Running a model
Kling AIText to videoKling AI VIDEO 3.0 Pro
High-fidelity multimodal video generation with native audio and advanced editing
One of Auray's catalogue models: the same key, the same credits, the same job lifecycle as every other address.
Its request shape is published below. Whether it runs right now is GET /v1/catalogue's word, with no key needed: its addresses say connected for an address that runs, and a submit to any other is refused before anything is charged — described answers 501 model_not_connected, paused 503 model_disabled.
Category text-to-video · Scope video:write (or external:write on an older key) · Price Credits per megapixel-second (counted as width*height*floor:1.1385*duration): 8.1984. width*height counts as at least 1.1385 megapixels. From 10.368 to 55.296 megapixel-seconds a request. Priced up to height 1920, width 1920; past that a request is refused before any charge. Plus 420 credits when the request sends inputs.referenceVideos (counted as any:inputs.referenceVideos). Plus 4.66625 credits per second of output when providerSettings.klingai.sound=true (counted as any:providerSettings.klingai.sound*duration), up to 15 seconds of output. An MP4 or MOV clip in inputs.referenceVideos uploaded through POST /v1/uploads is held for its own length instead, where its length can be read from the file: 14 credits for each second it runs, rounded up to the next whole second, up to 30 seconds. Any other clip — a WebM, a file whose length cannot be read, or a clip sent by any other link — is held for the full 30 seconds; credits_quoted says which hold was taken. Quoted when you submit, at the most the request can cost; the charge settles to what the job cost and never above the quote. The submit's answer carries the quote as credits_quoted, and credits_charged says what has been taken.
#Input
| Field | Type | Required | Default | Description |
|---|---|---|---|---|
inputs | object | no | — | |
inputs.referenceImages | string[] | no | — | List of reference images (an http(s) URL; upload a local file first and send its read URL). Documented range: 1 to 1. |
inputs.frameImages | string[] | no | — | Images that pin frames of the video, as a list of image URLs: one image is the first frame, two are the first and the last, and three or more anchor the first and the last with the rest spread evenly between. Each item is a plain URL; the object form that names a frame or a timestamp is not accepted here. Documented range: 1 to 2. |
inputs.referenceVideos | string[] | no | — | List of reference videos (an http(s) URL; upload a local file first and send its read URL). Documented range: 1 to 1. |
positivePrompt | string | no | — | Text prompt describing elements to include in the generated output. Documented range: 2 to 2,500 characters. |
negativePrompt | string | no | — | Prompt to guide what to exclude from generation. Ignored when guidance is disabled (CFGScale ≤ 1). Documented range: 2 to 2,500 characters. |
width | integer | no | 1920 | Width of the generated media in pixels. |
height | integer | no | 1080 | Height of the generated media in pixels. |
duration | integer | no | 5 | Length of the generated video in seconds. The total number of frames produced is determined by duration multiplied by the model's frame rate (fps). Documented range: 3 to 15. |
providerSettings | object | no | — | |
providerSettings.klingai | object | no | — | |
providerSettings.klingai.characterOrientation | string | no | — | Source for character orientation reference. One of "image", "video". |
providerSettings.klingai.keepOriginalSound | boolean | no | — | Maintain the original sound from the reference video. |
providerSettings.klingai.multiPrompt | object[] | no | — | |
providerSettings.klingai.multiPrompt[].prompt | string | no | — | Text prompt describing the content for this segment. Documented range: 3 to 512 characters. |
providerSettings.klingai.multiPrompt[].duration | integer | no | — | Duration in seconds for this segment. Documented range: 1 or more. |
providerSettings.klingai.shotType | string | no | — | Type of shot to generate. |
providerSettings.klingai.sound | boolean | no | — | Enable native audio generation. |
