MCPollinations Multimodal MCP Server

Instructions

Implementation Reference

• src/services/audioService.js:95-119 (handler)

  The core handler function implementing listAudioVoices tool logic, returning a hardcoded list of available TTS voices.

  /**
   * List available audio voices
   *
   * @returns {Promise<Object>} - Object containing the list of available voice options
   */
  export async function listAudioVoices() {
    // Return the complete list of available voices
    const voices = [
      "alloy",
      "echo",
      "fable",
      "onyx",
      "nova",
      "shimmer",
      "coral",
      "verse",
      "ballad",
      "ash",
      "sage",
      "amuch",
      "dan"
    ];
  
    return { voices };
  }

• src/services/audioSchema.js:33-43 (schema)

  JSON schema defining the listAudioVoices tool, including name, description, and empty input schema (no parameters required).

  /**
   * Schema for the listAudioVoices tool
   */
  export const listAudioVoicesSchema = {
    name: 'listAudioVoices',
    description: 'List all available audio voices for text-to-speech generation',
    inputSchema: {
      type: 'object',
      properties: {}
    }
  };

• pollinations-mcp-server.js:329-344 (registration)

  MCP server dispatch handler that executes listAudioVoices tool upon matching tool name and formats the response.

  } else if (name === 'listAudioVoices') {
    try {
      const result = await listAudioVoices();
      return {
        content: [
          { type: 'text', text: JSON.stringify(result, null, 2) }
        ]
      };
    } catch (error) {
      return {
        content: [
          { type: 'text', text: `Error listing audio voices: ${error.message}` }
        ],
        isError: true
      };
    }

• src/schemas.js:28-44 (registration)

  Central function registering all tool schemas (including listAudioVoicesSchema) for the MCP ListTools endpoint.

  /**
   * Get all tool schemas as an array
   * @returns {Array} Array of all tool schemas
   */
  export function getAllToolSchemas() {
    return [
      generateImageUrlSchema,
      generateImageSchema,
      editImageSchema,
      generateImageFromReferenceSchema,
      listImageModelsSchema,
      respondAudioSchema,
      listAudioVoicesSchema,
      respondTextSchema,
      listTextModelsSchema
    ];
  }