VOICEVOX MCP Server

Implementation Reference

• src/index.ts:41-46 (handler)

  Handler function for the 'speakers' tool: fetches speaker data using fetchSpeakers and returns it as a text content block with JSON stringified data.

  async () => {
    const data = await fetchSpeakers();
    return {
      content: [{ type: "text", text: JSON.stringify(data) }],
    }
  }

• src/index.ts:39-47 (registration)

  Registration of the 'speakers' tool on the MCP server, with empty input schema ({}), using the handler function that returns speaker list as JSON text.

  server.tool("speakers",
    {},
    async () => {
      const data = await fetchSpeakers();
      return {
        content: [{ type: "text", text: JSON.stringify(data) }],
      }
    }
  )

• src/api.ts:4-7 (helper)

  Helper function fetchSpeakers() that retrieves the list of speakers from the VOICEVOX API endpoint.

  export async function fetchSpeakers() {
    const res = await fetch(`${VOICEVOX_API_URL}/speakers`);
    return await res.json();
  }