ByteDance · Model API

Seedance V1 API

Seedance V1 API with VezAPI. Explore model capabilities, credit pricing, request parameters, and integration examples.

Text to VideoImage to Video

Seedance V1 API documentation

Integrate Seedance V1 with your VezAPI key. The operations below share the same authentication and account balance.

Base URL: https://api.vezapi.com
Send Authorization: Bearer YOUR_VEZAPI_KEY. Use a unique Idempotency-Key for each submission; reuse it only when checking the same request.

Bytedance - V1 Lite Image to Video

POST/api/v1/jobs/createTask

Model IDs: bytedance/v1-lite-image-to-video

Parameter	Type	Description & constraints
`model` required	`string`	The model name to use for generation. Required field. - Must be `bytedance/v1-lite-image-to-video` for this endpoint Values: `"bytedance/v1-lite-image-to-video"` Default: `"bytedance/v1-lite-image-to-video"`
`callBackUrl` optional	`string`	The URL to receive generation task completion updates. Optional but recommended for production use. - System will POST task status and results to this URL when generation completes - Callback includes generated content URLs and task information - Your callback endpoint should accept POST requests with JSON payload containing results - Alternatively, use the Get Task Details endpoint to poll task status - To ensure callback security, see [Webhook Verification Guide](/common-api/webhook-verification) for signature verification implementation
`input` optional	`object`	Input parameters for the generation task
`input.prompt` required	`string`	The text prompt used to generate the video (Max length: 10000 characters) `maxLength: 10000`
`input.image_url` required	`string`	The URL of the image used to generate video (File URL after upload, not file content; Accepted types: image/jpeg, image/png, image/webp; Max size: 10.0MB)
`input.resolution` optional	`string`	Video resolution - 480p for faster generation, 720p for higher quality Values: `"480p", "720p", "1080p"` Default: `"720p"`
`input.duration` optional	`string`	Duration of the video in seconds Values: `"5", "10"` Default: `"5"`
`input.camera_fixed` optional	`boolean`	Whether to fix the camera position (Boolean value (true/false))
`input.seed` optional	`number`	Random seed to control video generation. Use -1 for random. (Min: -1, Max: 2147483647, Step: 1) (step: 1) Default: `-1` `minimum: -1` `maximum: 2147483647`
`input.enable_safety_checker` optional	`boolean`	The safety checker is always enabled in Playground. It can only be disabled by setting false through the API. (Boolean value (true/false))
`input.end_image_url` optional	`string`	The URL of the image the video ends with. Defaults to None. (File URL after upload, not file content; Accepted types: image/jpeg, image/png, image/webp; Max size: 10.0MB)
`input.nsfw_checker` optional	`boolean`	Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model.

Request example

curl -X POST 'https://api.vezapi.com/api/v1/jobs/createTask' \
  -H 'Authorization: Bearer YOUR_VEZAPI_KEY' \
  -H 'Idempotency-Key: your-unique-request-id' \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "bytedance/v1-lite-image-to-video",
  "input": {
    "prompt": "Multiple shots. A traveler crosses an endless desert toward a glowing archway. [Cut to] His cloak whips in the wind as he reaches the massive stone threshold. [Wide shot] He steps through — and vanishes into a burst of light",
    "image_url": "https://example.com/input.png",
    "resolution": "720p",
    "duration": "5"
  }
}'

Responses and errors

HTTP 200

Request successful

Parameter	Type	Description & constraints
`code` optional	`integer`	Status code of the request. The HTTP status is 200 even when the request fails, so always check this field: 200 means success; any other value means the request failed and msg describes the reason. Common values: 401 invalid or missing API key; 402 insufficient credits; 429 rate limit exceeded; 422 or 500 the request could not be processed (read msg and check your parameters before retrying). Values: `200, 401, 402, 404, 422, 429, 433, 455, 500, 501, 505`
`msg` optional	`string`	Response message, error description upon failure
`data` required	`object`
`data.taskId` required	`string`	The task ID can be used with the "Get Task Details" endpoint to query the task status.