outputType | string | no | "URL" | Video output type. One of "URL". |
outputFormat | string | no | "MP4" | Specifies the file format of the generated output. The available values depend on the task type and the specific model's capabilities. - `JPG`: Best for photorealistic images with smaller file sizes (no transparency). - `PNG`: Lossless compression, supports high quality and transparency (alpha channel). - `WEBP`: Modern format providing superior compression and transparency support. - `MP4`: Widely supported video container (H.264), recommended for general use. - `WEBM`: Optimized for web delivery. - `MOV`: QuickTime format, common in professional workflows (Apple ecosystem). - `GIF`: Animated image format (no audio), suitable for short loops or previews. - `MP3`: Compressed audio, smaller file size. - `WAV`: Uncompressed, high-quality audio. - `FLAC`: Lossless compression. - `OGG`: Open-source compressed audio format (Vorbis codec). - `SVG`: Scalable Vector Graphics. - `TIFF`: High-quality output supporting layers. - `GLB`: Binary glTF format for 3D models, including geometry, textures, and PBR materials. > [!NOTE] > **Transparency**: If you are using features like background removal or LayerDiffuse that require transparency, you must select a format that supports an alpha channel (e.g., `PNG`, `WEBP`, `TIFF`). `JPG` does not support transparency. One of "MP4", "WEBM", "MOV". |
outputQuality | integer | no | 95 | Compression quality of the output. Higher values preserve quality but increase file size. Documented range: 20 to 99. |
safety | object | no | — | |
safety.checkContent | boolean | no | — | Enable or disable content safety checking. Increases total generation time. Always on: a false is sent as true. |
safety.mode | string | no | "fast" | Safety checking mode for video generation. Only fast or full is sent here: any other value is sent as fast. One of "fast", "full". |
idempotency_key | string | no | — | Your own name for this request. Send the same one twice and the second call is answered with the first request rather than charged again. Idempotency-Key: as a header is accepted as an alias — that is the spelling a retrying proxy replays, and the one to use when running a model on auray.run, where a request that outlives its connection is answered 504 and recovered by replay. Omit it and the platform mints one. 1 to 64 characters. |
#Rules
Across fields, as the model's documentation states them. Each is judged before anything is charged — warned with a Deprecation header until enforcement starts — and listed as JSON Schema under x-auray-rules in the openapi.json.
- Send
heightwheneverwidthis sent. Sendwidthwheneverheightis sent. - When
inputs.frameImagesis sent orinputs.referenceVideosis sent, do not send a request wherewidthis sent, or whereheightis sent. Otherwise,widthandheightare required. - Do not send
positivePrompttogether withproviderSettings.klingai.multiPrompt. - Do not send
providerSettings.klingai.shotTypetogether withproviderSettings.klingai.multiPrompt. - Do not send a request where
inputs.frameImagesis sent andinputs.referenceImagesis sent orinputs.referenceVideosis sent. - When
inputs.referenceVideosis sent, do not send a request whereproviderSettings.klingai.soundis sent, or whereproviderSettings.klingai.multiPromptis sent, or whereproviderSettings.klingai.shotTypeis sent, or wheredurationis sent. - When
widthis sent orheightis sent,widthandheightmust be one of these: 1080p (16:9): width 1920, height 1080; 1080p (1:1): width 1440, height 1440; 1080p (9:16): width 1080, height 1920. - When
inputs.referenceImagesis sent,inputs.referenceVideosis sent orproviderSettings.klingai.characterOrientationis sent,inputs.referenceImages,inputs.referenceVideosandproviderSettings.klingai.characterOrientationare required. - When
providerSettings.klingai.keepOriginalSoundis sent,inputs.referenceVideosis required. - When
inputs.referenceVideosis not sent, send exactly one ofpositivePromptorproviderSettings.klingai.multiPrompt. providerSettings.klingai.multiPromptmust hold at most 6 items. In every item ofproviderSettings.klingai.multiPrompt:providerSettings.klingai.multiPrompt[].promptandproviderSettings.klingai.multiPrompt[].durationare required.
