MCP Kling

Instructions

Implementation Reference

• src/index.ts:504-526 (handler)

  MCP CallToolRequest handler case for 'generate_image_to_video': validates and constructs VideoGenerationRequest from tool arguments, calls klingClient.generateImageToVideo, returns task_id response.

  case 'generate_image_to_video': {
    const videoRequest: VideoGenerationRequest = {
      prompt: args.prompt as string,
      negative_prompt: args.negative_prompt as string | undefined,
      model_name: (args.model_name as 'kling-v1' | 'kling-v1.5' | 'kling-v1.6' | 'kling-v2-master' | undefined) || 'kling-v2-master',
      duration: (args.duration as '5' | '10') || '5',
      mode: (args.mode as 'standard' | 'professional') || 'standard',
      cfg_scale: (args.cfg_scale as number) ?? 0.5,
      image_url: args.image_url as string,
      image_tail_url: args.image_tail_url as string | undefined,
    };
  
    const result = await klingClient.generateImageToVideo(videoRequest);
    
    return {
      content: [
        {
          type: 'text',
          text: `Image-to-video generation started successfully!\nTask ID: ${result.task_id}\n\nUse the check_video_status tool with this task ID to check the progress.`,
        },
      ],
    };
  }

• src/index.ts:163-209 (registration)

  Tool registration object in TOOLS array: defines name, description, and inputSchema for generate_image_to_video, registered via server.setRequestHandler(ListToolsRequestSchema).

  {
    name: 'generate_image_to_video',
    description: 'Generate a video from an image using Kling AI',
    inputSchema: {
      type: 'object',
      properties: {
        image_url: {
          type: 'string',
          description: 'URL of the starting image',
        },
        image_tail_url: {
          type: 'string',
          description: 'URL of the ending image (optional)',
        },
        prompt: {
          type: 'string',
          description: 'Text prompt describing the motion and transformation',
        },
        negative_prompt: {
          type: 'string',
          description: 'Text describing what to avoid in the video (optional)',
        },
        model_name: {
          type: 'string',
          enum: ['kling-v1', 'kling-v1.5', 'kling-v1.6', 'kling-v2-master'],
          description: 'Model version to use (default: kling-v2-master)',
        },
        duration: {
          type: 'string',
          enum: ['5', '10'],
          description: 'Video duration in seconds (default: 5)',
        },
        mode: {
          type: 'string',
          enum: ['standard', 'professional'],
          description: 'Video generation mode (default: standard)',
        },
        cfg_scale: {
          type: 'number',
          description: 'Creative freedom scale 0-1 (default: 0.5)',
          minimum: 0,
          maximum: 1,
        },
      },
      required: ['image_url', 'prompt'],
    },
  },

• src/kling-client.ts:204-233 (helper)

  Core implementation in KlingClient: processes image_url, constructs API request body for Kling AI /v1/videos/image2video endpoint, handles API call and error.

  async generateImageToVideo(request: VideoGenerationRequest): Promise<{ task_id: string }> {
    const path = '/v1/videos/image2video';
    
    if (!request.image_url) {
      throw new Error('image_url is required for image-to-video generation');
    }
    
    // Process the image URL
    const imageUrl = await this.processImageUrl(request.image_url);
  
    const body: any = {
      image: imageUrl, // API uses 'image' not 'image_url'
      prompt: request.prompt,
      negative_prompt: request.negative_prompt || '',
      cfg_scale: request.cfg_scale || 0.8,
      duration: request.duration || '5',
      aspect_ratio: request.aspect_ratio || '16:9',
      model_name: request.model_name || 'kling-v2-master', // V2-master is default
    };
  
    try {
      const response = await this.axiosInstance.post(path, body);
      return response.data.data;
    } catch (error) {
      if (axios.isAxiosError(error)) {
        throw new Error(`Kling API error: ${error.response?.data?.message || error.message}`);
      }
      throw error;
    }
  }