Bytedance - V1 Lite Text to Video

POST/api/v1/jobs/createTask

Model IDs: bytedance/v1-lite-text-to-video

Parameter	Type	Description & constraints
`model` required	`string`	The model name to use for generation. Required field. - Must be `bytedance/v1-lite-text-to-video` for this endpoint Values: `"bytedance/v1-lite-text-to-video"` Default: `"bytedance/v1-lite-text-to-video"`
`callBackUrl` optional	`string`	The URL to receive generation task completion updates. Optional but recommended for production use. - System will POST task status and results to this URL when generation completes - Callback includes generated content URLs and task information - Your callback endpoint should accept POST requests with JSON payload containing results - Alternatively, use the Get Task Details endpoint to poll task status - To ensure callback security, see [Webhook Verification Guide](/common-api/webhook-verification) for signature verification implementation
`input` optional	`object`	Input parameters for the generation task
`input.prompt` required	`string`	The text prompt used to generate the video (Max length: 10000 characters) `maxLength: 10000`
`input.aspect_ratio` optional	`string`	The aspect ratio of the generated video Values: `"16:9", "4:3", "1:1", "3:4", "9:16", "9:21"` Default: `"16:9"`
`input.resolution` optional	`string`	Video resolution - 480p for faster generation, 720p for higher quality Values: `"480p", "720p", "1080p"` Default: `"720p"`
`input.duration` optional	`string`	Duration of the video in seconds Values: `"5", "10"` Default: `"5"`
`input.camera_fixed` optional	`boolean`	Whether to fix the camera position (Boolean value (true/false))
`input.seed` optional	`integer`	Random seed to control video generation. Use -1 for random.
`input.enable_safety_checker` optional	`boolean`	The safety checker is always enabled in Playground. It can only be disabled by setting false through the API. (Boolean value (true/false))
`input.nsfw_checker` optional	`boolean`	Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model.

Request example

curl -X POST 'https://api.vezapi.com/api/v1/jobs/createTask' \
  -H 'Authorization: Bearer YOUR_VEZAPI_KEY' \
  -H 'Idempotency-Key: your-unique-request-id' \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "bytedance/v1-lite-text-to-video",
  "input": {
    "prompt": "Wide-angle shot: A serene sailing boat gently sways in the harbor at dawn, surrounded by soft Impressionist hues of pink and orange with ivory accents. The camera slowly pans across the scene, capturing the delicate reflections on the water and the intricate details of the boat'\''s sails as the light gradually brightens.",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": "5"
  }
}'

Responses and errors

HTTP 200

Request successful

Parameter	Type	Description & constraints
`code` optional	`integer`	Status code of the request. The HTTP status is 200 even when the request fails, so always check this field: 200 means success; any other value means the request failed and msg describes the reason. Common values: 401 invalid or missing API key; 402 insufficient credits; 429 rate limit exceeded; 422 or 500 the request could not be processed (read msg and check your parameters before retrying). Values: `200, 401, 402, 404, 422, 429, 433, 455, 500, 501, 505`
`msg` optional	`string`	Response message, error description upon failure
`data` required	`object`
`data.taskId` required	`string`	The task ID can be used with the "Get Task Details" endpoint to query the task status.

Bytedance V1 Pro Fast Image to Video

POST/api/v1/jobs/createTask

Model IDs: bytedance/v1-pro-fast-image-to-video

Parameter	Type	Description & constraints
`model` required	`string`	The model name to use for generation. Required field. - Must be `bytedance/v1-pro-fast-image-to-video` for this endpoint Values: `"bytedance/v1-pro-fast-image-to-video"` Default: `"bytedance/v1-pro-fast-image-to-video"`
`callBackUrl` optional	`string`	The URL to receive generation task completion updates. Optional but recommended for production use. - System will POST task status and results to this URL when generation completes - Callback includes generated content URLs and task information - Your callback endpoint should accept POST requests with JSON payload containing results - Alternatively, use the Get Task Details endpoint to poll task status - To ensure callback security, see [Webhook Verification Guide](/common-api/webhook-verification) for signature verification implementation
`input` optional	`object`	Input parameters for the generation task
`input.prompt` required	`string`	The text prompt used to generate the video (Max length: 10000 characters) `maxLength: 10000`
`input.image_url` required	`string`	The URL of the image used to generate video (File URL after upload, not file content; Accepted types: image/jpeg, image/png, image/webp; Max size: 10.0MB)
`input.resolution` optional	`string`	Output resolution: 720p or 1080p. Values: `"720p", "1080p"` Default: `"720p"`
`input.duration` optional	`string`	Duration of the video in seconds Values: `"5", "10"` Default: `"5"`
`input.nsfw_checker` optional	`boolean`	Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model.

