---
title: Seedance Text-to-Video
url: https://runapi.ai/docs/api/seedance/text-to-video.md
canonical: https://runapi.ai/docs/api/seedance/text-to-video
locale: en
---

# Seedance Text-to-Video

## Overview

Create an asynchronous text-to-video task with a supported model. Use the returned task ID to retrieve its state, or provide callback_url for terminal delivery.

### Quick start

1. Create an API key and set it as RUNAPI_API_KEY.
2. Choose a supported model and send a POST request whose body matches that model's schema.
3. Store the returned task ID, then poll until a terminal state or handle the terminal callback.

## Endpoint

POST /api/v1/seedance/text_to_video

Base URL: https://runapi.ai

API version: v1

Authentication: Authorization: Bearer YOUR_API_TOKEN

## Supported models

Open a model page for current pricing, rate limits, and commercial-usage details.

- [seedance-1.5-pro](/models/seedance/1.5-pro)
- [seedance-2-mini](/models/seedance/2-mini)
- [seedance-2.0](/models/seedance/2.0)
- [seedance-2.0-fast](/models/seedance/2.0-fast)
- [seedance-v1-lite](/models/seedance/v1-lite)
- [seedance-v1-pro](/models/seedance/v1-pro)
- [seedance-v1-pro-fast](/models/seedance/v1-pro-fast)

## Request schema

Fields and allowed values depend on the selected model. When supplied, callback_url receives a terminal task delivery.

### seedance-1.5-pro

```json
{
  "aspect_ratio": {
    "enum": [
      "1:1",
      "4:3",
      "3:4",
      "16:9",
      "9:16",
      "21:9"
    ],
    "type": "string"
  },
  "callback_url": {
    "type": "string"
  },
  "duration_seconds": {
    "max": 12,
    "min": 4,
    "required": true,
    "type": "integer"
  },
  "enable_safety_checker": {
    "type": "boolean"
  },
  "generate_audio": {
    "type": "boolean"
  },
  "lock_camera": {
    "type": "boolean"
  },
  "model": {
    "type": "string"
  },
  "output_resolution": {
    "enum": [
      "480p",
      "720p",
      "1080p"
    ],
    "type": "string"
  },
  "prompt": {
    "type": "string"
  },
  "seed": {
    "max": 2147483647,
    "min": -1,
    "type": "integer"
  },
  "source_image_urls": {
    "max_items": 2,
    "type": "array"
  }
}
```

### seedance-2-mini

```json
{
  "aspect_ratio": {
    "enum": [
      "1:1",
      "4:3",
      "3:4",
      "16:9",
      "9:16",
      "21:9",
      "auto"
    ],
    "type": "string"
  },
  "callback_url": {
    "type": "string"
  },
  "duration_seconds": {
    "max": 15,
    "min": 4,
    "type": "integer"
  },
  "first_frame_image_url": {
    "type": "string"
  },
  "generate_audio": {
    "type": "boolean"
  },
  "last_frame_image_url": {
    "type": "string"
  },
  "model": {
    "type": "string"
  },
  "output_resolution": {
    "enum": [
      "480p",
      "720p"
    ],
    "type": "string"
  },
  "prompt": {
    "type": "string"
  },
  "reference_audio_urls": {
    "max_items": 3,
    "type": "array"
  },
  "reference_image_urls": {
    "max_items": 9,
    "type": "array"
  },
  "reference_video_urls": {
    "max_items": 3,
    "type": "array"
  },
  "web_search": {
    "type": "boolean"
  }
}
```

### seedance-2.0

```json
{
  "aspect_ratio": {
    "enum": [
      "1:1",
      "4:3",
      "3:4",
      "16:9",
      "9:16",
      "21:9",
      "auto"
    ],
    "type": "string"
  },
  "callback_url": {
    "type": "string"
  },
  "duration_seconds": {
    "max": 15,
    "min": 4,
    "type": "integer"
  },
  "enable_safety_checker": {
    "type": "boolean"
  },
  "first_frame_image_url": {
    "type": "string"
  },
  "generate_audio": {
    "type": "boolean"
  },
  "last_frame_image_url": {
    "type": "string"
  },
  "model": {
    "type": "string"
  },
  "output_resolution": {
    "enum": [
      "480p",
      "720p",
      "1080p",
      "4k"
    ],
    "type": "string"
  },
  "prompt": {
    "type": "string"
  },
  "reference_audio_urls": {
    "max_items": 3,
    "type": "array"
  },
  "reference_image_urls": {
    "max_items": 9,
    "type": "array"
  },
  "reference_video_urls": {
    "max_items": 3,
    "type": "array"
  },
  "web_search": {
    "type": "boolean"
  }
}
```

