> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-codex-api-first-result.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Imagen 3.0 Generate 002 with Comfy Router

> Call vertexai/imagen-3.0-generate-002 through Comfy Router: endpoint, request shape and the response Router returns.

API Reference for `vertexai/imagen-3.0-generate-002`, served by Comfy Router from Google.

## Quick start

Create a key in [your Comfy workspace](https://platform.comfy.org/profile/api-keys) and export it as `COMFY_API_KEY`. The Python and TypeScript snippets use the Comfy SDKs (`pip install comfy-sdk`, `npm install @comfyorg/sdk`); the cURL snippet is the same call over raw HTTP.

**Model ID:** `vertexai/imagen-3.0-generate-002`

**Endpoint:** `POST https://api.comfy.org/v2/models/vertexai/imagen-3.0-generate-002`

<Tabs>
  <Tab title="Wait for the result">
    <CodeGroup>
      ```python Python theme={null}
      from comfy_sdk import Comfy

      # Reads COMFY_API_KEY from the environment.
      # The SDK automatically creates an idempotency key and reuses it for automatic retries.
      with Comfy() as client:
          result = client.models.run(
              "vertexai/imagen-3.0-generate-002",
              {
                  "instances": [
                      {
                          "prompt": "A single red maple leaf on a plain white background.",
                      },
                  ],
                  "parameters": {
                      "sampleCount": 1,
                  },
              },
          )

      print(result)
      ```

      ```typescript TypeScript theme={null}
      import { comfy } from "@comfyorg/sdk";

      // Reads COMFY_API_KEY from the environment.
      // The SDK automatically creates an idempotency key and reuses it for automatic retries.
      const { data } = await comfy.models.run("vertexai/imagen-3.0-generate-002", {
        instances: [
          {
            prompt: "A single red maple leaf on a plain white background.",
          },
        ],
        parameters: {
          sampleCount: 1,
        },
      });

      console.log(data);
      ```

      ```bash cURL theme={null}
      curl https://api.comfy.org/v2/models/vertexai/imagen-3.0-generate-002 \
        -H "X-API-Key: $COMFY_API_KEY" \
        -H "Idempotency-Key: $(uuidgen)" \
        -H "Content-Type: application/json" \
        -d "{\"instances\": [{\"prompt\":\"A single red maple leaf on a plain white background.\"}], \"parameters\": {\"sampleCount\":1}}"
      ```
    </CodeGroup>
  </Tab>

  <Tab title="Queue and collect later">
    <Note>
      Queued delivery is rolling out per workspace. Until yours is enabled, the submit route answers `403` with `X-Comfy-Error-Type: not_enabled`. Nothing about the request is wrong, and the same body works through the synchronous route in the meantime.
    </Note>

    The same body, sent to `POST https://api.comfy.org/v2/models/vertexai/imagen-3.0-generate-002/requests`. Router answers `201` with a `request_id` as soon as the run is admitted, and the result is collected once it is ready, from this process or another one. [Queued delivery](/development/comfy-router/queue) walks through status, cancellation and collection.

    <CodeGroup>
      ```python Python theme={null}
      from comfy_sdk import Comfy

      # Reads COMFY_API_KEY from the environment.
      # Each submit() call mints its own Idempotency-Key and reuses it for automatic retries.
      with Comfy() as client:
          handle = client.models.submit(
              "vertexai/imagen-3.0-generate-002",
              {
                  "instances": [
                      {
                          "prompt": "A single red maple leaf on a plain white background.",
                      },
                  ],
                  "parameters": {
                      "sampleCount": 1,
                  },
              },
          )
          print("request_id:", handle.request_id)  # with the model ID, all another process needs

          # Poll until the request completes, waiting the Retry-After the server names.
          for update in handle.iter_events():
              print(update.status, update.queue_position)

          # The provider's own payload, the same value models.run() returns.
          # A request that failed or was cancelled raises the typed Router error here.
          result = handle.get()

      print(result)
      ```

      ```typescript TypeScript theme={null}
      import { comfy } from "@comfyorg/sdk";

      // Reads COMFY_API_KEY from the environment.
      // Each submit() call mints its own Idempotency-Key and reuses it for automatic retries.
      const handle = await comfy.models.submit("vertexai/imagen-3.0-generate-002", {
        instances: [
          {
            prompt: "A single red maple leaf on a plain white background.",
          },
        ],
        parameters: {
          sampleCount: 1,
        },
      });
      console.log("requestId:", handle.requestId); // with the model ID, all another process needs

      // Poll until the request completes, waiting the Retry-After the server names.
      for await (const update of handle.events()) {
        console.log(update.status, update.queuePosition);
      }

