MetaMask MCP

Instructions

Implementation Reference

• src/tools/get-chains.ts:12-22 (handler)

  The handler (execute function) for the 'get-chains' tool. It calls getChains from @wagmi/core using the provided wagmiConfig and returns the result as a text content block with JSONStringify serialization.

  execute: async () => {
    const result = getChains(wagmiConfig);
    return {
      content: [
        {
          type: "text",
          text: JSONStringify(result),
        },
      ],
    };
  },

• src/tools/get-chains.ts:11-11 (schema)

  Zod schema defining the tool parameters as an empty object (no input parameters required).

  parameters: z.object({}),

• src/tools/get-chains.ts:8-23 (registration)

  Registration of the 'get-chains' tool on the FastMCP server within the registerGetChainsTools function, including name, description, schema, and inline handler.

  server.addTool({
    name: "get-chains",
    description: "Get the configured chains.",
    parameters: z.object({}),
    execute: async () => {
      const result = getChains(wagmiConfig);
      return {
        content: [
          {
            type: "text",
            text: JSONStringify(result),
          },
        ],
      };
    },
  });

• src/tools/register-tools.ts:45-45 (registration)

  Call to register the 'get-chains' tool as part of the overall registerTools function that registers all tools.

  registerGetChainsTools(server, wagmiConfig);