Request example

curl -X POST 'https://api.vezapi.com/api/v1/jobs/createTask' \
  -H 'Authorization: Bearer YOUR_VEZAPI_KEY' \
  -H 'Idempotency-Key: your-unique-request-id' \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "bytedance/v1-pro-fast-image-to-video",
  "input": {
    "prompt": "A cinematic close-up sequence of a single elegant ceramic coffee cup with saucer on a rustic wooden table near a sunlit window, hot rich espresso poured in a thin golden stream from above, gradually filling the cup in distinct stages: empty with faint steam, 1/4 filled with dark crema, half-filled with swirling coffee and rising steam, 3/4 filled nearing the rim, perfectly full just below overflow with glossy surface and soft bokeh highlights; ultra-realistic, warm golden-hour light, shallow depth of field, photorealism, detailed textures, subtle steam wisps, serene inviting atmosphere --ar 16:9 --q 2 --style raw",
    "image_url": "https://example.com/input.png",
    "resolution": "720p",
    "duration": "5"
  }
}'

Responses and errors

HTTP 200

Request successful

Parameter	Type	Description & constraints
`code` optional	`integer`	Status code of the request. The HTTP status is 200 even when the request fails, so always check this field: 200 means success; any other value means the request failed and msg describes the reason. Common values: 401 invalid or missing API key; 402 insufficient credits; 429 rate limit exceeded; 422 or 500 the request could not be processed (read msg and check your parameters before retrying). Values: `200, 401, 402, 404, 422, 429, 433, 455, 500, 501, 505`
`msg` optional	`string`	Response message, error description upon failure
`data` required	`object`
`data.taskId` required	`string`	The task ID can be used with the "Get Task Details" endpoint to query the task status.

Bytedance V1 Pro Image to Video

POST/api/v1/jobs/createTask

Model IDs: bytedance/v1-pro-image-to-video

Parameter	Type	Description & constraints
`model` required	`string`	The model name to use for generation. Required field. - Must be `bytedance/v1-pro-image-to-video` for this endpoint Values: `"bytedance/v1-pro-image-to-video"` Default: `"bytedance/v1-pro-image-to-video"`
`callBackUrl` optional	`string`	The URL to receive generation task completion updates. Optional but recommended for production use. - System will POST task status and results to this URL when generation completes - Callback includes generated content URLs and task information - Your callback endpoint should accept POST requests with JSON payload containing results - Alternatively, use the Get Task Details endpoint to poll task status - To ensure callback security, see [Webhook Verification Guide](/common-api/webhook-verification) for signature verification implementation
`input` optional	`object`	Input parameters for the generation task
`input.prompt` required	`string`	The text prompt used to generate the video (Max length: 10000 characters) `maxLength: 10000`
`input.image_url` required	`string`	The URL of the image used to generate video (File URL after upload, not file content; Accepted types: image/jpeg, image/png, image/webp; Max size: 10.0MB)
`input.resolution` optional	`string`	Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality Values: `"480p", "720p", "1080p"` Default: `"720p"`
`input.duration` optional	`string`	Duration of the video in seconds Values: `"5", "10"` Default: `"5"`
`input.camera_fixed` optional	`boolean`	Whether to fix the camera position (Boolean value (true/false))
`input.seed` optional	`number`	Random seed to control video generation. Use -1 for random. (Min: -1, Max: 2147483647, Step: 1) (step: 1) Default: `-1` `minimum: -1` `maximum: 2147483647`
`input.enable_safety_checker` optional	`boolean`	The safety checker is always enabled in Playground. It can only be disabled by setting false through the API. (Boolean value (true/false))
`input.nsfw_checker` optional	`boolean`	Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model.

