Use Veo 3.1 Generate 001 with Comfy Router

Use veo/veo-3.1-generate-001 with the Comfy Router API. Veo 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: veo/veo-3.1-generate-001 Endpoint: POST https://api.comfy.org/v2/models/veo/veo-3.1-generate-001

import uuid
from comfy_sdk import Comfy

# Reads COMFY_API_KEY from the environment. Save this key and reuse it if you
# retry this request after the SDK returns an error.
idempotency_key = str(uuid.uuid4())
with Comfy() as client:
    result = client.models.run(
        "veo/veo-3.1-generate-001",
        {
            # Request fields are the provider's own — see Input below.
        },
        idempotency_key=idempotency_key,
    )

print(result)

import { comfy } from "@comfyorg/sdk";

// Reads COMFY_API_KEY from the environment. Save this key and reuse it if you
// retry this request after the SDK returns an error.
const idempotencyKey = crypto.randomUUID();
const { data } = await comfy.models.run("veo/veo-3.1-generate-001", {
  // Request fields are the provider's own — see Input below.
}, { idempotencyKey });

console.log(data);

# Request fields are the provider's own — see Input below.
# Run this line once. Reuse ROUTER_REQUEST_KEY if you retry the curl command.
ROUTER_REQUEST_KEY=$(uuidgen)
curl https://api.comfy.org/v2/models/veo/veo-3.1-generate-001 \
  -H "X-API-Key: $COMFY_API_KEY" \
  -H "Idempotency-Key: $ROUTER_REQUEST_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'

Schema

Input

object[]

string

Camera motion type. Requires image to be provided.Possible values: fixed, pan_left, pan_right, tilt_up, tilt_down, truck_left, truck_right, pedestal_up, pedestal_down, push_in, pull_out

object | object

Optional first frame image to guide video generation

string (byte)

Base64-encoded image dataFormat: byte

string

Cloud Storage URI of the image

string

MIME type of the image (image/jpeg or image/png)Possible values: image/jpeg, image/png

object | object

Optional last frame image. Used with image to generate video between first and last frames. Supported by Veo 3.0+ models.

string (byte)

Base64-encoded image dataFormat: byte

string

Cloud Storage URI of the image

string

MIME type of the image (image/jpeg or image/png)Possible values: image/jpeg, image/png

object | object

Optional mask for video editing. Applies to input video.

string (byte)

Base64-encoded mask bytesFormat: byte

string

Cloud Storage URI to mask file

string

How the mask is appliedPossible values: insert, remove, remove_static, outpaint

string

MIME type of the mask (image/png, image/jpeg, image/webp, or video formats)

string

required

Text description of the video to generate

object[]

Optional reference images to guide video generation. Supports up to 3 asset images or 1 style image. Supported by Veo 3.1 models (preview).

object | object

required

string (byte)

Base64-encoded image dataFormat: byte

string

Cloud Storage URI of the image

string

MIME type of the image (image/jpeg or image/png)Possible values: image/jpeg, image/png

string

Optional identifier for the reference image

string

required

Type of reference imagePossible values: asset, style

object | object

Optional input video for video extension or editing. Incompatible with image and referenceImages.

string (byte)

Base64-encoded video bytesFormat: byte

string

Cloud Storage URI of the input video

string

MIME type of the videoPossible values: video/mov, video/mpeg, video/mp4, video/mpg, video/avi, video/wmv, video/mpegps, video/x-flv

object

string

Aspect ratio of the generated video. Default: 16:9Possible values: 16:9, 9:16

string

Video compression quality. Default: optimizedPossible values: optimized, lossless

number

Target duration of the generated video in seconds. Veo 2: 5-8. Veo 3/3.1: 4, 6, or 8. Default: 8

boolean

Automatically improve prompt for higher quality. Defaults to true.

integer

Frame rate of generated videos in frames per second

boolean

Whether to generate audio along with the video. Defaults to true. Supported by Veo 3.0+ models.

string

Text describing what to avoid in the generated video

string

Controls people in generated videos. Default: allow_adultPossible values: dont_allow, allow_adult, allowAll

string

Cloud Pub/Sub topic for progress updates (projects/{project}/topics/{topic})

string

Resize approach for input image. Default: padPossible values: pad, crop

string

Output video resolution. Supported by Veo 3.0+ models. Default: 720pPossible values: 720p, 1080p, 4k

integer

Number of videos to generate. If not specified, 1 video is generated.Range: 1 to 4

integer

Random seed for deterministic output. Different seeds used per video if sampleCount > 1.Format: uint32

string

Cloud Storage URI (gs://) for saving generated videos

string

Operation type for the video generation requestPossible values: textToVideo, imageToVideo, referenceToVideo, edit, extend, upscale

Generated from the schema Router serves at GET /v2/models/veo/veo-3.1-generate-001/openapi.json, the same document it validates a call against before the request reaches the provider.

Output

boolean

Whether the operation has completed

object

Error details, present if the operation failed

integer

gRPC error code

string

Error message

string

Operation resource name

object

The prediction response, present when done is true

string

integer

Number of videos filtered by responsible AI policies

string[]

Reasons why videos were filtered by responsible AI policies

object[]

string

Base64-encoded video content

string

Cloud Storage URI of the generated video

string

Video MIME type (video/mp4)

Examples

Input

{
  "instances": [
    {
      "prompt": "a single red maple leaf falling onto still water, slow motion"
    }
  ],
  "parameters": {
    "durationSeconds": 4,
    "generateAudio": false,
    "sampleCount": 1
  }
}

Output

{
  "done": true,
  "name": "projects/example-project/locations/us-central1/publishers/google/models/veo-3.1-fast-generate-001/operations/1a2b3c4d",
  "response": {
    "@type": "type.googleapis.com/cloud.ai.large_models.vision.GenerateVideoResponse",
    "raiMediaFilteredCount": 0,
    "videos": [
      {
        "gcsUri": "https://storage.googleapis.com/EXAMPLE_BUCKET/veo/USER_ID/REQUEST_ID/sample_0.mp4",
        "mimeType": "video/mp4"
      }
    ]
  }
}

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. Use X-Comfy-Error-Type to classify a failure. 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

Find models, inspect schemas, and retry safely.

Limitations

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

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Specifications

Use Veo 3.1 Generate 001 with Comfy Router

Quick start

Schema

Input

Output

Examples

Input

Output

Before you ship

Headers

Using the Router API

Limitations

​Quick start

​Schema

​Input

​Output

​Examples

​Input

​Output

​Before you ship

Headers

Using the Router API

Limitations

Quick start

Schema

Input

Output

Examples

Input

Output

Before you ship