      // The same result models.run() returns. A request that failed or was cancelled rejects here.
      const result = await handle.get();

      console.log(result.data);
      ```

      ```bash cURL theme={null}
      # 1. Submit. Router answers 201 with request_id, status_url, response_url and cancel_url.
      curl https://api.comfy.org/v2/models/vertexai/imagen-3.0-generate-002/requests \
        -H "X-API-Key: $COMFY_API_KEY" \
        -H "Idempotency-Key: $(uuidgen)" \
        -H "Content-Type: application/json" \
        -d "{\"instances\": [{\"prompt\":\"A single red maple leaf on a plain white background.\"}], \"parameters\": {\"sampleCount\":1}}"

      # 2. Poll until status is COMPLETED, waiting the Retry-After seconds each response names.
      REQUEST_ID="<request_id from the 201 body>"
      curl -i https://api.comfy.org/v2/models/vertexai/imagen-3.0-generate-002/requests/$REQUEST_ID/status \
        -H "X-API-Key: $COMFY_API_KEY"

      # 3. Collect. 200 with the model's native output, 202 with the status body while it is still running.
      curl https://api.comfy.org/v2/models/vertexai/imagen-3.0-generate-002/requests/$REQUEST_ID \
        -H "X-API-Key: $COMFY_API_KEY"
      ```
    </CodeGroup>
  </Tab>
</Tabs>

## Schema

### Input

<ParamField body="instances" type="object[]" required />

<ParamField body="instances[].prompt" type="string" required>
  Text prompt for image generation
</ParamField>

<ParamField body="parameters" type="object" />

<ParamField body="parameters.addWatermark" type="boolean" />

<ParamField body="parameters.aspectRatio" type="string">
  Possible values: `1:1`, `9:16`, `16:9`, `3:4`, `4:3`
</ParamField>

<ParamField body="parameters.enhancePrompt" type="boolean" />

<ParamField body="parameters.includeRaiReason" type="boolean" />

<ParamField body="parameters.includeSafetyAttributes" type="boolean" />

<ParamField body="parameters.outputOptions" type="object" />

<ParamField body="parameters.outputOptions.compressionQuality" type="integer">
  Range: `0` to `100`
</ParamField>

<ParamField body="parameters.outputOptions.mimeType" type="string">
  Possible values: `image/png`, `image/jpeg`
</ParamField>

<ParamField body="parameters.personGeneration" type="string">
  Possible values: `dont_allow`, `allow_adult`, `allow_all`
</ParamField>

<ParamField body="parameters.safetySetting" type="string">
  Possible values: `block_most`, `block_some`, `block_few`, `block_fewest`
</ParamField>

<ParamField body="parameters.sampleCount" type="integer">
  Range: `1` to `4`
</ParamField>

<ParamField body="parameters.seed" type="integer">
  Format: `uint32`
</ParamField>

<ParamField body="parameters.storageUri" type="string" />

Generated from the schema Router serves at `GET /v2/models/vertexai/imagen-3.0-generate-002/openapi.json`, the same document it validates a call against before the request reaches the provider.

### Output

<ResponseField name="predictions" type="object[]" />

<ResponseField name="predictions[].bytesBase64Encoded" type="string (byte)">
  Base64-encoded image content

  Format: `byte`
</ResponseField>

<ResponseField name="predictions[].mimeType" type="string">
  MIME type of the generated image
</ResponseField>

<ResponseField name="predictions[].prompt" type="string">
  Enhanced or rewritten prompt used to generate this image
</ResponseField>

## Examples

### Input

```json theme={null}
{
  "instances": [
    {
      "prompt": "A single red maple leaf on a plain white background."
    }
  ],
  "parameters": {
    "sampleCount": 1
  }
}
```

### Output

```json theme={null}
{
  "predictions": [
    {
      "bytesBase64Encoded": "PGJhc2U2ND4=",
      "mimeType": "image/png",
      "prompt": "A lighthouse at the edge of the harbour at dawn, warm low sun"
    }
  ]
}
```

## Before you ship

The SDKs create an `Idempotency-Key` and reuse it for automatic retries. For manual retries, reuse the original key. Router can hold the connection for up to 10 minutes.

When a request fails, Router sends an `X-Comfy-Error-Type` response header explaining why. A `422` means Router rejected the input before calling the provider. Download generated assets promptly because [result URLs can expire](/development/comfy-router/reference#result-assets).

<CardGroup cols={3}>
  <Card title="Headers" icon="list" href="/development/comfy-router/headers">
    Authentication, idempotency, request IDs, error buckets, retry pacing, spend limits.
  </Card>

  <Card title="Using the Router API" icon="code" href="/development/comfy-router/api">
    Model discovery, validation errors, retries, and billing.
  </Card>

  <Card title="Limitations" icon="triangle-exclamation" href="/development/comfy-router/limitations">
    What Router does not do today, and what to use instead.
  </Card>
</CardGroup>