> ## Documentation Index > Fetch the complete documentation index at: https://docs.vidgo.ai/llms.txt > Use this file to discover all available pages before exploring further. # Kling Avatar 2.0 Standard > Create a speaking avatar with Kling Avatar 2.0 Standard, combining a character image and an audio performance with optional text direction. 1. Submit the request with `VIDGO_API_KEY`. A `task_id` is returned immediately. Keep it until the task reaches `finished` or `failed`. 2. Use [Query Task Status](/api-manual/task-management/status) to retrieve the result. If you provide a `callback_url`, Vidgo sends the result to your [webhook](/api-manual/task-management/webhooks) when the task finishes or fails. # Kling Avatar 2.0 Standard Create a speaking avatar with Kling Avatar 2.0 Standard, combining a character image and an audio performance with optional text direction. ## Available Models * **kwaivgi/kling-video/ai-avatar/v2/standard** - Animate a character image with driving audio. ## Duration Options * **Driving audio: 2-60 seconds** - The service detects the duration of `audio_url`. * Do not send `duration`. The audio must be publicly reachable over HTTP(S) and no larger than **5 MiB**. ## Key Features * Animate a character image with driving audio. * Accepts exactly 1 image in `image_urls`. ## Advanced Parameters Set `model` and optional `callback_url` at the request root. Place all workflow parameters, including output options, inside `input`. Send only the input fields supported by this workflow. Unsupported `input` fields are rejected before credits are deducted. Input URLs must use HTTP(S), include a hostname, and contain no embedded credentials. Image inputs also accept image Data URIs or raw Base64. Image conversion and media validation complete before credits are deducted. ### Image URLs * `image_urls`: Required. Supply exactly 1 item. Each item may be a public HTTP(S) URL, image Data URI, or raw Base64. Image order is preserved. ### Audio URL * `audio_url`: Required. Provide the input audio URL. Use a publicly accessible HTTP(S) URL. ### Prompt * `prompt`: Optional. Describe the scene and desired motion. Maximum **2500 characters** after trimming. * Leading and trailing whitespace is trimmed. Omitted, null, empty, and whitespace-only values are treated as omitted. ## Pricing Usage is based on the detected driving-audio duration, rounded up to a whole second. Check the Vidgo dashboard for the current rate. Credits are deducted on submission and refunded if the task fails. ## OpenAPI ````yaml api-manual/video-series/kwaivgi-kling-video-ai-avatar-v2-standard.json POST /api/generate/submit openapi: 3.0.0 info: title: Vidgo API - Kling Avatar 2.0 Standard description: >- Create a speaking avatar with Kling Avatar 2.0 Standard, combining a character image and an audio performance with optional text direction. version: 1.0.0 servers: - url: https://api.vidgo.ai security: - BearerAuth: [] paths: /api/generate/submit: post: tags: - Video Series summary: Kling Avatar 2.0 Standard description: >- Send only the fields shown for this workflow. Parameters from other workflows are rejected before credits are deducted. Optional prompt strings are trimmed; null, empty, and whitespace-only prompts are omitted. Provide exactly one image as a public HTTP(S) URL, image Data URI, or raw Base64. Audio requires a public HTTP(S) URL with no embedded credentials. Base64 conversion and media validation happen before credits are deducted. Driving audio must be between two and sixty seconds. Usage is based on its detected duration, rounded up to a whole second. Driving audio must be a publicly reachable HTTP(S) file of at most 5 MiB (5,242,880 bytes). operationId: submit_kwaivgi_kling_video_ai_avatar_v2_standard requestBody: required: true content: application/json: schema: type: object required: - model - input additionalProperties: true description: >- Keep model and callback_url at the root. Unknown root fields are ignored; unsupported input fields are rejected. properties: model: type: string enum: - kwaivgi/kling-video/ai-avatar/v2/standard example: kwaivgi/kling-video/ai-avatar/v2/standard description: >- Vidgo public model ID. Must be `kwaivgi/kling-video/ai-avatar/v2/standard`. input: type: object required: - audio_url - image_urls properties: image_urls: type: array items: type: string minLength: 1 description: Image urls. minItems: 1 maxItems: 1 description: >- Exactly one image: public HTTP(S) URL, image Data URI, or raw Base64. Base64 is converted to a URL before submission. audio_url: type: string format: uri description: >- Public HTTP(S) driving audio URL. Duration must be 2–60 seconds, inclusive; file size must not exceed 5 MiB. prompt: type: string nullable: true maxLength: 2500 description: >- Optional prompt, maximum 2500 characters. Leading and trailing whitespace is trimmed; null, empty, or whitespace-only values are omitted. additionalProperties: false callback_url: type: string nullable: true description: >- Optional public HTTP(S) endpoint for task completion notifications. HTTPS is recommended. Omit, use null, or use an empty string to disable callbacks. examples: basic: summary: Basic workflow value: model: kwaivgi/kling-video/ai-avatar/v2/standard input: audio_url: https://example.com/audio.mp3 image_urls: - https://example.com/image.png callback: summary: Receive a completion callback value: model: kwaivgi/kling-video/ai-avatar/v2/standard input: audio_url: https://example.com/audio.mp3 image_urls: - https://example.com/image.png callback_url: https://your-domain.com/callback responses: '200': description: Task submitted content: application/json: schema: type: object required: - code - data properties: code: type: integer enum: - 200 data: type: object required: - task_id - status - created_time properties: task_id: type: string status: type: string enum: - not_started - running - finished - failed created_time: type: string format: date-time example: code: 200 data: task_id: task-unified-example status: running created_time: '2026-09-10T08:00:00' '400': description: >- Invalid input, unsupported tier, inaccessible media, or insufficient credits content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '401': description: Invalid credentials content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '403': description: Access denied content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '404': description: Unknown or disabled model content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '408': description: Request timed out content: text/plain: schema: type: string example: Request timeout '422': description: Invalid JSON or non-object request body content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '429': description: Rate or API key credit limit exceeded content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '500': description: Internal error content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '502': description: Unable to create the upstream generation task content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} '503': description: Model configuration or capability is not approved content: application/json: schema: type: object required: - detail properties: detail: oneOf: - type: string - type: object additionalProperties: true - type: array items: {} components: securitySchemes: BearerAuth: type: http scheme: bearer description: Use VIDGO_API_KEY. ````