Use Imagen 3.0 Fast Generate 001 with Comfy Router

Call vertexai/imagen-3.0-fast-generate-001 through Comfy Router: endpoint, request shape and the response Router returns.

Use vertexai/imagen-3.0-fast-generate-001 with the Comfy Router API. Google provides the model; Router gives it the shared authentication and request route below.

Quick start

Create a key at 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-fast-generate-001

Endpoint: POST https://api.comfy.org/v2/models/vertexai/imagen-3.0-fast-generate-001

Python

import uuid
from comfy_sdk import Comfy

# Reads COMFY_API_KEY from the environment. Store this UUID before starting a
# generation. Use the same value if you retry it.
idempotency_key = str(uuid.uuid4())
with Comfy() as client:
    result = client.models.run(
        "vertexai/imagen-3.0-fast-generate-001",
        {
            "instances": [
                {
                    "prompt": "A single red maple leaf on a plain white background.",
                },
            ],
            "parameters": {
                "sampleCount": 1,
            },
        },
        idempotency_key=idempotency_key,
        timeout=660.0,
    )

print(result)

Schema

Input

instances · object[] · required

instances[].prompt · string · required

Text prompt for image generation

parameters · object

parameters.addWatermark · boolean

parameters.aspectRatio · string

Possible values: 1:1, 9:16, 16:9, 3:4, 4:3

parameters.enhancePrompt · boolean

parameters.includeRaiReason · boolean

parameters.includeSafetyAttributes · boolean

parameters.outputOptions · object

parameters.outputOptions.compressionQuality · integer

Range: 0 to 100

parameters.outputOptions.mimeType · string

Possible values: image/png, image/jpeg

parameters.personGeneration · string

Possible values: dont_allow, allow_adult, allow_all

parameters.safetySetting · string

Possible values: block_most, block_some, block_few, block_fewest

parameters.sampleCount · integer

Range: 1 to 4

parameters.seed · integer

Format: uint32

parameters.storageUri · string

Generated from the schema Router serves at GET /v2/models/vertexai/imagen-3.0-fast-generate-001/openapi.json, the same document it validates a call against before the request reaches the provider.

Output

Router does not publish an output schema for this model.

Examples

Input

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

Before you ship

Save one Idempotency-Key for each call and reuse it for retries. Router can hold the connection for up to 10 minutes. The SDKs handle authentication; raw HTTP clients send the headers themselves.

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.

Headers

Authentication, idempotency, request IDs, error buckets, retry pacing, spend limits.

Using the Router API

Model discovery, validation errors, retries, and billing.

Limitations

What Router does not do today, and what to use instead.