### seedance-2.0-fast

```json
{
  "aspect_ratio": {
    "enum": [
      "1:1",
      "4:3",
      "3:4",
      "16:9",
      "9:16",
      "21:9",
      "auto"
    ],
    "type": "string"
  },
  "callback_url": {
    "type": "string"
  },
  "duration_seconds": {
    "max": 15,
    "min": 4,
    "type": "integer"
  },
  "enable_safety_checker": {
    "type": "boolean"
  },
  "first_frame_image_url": {
    "type": "string"
  },
  "generate_audio": {
    "type": "boolean"
  },
  "last_frame_image_url": {
    "type": "string"
  },
  "model": {
    "type": "string"
  },
  "output_resolution": {
    "enum": [
      "480p",
      "720p"
    ],
    "type": "string"
  },
  "prompt": {
    "type": "string"
  },
  "reference_audio_urls": {
    "max_items": 3,
    "type": "array"
  },
  "reference_image_urls": {
    "max_items": 9,
    "type": "array"
  },
  "reference_video_urls": {
    "max_items": 3,
    "type": "array"
  },
  "web_search": {
    "type": "boolean"
  }
}
```

### seedance-v1-lite

```json
{
  "aspect_ratio": {
    "enum": [
      "1:1",
      "4:3",
      "3:4",
      "16:9",
      "9:16",
      "9:21"
    ],
    "type": "string"
  },
  "callback_url": {
    "type": "string"
  },
  "duration_seconds": {
    "enum": [
      5,
      10
    ],
    "required": true,
    "type": "integer"
  },
  "enable_safety_checker": {
    "type": "boolean"
  },
  "first_frame_image_url": {
    "type": "string"
  },
  "last_frame_image_url": {
    "type": "string"
  },
  "lock_camera": {
    "type": "boolean"
  },
  "model": {
    "type": "string"
  },
  "output_resolution": {
    "enum": [
      "480p",
      "720p",
      "1080p"
    ],
    "type": "string"
  },
  "prompt": {
    "type": "string"
  },
  "seed": {
    "type": "integer"
  }
}
```

### seedance-v1-pro

```json
{
  "aspect_ratio": {
    "enum": [
      "1:1",
      "4:3",
      "3:4",
      "16:9",
      "9:16",
      "21:9"
    ],
    "type": "string"
  },
  "callback_url": {
    "type": "string"
  },
  "duration_seconds": {
    "enum": [
      5,
      10
    ],
    "required": true,
    "type": "integer"
  },
  "enable_safety_checker": {
    "type": "boolean"
  },
  "first_frame_image_url": {
    "type": "string"
  },
  "lock_camera": {
    "type": "boolean"
  },
  "model": {
    "type": "string"
  },
  "output_resolution": {
    "enum": [
      "480p",
      "720p",
      "1080p"
    ],
    "type": "string"
  },
  "prompt": {
    "type": "string"
  },
  "seed": {
    "type": "integer"
  }
}
```

### seedance-v1-pro-fast

```json
{
  "callback_url": {
    "type": "string"
  },
  "duration_seconds": {
    "enum": [
      5,
      10
    ],
    "required": true,
    "type": "integer"
  },
  "enable_safety_checker": {
    "type": "boolean"
  },
  "first_frame_image_url": {
    "required": true,
    "type": "string"
  },
  "model": {
    "type": "string"
  },
  "output_resolution": {
    "enum": [
      "720p",
      "1080p"
    ],
    "type": "string"
  },
  "prompt": {
    "type": "string"
  },
  "seed": {
    "max": 2147483647,
    "min": -1,
    "type": "integer"
  }
}
```

## Create acceptance

HTTP 202 - POST /api/v1/seedance/text_to_video

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}
```

## Polling processing

HTTP 200 - GET /api/v1/seedance/text_to_video/:id

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "processing"
}
```

## Polling completed

HTTP 200 - GET /api/v1/seedance/text_to_video/:id

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}
```

## Polling failed

HTTP 200 - GET /api/v1/seedance/text_to_video/:id

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "error": "Task processing failed.",
  "id": "tsk_reference_demo",
  "status": "failed"
}
```

## Customer callback: completed

HTTP 200 - POST callback_url

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "id": "tsk_reference_demo",
  "status": "completed",
  "videos": [
    {
      "url": "https://file.runapi.ai/reference-video.mp4"
    }
  ]
}
```

## Customer callback: failed

HTTP 200 - POST callback_url

```json
{
  "billing": {
    "refund": null,
    "reservation": null,
    "settlement": null
  },
  "error": {
    "code": "generation_failed",
    "message": "Task processing failed."
  },
  "id": "tsk_reference_demo",
  "status": "failed"
}
```

## Errors

HTTP 400

```json
{
  "error": {
    "code": "invalid_request",
    "message": "A required request field is missing."
  }
}
```

## Generated Code Samples

Use cURL directly, or install an SDK for your language. Each sample submits the validated request shown in this reference.

### curl

```curl
curl -X POST https://runapi.ai/api/v1/seedance/text_to_video \
  -H 'Authorization: Bearer YOUR_API_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{"model":"seedance-1.5-pro","duration_seconds":5,"prompt":"A time-lapse of clouds moving over a mountain lake."}'
```

## Related Guides

- [Authentication](/docs/guides/authentication)
- [Task API quickstart](/docs/guides/task-api/quickstart)