> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-chore-sync-comfy-api-v2-spec.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Use Videos Lip Sync with Comfy Router

> Call kling/videos-lip-sync through Comfy Router: endpoint, request shape and the response Router returns.

API Reference for `kling/videos-lip-sync`, served by Comfy Router from Kling.

## Quick start

Create a key at [platform.comfy.org/profile/api-keys](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:** `kling/videos-lip-sync`

**Endpoint:** `POST https://api.comfy.org/v2/models/kling/videos-lip-sync`

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

  # Reads COMFY_API_KEY from the environment. Each call sends a fresh
  # Idempotency-Key and waits up to 10 minutes for the finished result.
  with Comfy() as client:
      result = client.models.run(
          "kling/videos-lip-sync",
          {
              "input": {
                  "mode": "text2video",
                  "text": "Welcome to Comfy Cloud.",
                  "video_id": "kling-video-6f5e4d3c2b1a",
                  "voice_id": "genshin_vindi2",
                  "voice_language": "en",
                  "voice_speed": 1,
              },
          },
      )

  print(result)
  ```

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

  // Reads COMFY_API_KEY from the environment. Each call sends a fresh
  // Idempotency-Key and waits up to 10 minutes for the finished result.
  const { data } = await comfy.models.run("kling/videos-lip-sync", {
    input: {
      mode: "text2video",
      text: "Welcome to Comfy Cloud.",
      video_id: "kling-video-6f5e4d3c2b1a",
      voice_id: "genshin_vindi2",
      voice_language: "en",
      voice_speed: 1,
    },
  });

  console.log(data);
  ```

  ```bash cURL theme={null}
  curl https://api.comfy.org/v2/models/kling/videos-lip-sync \
    -H "X-API-Key: $COMFY_API_KEY" \
    -H "Idempotency-Key: $(uuidgen)" \
    -H "Content-Type: application/json" \
    -d "{\"input\": {\"mode\":\"text2video\",\"text\":\"Welcome to Comfy Cloud.\",\"video_id\":\"kling-video-6f5e4d3c2b1a\",\"voice_id\":\"genshin_vindi2\",\"voice_language\":\"en\",\"voice_speed\":1}}"
  ```
</CodeGroup>

## Schema

### Input

<ParamField body="callback_url" type="string (uri)">
  The callback notification address. Server will notify when the task status changes.

  Format: `uri`
</ParamField>

<ParamField body="input" type="object | object | object | object | object | object" required />

<ParamField body="input.audio_file" type="string">
  Local Path of Audio File. Supported formats: .mp3/.wav/.m4a/.aac, maximum file size of 5MB. Base64 code.
</ParamField>

<ParamField body="input.audio_type" type="string">
  Method of Transmitting Audio Files for Lip-Sync. Required when mode is audio2video.

  Possible values: `file`, `url`
</ParamField>

<ParamField body="input.audio_url" type="string">
  Audio File Download URL. Supported formats: .mp3/.wav/.m4a/.aac, maximum file size of 5MB.
</ParamField>

<ParamField body="input.mode" type="string" required>
  Video Generation Mode. text2video: Text-to-video generation mode; audio2video: Audio-to-video generation mode

  Possible values: `text2video`, `audio2video`
</ParamField>

<ParamField body="input.text" type="string">
  Text Content for Lip-Sync Video Generation. Required when mode is text2video. Maximum length is 120 characters.
</ParamField>

<ParamField body="input.video_id" type="string">
  The ID of the video generated by Kling AI. Only supports 5-second and 10-second videos generated within the last 30 days.
</ParamField>

<ParamField body="input.video_url" type="string">
  Get link for uploaded video. Video files support .mp4/.mov, file size does not exceed 100MB, video length between 2-10s.
</ParamField>

<ParamField body="input.voice_id" type="string">
  Voice ID. Required when mode is text2video. The system offers a variety of voice options to choose from.
</ParamField>

<ParamField body="input.voice_language" type="string" default="&#x22;en&#x22;">
  The voice language corresponds to the Voice ID.

  Possible values: `zh`, `en`
</ParamField>

<ParamField body="input.voice_speed" type="number" default="1">
  Speech Rate. Valid range: 0.8\~2.0, accurate to one decimal place.

  Range: `0.8` to `2`
</ParamField>

Generated from the schema Router serves at `GET /v2/models/kling/videos-lip-sync/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

```json theme={null}
{
  "input": {
    "mode": "text2video",
    "text": "Welcome to Comfy Cloud.",
    "video_id": "kling-video-6f5e4d3c2b1a",
    "voice_id": "genshin_vindi2",
    "voice_language": "en",
    "voice_speed": 1
  }
}
```

## Before you ship

The snippets above are the shortest working call. Three things are the same for every model and are documented once on the [Comfy Router headers](/development/comfy-router/headers) page: send an `Idempotency-Key` on every paid call and reuse it when you retry, expect the connection to be held up to Router's 10 minute deadline, and keep `X-Comfy-Request-Id` from every response. The SDKs do all three for you; the cURL tab does none of them. On failure, `X-Comfy-Error-Type` names the bucket, and a `422` means the body failed the model's schema and was never billed.

<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="Quick Start" icon="rocket" href="/development/comfy-router/quickstart">
    Typed error handling in Python and TypeScript, reading the 422, walking the catalog.
  </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>