> ## 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 Eleven V4 with Comfy Router

> Call elevenlabs/eleven_v4 through Comfy Router: endpoint, request shape and the response Router returns.

API Reference for `elevenlabs/eleven_v4`, served by Comfy Router from Elevenlabs.

**Input:** Text · **Output:** 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:** `elevenlabs/eleven_v4`

**Endpoint:** `POST https://api.comfy.org/v2/models/elevenlabs/eleven_v4`

**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(
        "elevenlabs/eleven_v4",
        {
            "inputs": [
                {
                    "text": "Hello from Comfy Router.",
                    "voice_id": "21m00Tcm4TlvDq8ikWAM",
                },
            ],
        },
    )

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("elevenlabs/eleven_v4", {
  inputs: [
    {
      text: "Hello from Comfy Router.",
      voice_id: "21m00Tcm4TlvDq8ikWAM",
    },
  ],
});

console.log(data);
```

```bash cURL theme={null}
curl https://api.comfy.org/v2/models/elevenlabs/eleven_v4 \
  -H "X-API-Key: $COMFY_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d "{\"inputs\": [{\"text\":\"Hello from Comfy Router.\",\"voice_id\":\"21m00Tcm4TlvDq8ikWAM\"}]}"
```

**Queue and collect later**

The same body, sent to `POST https://api.comfy.org/v2/models/elevenlabs/eleven_v4/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(
            "elevenlabs/eleven_v4",
            {
                "inputs": [
                    {
                        "text": "Hello from Comfy Router.",
                        "voice_id": "21m00Tcm4TlvDq8ikWAM",
                    },
                ],
            },
        )
        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("elevenlabs/eleven_v4", {
  inputs: [
    {
      text: "Hello from Comfy Router.",
      voice_id: "21m00Tcm4TlvDq8ikWAM",
    },
  ],
});
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/elevenlabs/eleven_v4/requests \
  -H "X-API-Key: $COMFY_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d "{\"inputs\": [{\"text\":\"Hello from Comfy Router.\",\"voice_id\":\"21m00Tcm4TlvDq8ikWAM\"}]}"

# 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/elevenlabs/eleven_v4/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/elevenlabs/eleven_v4/requests/$REQUEST_ID \
  -H "X-API-Key: $COMFY_API_KEY"
```

## Schema

### Input

**apply\_text\_normalization** `string` (default: "auto")

Controls text normalization with three modes:
'auto' - system automatically decides whether to apply text normalization
'on' - text normalization will always be applied
'off' - text normalization will be skipped

Possible values: `auto`, `on`, `off`

**inputs** `object[]` *required*

A list of dialogue inputs, each containing text and a voice ID which will be converted into speech.
The maximum number of unique voice IDs is 10.

**inputs\[].text** `string` *required*

The text to be converted into speech.

**inputs\[].voice\_id** `string` *required*

The ID of the voice to be used for the generation.

**language\_code** `string`

Language code (ISO 639-1) used to enforce a language for the model and text normalization.
If the model does not support provided language code, an error will be returned.

**model\_id** `string`

Identifier of the model that will be used. This route admits
'eleven\_v3', 'eleven\_v4' and 'eleven\_v4\_turbo' and nothing else;
any other value is rejected with 400 before the request reaches
ElevenLabs.
The upstream ElevenLabs advice to query GET /v1/models for the
available set does NOT describe this route, which serves only these
models.
It is NOT in this schema's `required` list because Comfy Router
fills it from the `{model}` path segment of
/v2/models/elevenlabs/\{model}, so a Router caller omits it.

**pronunciation\_dictionary\_locators** `object[]`

A list of pronunciation dictionary locators (id, version\_id) to be applied to the text.
They will be applied in order. You may have up to 3 locators per request.

**pronunciation\_dictionary\_locators\[].pronunciation\_dictionary\_id** `string` *required*

The ID of the pronunciation dictionary

**pronunciation\_dictionary\_locators\[].version\_id** `string` *required*

The version ID of the pronunciation dictionary

**seed** `integer`

If specified, our system will make a best effort to sample deterministically.
Repeated requests with the same seed and parameters should return the same result.
Must be integer between 0 and 4294967295.

Range: `0` to `4294967295`

**settings** `object`

Settings controlling the dialogue generation

**settings.stability** `number` (default: 0.5)

Determines how stable the voice is and the randomness between each generation.
Lower values introduce broader emotional range for the voice.
Higher values can result in a monotonous voice with limited emotion.

Format: `double`

Generated from the schema Router serves at `GET /v2/models/elevenlabs/eleven_v4/openapi.json`, the same document it validates a call against before the request reaches the provider.

### Output

***/*** `string (binary)`

Raw audio bytes. The Content-Type and encoding follow the requested output\_format and are forwarded from ElevenLabs. The example is a placeholder for the binary body, not JSON or base64.

## Examples

### Input

```json theme={null}
{
  "inputs": [
    {
      "text": "Hello from Comfy Router.",
      "voice_id": "21m00Tcm4TlvDq8ikWAM"
    }
  ]
}
```

### Output

Binary body: raw bytes rather than a JSON document, returned as `*/*`, so there is no JSON example to show. The response `Content-Type` and encoding follow the request, as the Output schema above describes.

## 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).

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

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

> **[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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