Kling 2.1 API
Kling 2.1 (image-to-video) with standard / pro modes.
Integrate Kling 2.1 with a single API call — one key, one unified endpoint, and shared billing across every model on Apiframe.
model: "kling-2.1" What's special about Kling 2.1
- Generates clips from 5s to 10s.
- Image-to-video and reference-image support.
- Fast turnaround — about 120s per generation on average.
- Pay-as-you-go pricing with no Kuaishou account required — you only pay for successful generations.
- One API key, unified billing, idempotency and webhooks across every Apiframe model.
Made with Kling 2.1
A few outputs generated through the Kling 2.1 API on Apiframe.
Drone shot flying over a tropical coastline at sunrise, smooth cinematic motion
A vintage car driving through a rainy neon city at night, reflections on the asphalt
Time-lapse of clouds rolling over a mountain range in warm golden light
Overview
- Endpoint
- POST /v2/videos/generate
- Model ID
- kling-2.1
- Params key
- klingParams
- Modality
- video
- Provider
- Kuaishou
- Pricing
- Pay-as-you-go
- Avg. completion
- ~120s
Capabilities
Quick start
Send a single POST /v2/videos/generate request with your API key to
generate with Kling 2.1. The call returns a jobId you can poll or
receive via webhook.
curl -X POST https://api.apiframe.ai/v2/videos/generate \
-H "X-API-Key: afk_your_api_key_here" \
-H "Content-Type: application/json" \
-d '{
"prompt": "a cinematic sunrise over a futuristic cityscape, smooth camera push-in",
"model": "kling-2.1",
"klingParams": {
"start_image": "https://example.com/input.jpg",
"mode": "pro",
"end_image": "https://example.com/input.jpg",
"negative_prompt": "What to avoid (e.g. blurry, distorted, watermark)"
}
}'import requests
response = requests.post(
"https://api.apiframe.ai/v2/videos/generate",
headers={
"X-API-Key": "afk_your_api_key_here",
"Content-Type": "application/json",
},
json={
"prompt": "a cinematic sunrise over a futuristic cityscape, smooth camera push-in",
"model": "kling-2.1",
"klingParams": {
"start_image": "https://example.com/input.jpg",
"mode": "pro",
"end_image": "https://example.com/input.jpg",
"negative_prompt": "What to avoid (e.g. blurry, distorted, watermark)"
}
},
)
print(response.json()) # { "jobId": "...", "status": "QUEUED" }const response = await fetch("https://api.apiframe.ai/v2/videos/generate", {
method: "POST",
headers: {
"X-API-Key": "afk_your_api_key_here",
"Content-Type": "application/json",
},
body: JSON.stringify({
"prompt": "a cinematic sunrise over a futuristic cityscape, smooth camera push-in",
"model": "kling-2.1",
"klingParams": {
"start_image": "https://example.com/input.jpg",
"mode": "pro",
"end_image": "https://example.com/input.jpg",
"negative_prompt": "What to avoid (e.g. blurry, distorted, watermark)"
}
}),
});
const { jobId } = await response.json();
console.log(jobId);Response & job lifecycle
Generation is asynchronous. A successful submission returns 202 Accepted
with a jobId. Poll GET /v2/jobs/{id} (or supply a
webhook_url) until the status is COMPLETED; the
result field then holds the output URL(s).
1. Submission response (202)
{
"jobId": "b2c3d4e5-f6a7-8901-bcde-f23456789012",
"status": "QUEUED"
}2. Poll for the result
curl https://api.apiframe.ai/v2/jobs/JOB_ID \
-H "X-API-Key: afk_your_api_key_here"import requests, time
while True:
job = requests.get(
"https://api.apiframe.ai/v2/jobs/JOB_ID",
headers={"X-API-Key": "afk_your_api_key_here"},
).json()
if job["status"] in ("COMPLETED", "FAILED"):
break
time.sleep(2)
print(job["result"])let job;
do {
await new Promise((r) => setTimeout(r, 2000));
job = await fetch("https://api.apiframe.ai/v2/jobs/JOB_ID", {
headers: { "X-API-Key": "afk_your_api_key_here" },
}).then((r) => r.json());
} while (job.status !== "COMPLETED" && job.status !== "FAILED");
console.log(job.result);Input schema
Request parameters accepted by the Kling 2.1 endpoint. Model-specific options are nested under the params object shown below.
| Parameter | Type | Required | Default | Allowed / range | Description |
|---|---|---|---|---|---|
| prompt | string | required | — | — | Text description of what to generate. |
| model | string | required | "kling-2.1" | "kling-2.1" | The model identifier for this endpoint. |
| klingParams.start_image | string (URL) | optional | — | — | Use a still as the first frame of the clip. |
| klingParams.mode | string | optional | "pro" | "standard", "pro" | Mode |
| klingParams.end_image | string (URL) | optional | — | — | Optional last frame to control the ending. |
| klingParams.negative_prompt | string | optional | — | — | Negative prompt |
Frequently Asked Questions
Common questions about the Kling 2.1 API.
Is there an API for Kling 2.1?
Yes. Apiframe exposes Kling 2.1 through a single REST endpoint (`POST /v2/videos/generate` with `model: "kling-2.1"`). You get one unified API, key, and billing across every supported model — no separate Kuaishou account required.
How much does the Kling 2.1 API cost?
Kling 2.1 uses simple pay-as-you-go pricing on Apiframe — you only pay for successful generations. See the pricing page for plans and volume discounts.
How do I call the Kling 2.1 API?
Send a POST request to `/v2/videos/generate` with your `X-API-Key` and a JSON body containing `model: "kling-2.1"`. The call returns a `jobId`; poll `GET /v2/jobs/{id}` or use a webhook to receive the result.
What parameters does Kling 2.1 support?
Kling 2.1 accepts 4 model-specific parameters (nested under `klingParams`) plus the common `prompt` and `webhook_url` fields. See the input schema above for the full list with types and defaults.
Still have questions?
Start building with the Kling 2.1 API
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