> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Pika Soundtrack with Comfy Router

> Call pika/pika-soundtrack through Comfy Router: endpoint, request shape and the response Router returns.

API Reference for `pika/pika-soundtrack`, served by Comfy Router from Pika.

**Input:** Video, Text · **Output:** Video + Audio

## Quick start

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

**Model ID:** `pika/pika-soundtrack`

**Endpoint:** `POST https://api.comfy.org/v2/models/pika/pika-soundtrack`

> [tab] Wait for the result
>
> ```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(
>         "pika/pika-soundtrack",
>         {
>             "seed": -1,
>             "video": "https://cdn.pika.art/v2/media/uploads/a7112d4d-62ed-4a11-8dee-74e89c2ec037/ae79aabfd458427495cf462f49e1cecc.mp4",
>         },
>     )
>
> 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("pika/pika-soundtrack", {
>   seed: -1,
>   video: "https://cdn.pika.art/v2/media/uploads/a7112d4d-62ed-4a11-8dee-74e89c2ec037/ae79aabfd458427495cf462f49e1cecc.mp4",
> });
>
> console.log(data);
> ```
>
> ```bash cURL theme={null}
> curl https://api.comfy.org/v2/models/pika/pika-soundtrack \
>   -H "X-API-Key: $COMFY_API_KEY" \
>   -H "Idempotency-Key: $(uuidgen)" \
>   -H "Content-Type: application/json" \
>   -d "{\"seed\": -1, \"video\": \"https://cdn.pika.art/v2/media/uploads/a7112d4d-62ed-4a11-8dee-74e89c2ec037/ae79aabfd458427495cf462f49e1cecc.mp4\"}"
> ```

> [tab] Queue and collect later
>
> The same body, sent to `POST https://api.comfy.org/v2/models/pika/pika-soundtrack/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](https://docs.comfy.org/development/comfy-router/queue.md) walks through status, cancellation and collection.
>
> ```python Python theme={null}
> import asyncio
> from comfy_sdk import AsyncComfy
>
> # Reads COMFY_API_KEY from the environment.
> # Each submit() call mints its own Idempotency-Key and reuses it for automatic retries.
> async def main():
>     async with AsyncComfy() as client:
>         handle = await client.models.submit(
>             "pika/pika-soundtrack",
>             {
>                 "seed": -1,
>                 "video": "https://cdn.pika.art/v2/media/uploads/a7112d4d-62ed-4a11-8dee-74e89c2ec037/ae79aabfd458427495cf462f49e1cecc.mp4",
>             },
>         )
>         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.
>         async 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 = await handle.get()
>
>     print(result)
>
> asyncio.run(main())
> ```
>
> ```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("pika/pika-soundtrack", {
>   seed: -1,
>   video: "https://cdn.pika.art/v2/media/uploads/a7112d4d-62ed-4a11-8dee-74e89c2ec037/ae79aabfd458427495cf462f49e1cecc.mp4",
> });
> 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/pika/pika-soundtrack/requests \
>   -H "X-API-Key: $COMFY_API_KEY" \
>   -H "Idempotency-Key: $(uuidgen)" \
>   -H "Content-Type: application/json" \
>   -d "{\"seed\": -1, \"video\": \"https://cdn.pika.art/v2/media/uploads/a7112d4d-62ed-4a11-8dee-74e89c2ec037/ae79aabfd458427495cf462f49e1cecc.mp4\"}"
>
> # 2. Poll until status is COMPLETED, waiting the Retry-After seconds each response names.
> REQUEST_ID="<request_id from the 201 body>"
> curl -i https://api.comfy.org/v2/models/pika/pika-soundtrack/requests/$REQUEST_ID/status \
>   -H "X-API-Key: $COMFY_API_KEY"
>
> # 3. Collect. 200 with the model's native output, 202 with the status body while it is still running.
> curl https://api.comfy.org/v2/models/pika/pika-soundtrack/requests/$REQUEST_ID \
>   -H "X-API-Key: $COMFY_API_KEY"
> ```

## Schema

### Input

**instruction** `string`

What the audio should be and how it follows the action. Omit it for sound design from the video alone.

**seed** `integer` (default: -1)

Seed from -1 to 2147483647. -1 picks a random seed.

Range: `-1` to `2147483647`

**video** `string` *required*

URL of the source video, H.264 or HEVC, at most 1200 seconds and 2 GB.

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

### Output

**error** `object`

Set on a `failed` job.

**error.code** `string`

Machine-readable failure code, such as invalid\_input, content\_moderation or provider\_error.

**error.message** `string`

Diagnostic text.

**id** `string`

Job id used to poll for status.

**model\_id** `string`

The Pika catalog entry the job ran.

**output** `object`

The finished job's media, set when `status` is `completed`.

**output.audio** `object`

One generated media file.

**output.audio.content\_type** `string`

MIME type of the file.

**output.audio.url** `string`

Download URL of the generated file.

**output.media\_type** `string`

Which field carries the file: video or audio.

**output.video** `object`

One generated media file.

**output.video.content\_type** `string`

MIME type of the file.

**output.video.url** `string`

Download URL of the generated file.

**status** `string`

Job status: queued, running, completed or failed.

**usage** `object`

Units Pika reported for the job.

## Examples

### Input

```json theme={null}
{
  "seed": -1,
  "video": "https://cdn.pika.art/v2/media/uploads/a7112d4d-62ed-4a11-8dee-74e89c2ec037/ae79aabfd458427495cf462f49e1cecc.mp4"
}
```

### Output

```json theme={null}
{
  "id": "media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0",
  "output": {
    "media_type": "video",
    "video": {
      "content_type": "video/mp4",
      "url": "https://example.invalid/pika/video.mp4"
    }
  },
  "status": "completed"
}
```

## 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, and a `413` means the request body was larger than Router accepts. Download generated assets promptly because [result URLs can expire](https://docs.comfy.org/development/comfy-router/reference.md#result-assets).

Any size limit named in a field description above is the provider's own bound on that field, quoted from the provider's specification. Router applies a separate cap to the whole request body, which base64-encoded media counts against: see [request body size](https://docs.comfy.org/development/comfy-router/limitations.md#request-bodies-are-capped).

This page documents one partner model called through Comfy Router. The same `comfy-sdk` / `@comfyorg/sdk` package also ships a second client, for running a whole ComfyUI workflow graph on Comfy Cloud: `Comfy(api_key=...)` / `new Comfy({ apiKey })`, with `client.workflows`, `client.assets` and `client.jobs`. See [Comfy SDKs](https://docs.comfy.org/development/api-development/sdks.md).

> [card] [Headers](https://docs.comfy.org/development/comfy-router/headers.md)
>
> Authentication, idempotency, request IDs, error buckets, retry pacing, spend limits.

> [card] [Using the Router API](https://docs.comfy.org/development/comfy-router/api.md)
>
> Model discovery, validation errors, retries, and billing.

> [card] [Limitations](https://docs.comfy.org/development/comfy-router/limitations.md)
>
> What Router does not do today, and what to use instead.


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