Request example

curl -X POST 'https://api.vezapi.com/api/v1/jobs/createTask' \
  -H 'Authorization: Bearer YOUR_VEZAPI_KEY' \
  -H 'Idempotency-Key: your-unique-request-id' \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "bytedance/v1-pro-image-to-video",
  "input": {
    "prompt": "A golden retriever dashing through shallow surf at the beach, back angle camera low near waterline, splashes frozen in time, blur trails in waves and paws, afternoon sun glinting off wet fur, overcast day, dramatic clouds",
    "image_url": "https://example.com/input.png",
    "resolution": "720p",
    "duration": "5"
  }
}'

Responses and errors

HTTP 200

Request successful

Parameter	Type	Description & constraints
`code` optional	`integer`	Status code of the request. The HTTP status is 200 even when the request fails, so always check this field: 200 means success; any other value means the request failed and msg describes the reason. Common values: 401 invalid or missing API key; 402 insufficient credits; 429 rate limit exceeded; 422 or 500 the request could not be processed (read msg and check your parameters before retrying). Values: `200, 401, 402, 404, 422, 429, 433, 455, 500, 501, 505`
`msg` optional	`string`	Response message, error description upon failure
`data` required	`object`
`data.taskId` required	`string`	The task ID can be used with the "Get Task Details" endpoint to query the task status.

Bytedance - V1 Pro Text to Video

POST/api/v1/jobs/createTask

Model IDs: bytedance/v1-pro-text-to-video

Parameter	Type	Description & constraints
`model` required	`string`	The model name to use for generation. Required field. - Must be `bytedance/v1-pro-text-to-video` for this endpoint Values: `"bytedance/v1-pro-text-to-video"` Default: `"bytedance/v1-pro-text-to-video"`
`callBackUrl` optional	`string`	The URL to receive generation task completion updates. Optional but recommended for production use. - System will POST task status and results to this URL when generation completes - Callback includes generated content URLs and task information - Your callback endpoint should accept POST requests with JSON payload containing results - Alternatively, use the Get Task Details endpoint to poll task status - To ensure callback security, see [Webhook Verification Guide](/common-api/webhook-verification) for signature verification implementation
`input` optional	`object`	Input parameters for the generation task
`input.prompt` required	`string`	The text prompt used to generate the video (Max length: 10000 characters) `maxLength: 10000`
`input.aspect_ratio` optional	`string`	The aspect ratio of the generated video Values: `"21:9", "16:9", "4:3", "1:1", "3:4", "9:16"` Default: `"16:9"`
`input.resolution` optional	`string`	Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality Values: `"480p", "720p", "1080p"` Default: `"720p"`
`input.duration` optional	`string`	Duration of the video in seconds Values: `"5", "10"` Default: `"5"`
`input.camera_fixed` optional	`boolean`	Whether to fix the camera position (Boolean value (true/false))
`input.seed` optional	`number`	Random seed to control video generation. Use -1 for random. (Min: -1, Max: 2147483647, Step: 1) (step: 1) Default: `-1` `minimum: -1` `maximum: 2147483647`
`input.enable_safety_checker` optional	`boolean`	The safety checker is always enabled in Playground. It can only be disabled by setting false through the API. (Boolean value (true/false))
`input.nsfw_checker` optional	`boolean`	Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model.

