud Functions (Node.js 10+ runtime. [See FAQs](https://firebase.google.com/support/faq#extensions-pricing))
-
+  - Cloud Storage
+  
 **Configuration Parameters:**
 
 - Cloud Functions location: Where do you want to deploy the functions created for this extension? You usually want a location close to your Storage bucket. For help selecting a location, refer to the [location selection guide](https://firebase.google.com/docs/functions/locations).
 
-- Cloud Storage bucket for images: The Cloud Storage bucket where images that are to be processed are located. API requests with input urls or paths that are not inside this bucket will be dropped.
+- Cloud Storage bucket for images: The Cloud Storage bucket for images from a `gcs` input type.
 
 - Allowed CORS origins.: A comma delimited value of allowed CORS origins. Use the default of '\*' to allow all origins. This is useful to lockdown your API and only allow your own website to embed the images directly. Note this will not prevent non-browser requests from accessing your API.
 
diff --git a/extensions/image-processing-api/extension.yaml b/extensions/image-processing-api/extension.yaml
index dd756676..c3e87bed 100644
--- a/extensions/image-processing-api/extension.yaml
+++ b/extensions/image-processing-api/extension.yaml
@@ -98,9 +98,7 @@ params:
   - param: CLOUD_STORAGE_BUCKET
     label: Cloud Storage bucket for images
     description: >
-      The Cloud Storage bucket where images that are to be processed are located.
-      API requests with input urls or paths that are not inside this bucket will be
-      dropped.
+      The Cloud Storage bucket for images from a `gcs` input type.
     type: string
     example: my-project-12345.appspot.com
     validationRegex: ^([0-9a-z_.-]*)$