curl --request POST \
--url https://api.vidgo.ai/api/generate/submit \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "kwaivgi/kling-video-o3-pro/text-to-video",
"input": {
"duration": 5,
"sound": true,
"multi_shots": true,
"multi_prompt": [
{
"prompt": "Cinematic whimsical realism in a warm oak library. Medium two-shot: a small ivory robot with an oval face and amber eyes shelves a blue book, accidentally knocking one red book onto the floor. Beside it, an adult librarian wears a green cardigan and round glasses. Both remain visible under warm reading lamps. One distinct book thud against quiet room tone. Unmarked book covers. No text, logos or watermarks.",
"duration": 2
},
{
"prompt": "Cut closer to the same ivory robot and green-cardigan librarian in the same oak library. The librarian raises one finger to her lips. The robot tilts its head apologetically and softly says exactly \"Sorry.\" in a gentle robotic voice, synchronized with its small mouth light. Preserve their appearance, positions and warm lighting. End in an embarrassed pause; no music. No text, logos or watermarks.",
"duration": 3
}
],
"aspect_ratio": "16:9"
}
}
'{
"code": 200,
"data": {
"task_id": "task-submitted-example",
"status": "not_started",
"created_time": "2026-09-22T00:00:00Z"
}
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}Request timeout{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}Kling
Kling O3 Pro Text To Video
Generate 3–15-second videos from text prompts with Kling O3 Pro. Supports single-shot and multi-shot generation. Explicitly set sound; multi-shot requires audio.
POST
/
api
/
generate
/
submit
curl --request POST \
--url https://api.vidgo.ai/api/generate/submit \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "kwaivgi/kling-video-o3-pro/text-to-video",
"input": {
"duration": 5,
"sound": true,
"multi_shots": true,
"multi_prompt": [
{
"prompt": "Cinematic whimsical realism in a warm oak library. Medium two-shot: a small ivory robot with an oval face and amber eyes shelves a blue book, accidentally knocking one red book onto the floor. Beside it, an adult librarian wears a green cardigan and round glasses. Both remain visible under warm reading lamps. One distinct book thud against quiet room tone. Unmarked book covers. No text, logos or watermarks.",
"duration": 2
},
{
"prompt": "Cut closer to the same ivory robot and green-cardigan librarian in the same oak library. The librarian raises one finger to her lips. The robot tilts its head apologetically and softly says exactly \"Sorry.\" in a gentle robotic voice, synchronized with its small mouth light. Preserve their appearance, positions and warm lighting. End in an embarrassed pause; no music. No text, logos or watermarks.",
"duration": 3
}
],
"aspect_ratio": "16:9"
}
}
'{
"code": 200,
"data": {
"task_id": "task-submitted-example",
"status": "not_started",
"created_time": "2026-09-22T00:00:00Z"
}
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}Request timeout{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}{
"detail": "<string>"
}Submit with your Vidgo API key, then query task status using the returned task ID. An optional callback receives the final result. The submit response above is an initial-state illustration, not the completed video response.
Parameters
Use modelkwaivgi/kling-video-o3-pro/text-to-video. Put generation parameters inside input.
prompt: Required when multi_shots=false. Describe the scene, action and camera movement. Use nonblank text, up to 2,500 characters after trimming. Omit prompt when multi_shots=true.multi_prompt: Required when multi_shots=true; omit in single-shot mode. Supply at least one shot, each with a nonblank prompt of up to 2,500 characters and an integer duration of 1–12 seconds. Shot durations must sum to the top-level duration (3–15 seconds). Extra fields inside a shot are ignored.duration: Required integer from 3 to 15 seconds. In multi-shot mode, this must equal the sum of all shot durations. Credits are calculated using this value.multi_shots: Required: explicitly send false for a single shot or true for multiple shots. Single-shot mode requires prompt. Multi-shot mode requires multi_prompt and sound=true, with no nonblank top-level prompt. Omitting this field is an error.sound: Required: explicitly send true to generate audio or false for video without audio. Single-shot mode accepts either value; multi-shot mode requires true.aspect_ratio: Optional: 16:9 (landscape), 9:16 (portrait) or 1:1 (square). Sets the video aspect ratio.
Billing Factors
Billing depends on the model tier, video duration (duration), and whether audio is generated (sound). Usage is charged per generated second.
Failed generation tasks are refunded.
Default example: A Quiet Apology
This is the same default example shown on the model page.{
"model": "kwaivgi/kling-video-o3-pro/text-to-video",
"input": {
"duration": 5,
"sound": true,
"multi_shots": true,
"multi_prompt": [
{
"prompt": "Cinematic whimsical realism in a warm oak library. Medium two-shot: a small ivory robot with an oval face and amber eyes shelves a blue book, accidentally knocking one red book onto the floor. Beside it, an adult librarian wears a green cardigan and round glasses. Both remain visible under warm reading lamps. One distinct book thud against quiet room tone. Unmarked book covers. No text, logos or watermarks.",
"duration": 2
},
{
"prompt": "Cut closer to the same ivory robot and green-cardigan librarian in the same oak library. The librarian raises one finger to her lips. The robot tilts its head apologetically and softly says exactly \"Sorry.\" in a gentle robotic voice, synchronized with its small mouth light. Preserve their appearance, positions and warm lighting. End in an embarrassed pause; no music. No text, logos or watermarks.",
"duration": 3
}
],
"aspect_ratio": "16:9"
}
}
Completed result from the status endpoint
GET /api/generate/status/{task_id}
The response below records this verified example. For a new generation, query the task ID returned by your own submission.
{
"code": 200,
"data": {
"task_id": "BRDSCRKN4Q0WH4T6",
"status": "finished",
"files": [
{
"file_type": "video",
"file_url": "https://cdn.vidgo.ai/apis/models/kwaivgi/kling-video-o3-pro/text-to-video/v1/01/output.mp4"
}
],
"created_time": "2026-09-22T18:43:52",
"error_message": null,
"progress": 100
}
}
The API validates prompts up to 2,500 characters. Some multi-shot generation requests have failed when a shot prompt exceeded 512 characters. We recommend keeping each shot prompt within 512 characters; this recommendation does not change the API validation limit.
Authorizations
Use VIDGO_API_KEY.
Body
application/json
Keep model and callback_url at the root. Unknown root fields are ignored; unsupported input fields are rejected.
Example:
"kwaivgi/kling-video-o3-pro/text-to-video"
Video generation parameters. Use standard JSON numbers and booleans. For compatibility, integer strings such as "5" are accepted. Boolean strings true/1/yes/y/on mean true; false/0/no/n/off mean false. These strings are case-insensitive and trimmed. Numeric 1 and 0 are also accepted for boolean fields. Numeric and boolean prompt values are converted to text; 0, false and null are treated as empty. Objects and arrays are not accepted as prompts.
Show child attributes
Show child attributes
Optional public HTTP(S) endpoint for task completion notifications. HTTPS is recommended. Omit, use null, or use an empty string to disable callbacks.