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Text to VideoImage to Video

Kling 2.1 Master · Text to Video

Generate a video from a text prompt with selectable aspect ratio, duration, negative guidance, and CFG scale.

Developer API pricing

Provider: SeeAPI

USD estimate: $0.0037 / credit · Estimated equivalent, not an additional charge.

5s: 220 credits/gen (≈ $0.82/gen)

10s: 440 credits/gen (≈ $1.65/gen)

Query Task Status

After submitting a task, use the unified query endpoint to check progress and retrieve results:

Get Task DetailsLearn how to query task status and retrieve generation results

Related Resources

Market Overview

Explore all available models

Credits & Billing

View credit balance, plans, and billing activity

Usage

Review API usage and credit consumption

Callbacks

Manage the secret used to verify generation webhook signatures. Callback URLs are supplied when you create each generation.

Webhook flow

Callback URL per generation.

Webhook signing key

Request

POST/v1/generations
AuthorizationSend your API key in the Authorization header using the Bearer scheme.Authorization: Bearer ****************

Header Params

stringrequired

A unique key for this generation request. Reuse the same value only when retrying the identical request body.

max length: 255
Example:
order-20260818-001

Body Params

application/json
stringrequired

The public model ID documented on this page. Use kling-v2-1-master for this Endpoint.

Allowed:kling-v2-1-master
Default:
kling-v2-1-master
Example:
kling-v2-1-master
stringrequired

The public Endpoint ID for the selected model. Use the Endpoint whose input schema matches this request.

Allowed:text-to-video
Default:
text-to-video
Example:
text-to-video
stringoptional

Optional public Provider ID. Omit this field to use the Endpoint's default Provider.

Allowed:seeapi
Default:
seeapi
Example:
seeapi
objectrequired

Provider-specific input object. Its accepted fields and validation rules depend on the selected provider.

Provider parameters

SeeAPIseeapiDefault Provider
stringrequired

Describe the subject, scene, action, visual style, camera behavior, and other details to generate.

max length: 5000
Example:
A cinematic city at night
stringoptional

Select the output video aspect ratio.

Allowed:16:99:161:1
Default:
16:9
numberoptional

Select the generated video duration.

Allowed:510
Default:
5
stringoptional

Describe elements the model should avoid in the generated video.

max length: 500
numberoptional

Control how closely the generated video follows the prompt.

min: 0max: 1
Default:
0.5
string <uri>optional

Optional absolute HTTPS URL that receives terminal generation updates. If omitted, query the task-details endpoint with the returned generation ID.

max length: 2048
Example:
https://client.example.com/webhooks/seeapi

Responses

202Generation accepted and processing
Bodyapplication/json
objectrequired
stringrequired
Example:
task_xxx
stringrequired
Example:
kling-v2-1-master
stringrequired
Example:
text-to-video
stringrequired
Allowed:seeapi
  • seeapi: SeeAPI
Example:
seeapi
stringrequired
Allowed:processing
Example:
processing
numberrequired

Estimated public credits. Values can include up to three decimal places.

Example:
220
numberrequired

Consumed public credits, with up to three decimal places.

Example:
0
numberrequired

Refunded public credits, with up to three decimal places.

Example:
0
string <date-time>required
Example:
2026-08-18T10:00:00Z
string <date-time>required
Example:
2026-08-18T10:00:00Z
booleanrequired

Whether this response is an idempotent replay of an earlier request.

Example:
false
200Idempotent replay of an existing generation request
Bodyapplication/json
objectrequired
stringrequired
Example:
task_xxx
stringrequired
Example:
kling-v2-1-master
stringrequired
Example:
text-to-video
stringrequired
Allowed:seeapi
  • seeapi: SeeAPI
Example:
seeapi
stringrequired
Allowed:processing
Example:
processing
numberrequired

Estimated public credits. Values can include up to three decimal places.

Example:
220
numberrequired

Consumed public credits, with up to three decimal places.

Example:
0
numberrequired

Refunded public credits, with up to three decimal places.

Example:
0
string <date-time>required
Example:
2026-08-18T10:00:00Z
string <date-time>required
Example:
2026-08-18T10:00:00Z
booleanrequired

Whether this response is an idempotent replay of an earlier request.

Example:
false
400

Invalid JSON, parameters, Schema, or API Policy

401

Invalid API Key or authentication failed

402

Insufficient credits

403

The current request is not allowed

404

Model, Endpoint, or task not found

409

Idempotency conflict or the same request is still being created

413

Request body is too large

429

Too many requests

503

Service temporarily unavailable

Code Examples
Request
const response = await fetch("https://api.seeapi.com/v1/generations", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Idempotency-Key": "order-20260818-001",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
  "model": "kling-v2-1-master",
  "endpoint": "text-to-video",
  "provider": "seeapi",
  "input": {
    "prompt": "A cinematic city at night",
    "aspect_ratio": "16:9",
    "duration_seconds": 5,
    "cfg_scale": 0.5
  },
  "callback_url": "https://client.example.com/webhooks/seeapi"
})
});

const result = await response.json();
ResponseHTTP 202
{
  "generation": {
    "id": "task_xxx",
    "model": "kling-v2-1-master",
    "endpoint": "text-to-video",
    "provider": "seeapi",
    "status": "processing",
    "estimated_credits": 220,
    "consumed_credits": 0,
    "refunded_credits": 0,
    "created_at": "2026-08-18T10:00:00Z",
    "updated_at": "2026-08-18T10:00:00Z"
  },
  "idempotent": false
}
PreviousKling 2.5 · Image to VideoNextKling 2.1 Master · Image to Video
Request
const response = await fetch("https://api.seeapi.com/v1/generations", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Idempotency-Key": "order-20260818-001",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
  "model": "kling-v2-1-master",
  "endpoint": "text-to-video",
  "provider": "seeapi",
  "input": {
    "prompt": "A cinematic city at night",
    "aspect_ratio": "16:9",
    "duration_seconds": 5,
    "cfg_scale": 0.5
  },
  "callback_url": "https://client.example.com/webhooks/seeapi"
})
});

const result = await response.json();
ResponseHTTP 202
{
  "generation": {
    "id": "task_xxx",
    "model": "kling-v2-1-master",
    "endpoint": "text-to-video",
    "provider": "seeapi",
    "status": "processing",
    "estimated_credits": 220,
    "consumed_credits": 0,
    "refunded_credits": 0,
    "created_at": "2026-08-18T10:00:00Z",
    "updated_at": "2026-08-18T10:00:00Z"
  },
  "idempotent": false
}