Request example

curl -X POST 'https://api.vezapi.com/api/v1/jobs/createTask' \
  -H 'Authorization: Bearer YOUR_VEZAPI_KEY' \
  -H 'Idempotency-Key: your-unique-request-id' \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "bytedance/v1-pro-text-to-video",
  "input": {
    "prompt": "A boy with curly hair and a backpack rides a bike down a golden-lit rural road at sunset.\n[Cut to] He slows down and looks toward a field of tall grass.\n[Wide shot] His silhouette halts in the orange haze.",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": "5"
  }
}'

Responses and errors

HTTP 200

Request successful

Parameter	Type	Description & constraints
`code` optional	`integer`	Status code of the request. The HTTP status is 200 even when the request fails, so always check this field: 200 means success; any other value means the request failed and msg describes the reason. Common values: 401 invalid or missing API key; 402 insufficient credits; 429 rate limit exceeded; 422 or 500 the request could not be processed (read msg and check your parameters before retrying). Values: `200, 401, 402, 404, 422, 429, 433, 455, 500, 501, 505`
`msg` optional	`string`	Response message, error description upon failure
`data` required	`object`
`data.taskId` required	`string`	The task ID can be used with the "Get Task Details" endpoint to query the task status.

Task status and callbacks

For asynchronous tasks, keep the returned taskId. Query GET /api/v1/jobs/recordInfo?taskId=... or provide callBackUrl when creating the task. Only the account that created a task can access it or derive new resources from it.

A timeout can mean the submission was accepted. Inspect the existing request in your dashboard; do not create another task automatically. Callback delivery is retried and may arrive more than once. Deduplicate with X-VezAPI-Event-Id.

Files, logs and billing

Generated media normally follows a 14-day provider lifetime; uploaded files expire after 24 hours. Save the files you need before expiration. VezAPI streams registered files without keeping a permanent media library. Request logs are retained for two calendar months.

Credits are reserved before submission. Final deductions match actual discounted consumption one for one. Unknown usage pauses new paid requests. If available funds cannot cover final usage while protecting other reservations, settlement stays pending until funded; model usage cannot make the wallet negative. Time-based inputs require server-side metadata reads; a failed read prevents submission.

Open full documentation →

Send a request using your VezAPI key. Successful generations use your account credits.

VezAPI API Key

POST/api/v1/jobs/createTask

Request body

{
  "model": "bytedance/v1-lite-image-to-video",
  "input": {
    "prompt": "Multiple shots. A traveler crosses an endless desert toward a glowing archway. [Cut to] His cloak whips in the wind as he reaches the massive stone threshold. [Wide shot] He steps through — and vanishes into a burst of light",
    "image_url": "https://example.com/input.png",
    "resolution": "720p",
    "duration": "5"
  }
}

Response

Your response will appear here.

Seedance V1 API pricing

Rates below are reference estimates; final deductions equal actual discounted consumption, one for one. At the standard pack rate, 1,000 credits ≈ $10. Larger packs reduce the effective credit price.

Specification	Credits	Unit	USD reference
bytedance/seedance-v1-lite, text-to-video, 1080p	10	per second	$0.1
bytedance/seedance-v1-lite, text-to-video, 720p	4.5	per second	$0.045
bytedance/seedance-v1-lite, text-to-video, 480p	2	per second	$0.02
bytedance/seedance-v1-lite, image-to-video, 1080p	10	per second	$0.1
bytedance/seedance-v1-lite, image-to-video, 720p	4.5	per second	$0.045
bytedance/seedance-v1-lite, image-to-video, 480p	2	per second	$0.02
bytedance/seedance-v1-pro-fast, image-to-video, 1080p-10s	72	per video	$0.72
bytedance/seedance-v1-pro-fast, image-to-video, 1080p-5s	36	per video	$0.36
bytedance/seedance-v1-pro-fast, image-to-video, 720p-10s	36	per video	$0.36
bytedance/seedance-v1-pro-fast, image-to-video, 720p-5s	16	per video	$0.16
bytedance/seedance-v1-pro, text-to-video, 1080p	14	per second	$0.14
bytedance/seedance-v1-pro, text-to-video, 720p	6	per second	$0.06
bytedance/seedance-v1-pro, text-to-video, 480p	2.8	per second	$0.028
bytedance/seedance-v1-pro, image-to-video, 1080p	14	per second	$0.14
bytedance/seedance-v1-pro, image-to-video, 720p	6	per second	$0.06
bytedance/seedance-v1-pro, image-to-video, 480p	2.8	per second	$0.028