MCPilot

Instructions

Implementation Reference

• packages/metamask-mcp/src/tools/get-balance.ts:15-26 (handler)

  The handler function that executes the tool: casts address, calls wagmi's getBalance with wagmiConfig and address, stringifies the result with JSONStringify, and returns it as text content.

  execute: async (args) => {
    const address = args.address as Address
    const result = await getBalance(wagmiConfig, { address })
    return {
      content: [
        {
          type: "text",
          text: JSONStringify(result),
        },
      ],
    }
  },

• packages/metamask-mcp/src/tools/get-balance.ts:12-14 (schema)

  Zod input schema requiring a single 'address' string parameter.

  parameters: z.object({
    address: z.string()
  }),

• packages/metamask-mcp/src/tools/get-balance.ts:9-27 (registration)

  Registers the 'get-native-currency-balance' tool on the FastMCP server within registerGetBalanceTools function.

  server.addTool({
    name: "get-native-currency-balance",
    description: "Get the native currency balance of an address",
    parameters: z.object({
      address: z.string()
    }),
    execute: async (args) => {
      const address = args.address as Address
      const result = await getBalance(wagmiConfig, { address })
      return {
        content: [
          {
            type: "text",
            text: JSONStringify(result),
          },
        ],
      }
    },
  });

• packages/metamask-mcp/src/index.ts:44-44 (registration)

  Top-level call to registerGetBalanceTools during server initialization, which includes the get-native-currency-balance tool.

  registerGetBalanceTools(server);