#Example
curl -X POST https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro \
-H "Authorization: Bearer $AURAY_API_KEY" \
-H "content-type: application/json" \
-d '{
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
}'import { createClient } from "@auray/client";
const auray = createClient(); // reads AURAY_API_KEY
const result = await auray.subscribe("auray-serverless/klingai/kling-video-3-pro", {
input: {
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
},
onQueueUpdate: (update) => console.log(update.status),
});
console.dir(result, { depth: null });from auray_client import Client
auray = Client() # reads AURAY_API_KEY
result = auray.subscribe(
"auray-serverless/klingai/kling-video-3-pro",
input={
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
},
on_queue_update=lambda update: print(update["status"]),
)
print(result){
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "run_model",
"arguments": {
"address": "auray-serverless/klingai/kling-video-3-pro",
"input": {
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
}
}
}
}const res = await fetch("https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AURAY_API_KEY}`,
"content-type": "application/json",
},
body: JSON.stringify({
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
}),
});
console.log(await res.json());import os, requests
r = requests.post(
"https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro",
headers={"Authorization": f"Bearer {os.environ['AURAY_API_KEY']}"},
json={
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
},
)
r.raise_for_status()
print(r.json())package main
import (
"bytes"
"fmt"
"io"
"net/http"
"os"
)
func main() {
body := []byte(`{
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
}`)
req, err := http.NewRequest("POST", "https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro", bytes.NewReader(body))
if err != nil {
panic(err)
}
req.Header.Set("Authorization", "Bearer "+os.Getenv("AURAY_API_KEY"))
req.Header.Set("Content-Type", "application/json")
res, err := http.DefaultClient.Do(req)
if err != nil {
panic(err)
}
defer res.Body.Close()
out, _ := io.ReadAll(res.Body)
fmt.Println(res.Status, string(out))
}<?php
$ch = curl_init("https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro");
curl_setopt_array($ch, [
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HTTPHEADER => [
"Authorization: Bearer " . getenv("AURAY_API_KEY"),
"Content-Type: application/json",
],
CURLOPT_POSTFIELDS => json_encode([
"width" => 1920,
"height" => 1080,
"positivePrompt" => "a brass orrery on a walnut desk, morning light from a window to the left",
], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE),
]);
$response = curl_exec($ch);
echo curl_getinfo($ch, CURLINFO_HTTP_CODE), " ", $response, PHP_EOL;require "net/http"
require "json"
uri = URI("https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro")
req = Net::HTTP::Post.new(uri)
req["Authorization"] = "Bearer #{ENV.fetch("AURAY_API_KEY")}"
req["Content-Type"] = "application/json"
req.body = {
"width" => 1920,
"height" => 1080,
"positivePrompt" => "a brass orrery on a walnut desk, morning light from a window to the left"
}.to_json
res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(req) }
puts res.code, res.bodyimport java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
public class Main {
public static void main(String[] args) throws Exception {
String body = """
{
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
}""";
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro"))
.header("Authorization", "Bearer " + System.getenv("AURAY_API_KEY"))
.header("Content-Type", "application/json")
.method("POST", HttpRequest.BodyPublishers.ofString(body))
.build();
HttpResponse<String> response = HttpClient.newHttpClient()
.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.statusCode() + " " + response.body());
}
}using System.Net.Http.Headers;
using System.Text;
using var client = new HttpClient();
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("Bearer", Environment.GetEnvironmentVariable("AURAY_API_KEY"));
using var request = new HttpRequestMessage(HttpMethod.Post, "https://queue.auray.run/auray-serverless/klingai/kling-video-3-pro");
var body = """
{
"width": 1920,
"height": 1080,
"positivePrompt": "a brass orrery on a walnut desk, morning light from a window to the left"
}
""";
request.Content = new StringContent(body, Encoding.UTF8, "application/json");
using var response = await client.SendAsync(request);
Console.WriteLine($"{(int)response.StatusCode} {await response.Content.ReadAsStringAsync()}");The same body on https://auray.run runs synchronously and answers the result — unless it usually takes longer than a run may hold its connection, which is refused 400 model_not_synchronous before anything is charged. Options — ?webhook=, ?wait=, priority and timeout headers — are on Submit a request.
#Machine contracts
- openapi.json — this page as an OpenAPI 3.1 document, public.
- llms.txt — the same, written for an agent.