MCPilot

Instructions

Implementation Reference

• packages/metamask-mcp/src/tools/verify-message.ts:16-33 (handler)

  The execute handler that performs the message verification using wagmi's verifyMessage function with the provided address, message, and signature.

  execute: async (args) => {
    const address = args.address as Address
    const message = args.message
    const signature = args.signature as `0x${string}`
    const result = await verifyMessage(wagmiConfig, {
      address,
      message,
      signature,
    })
    return {
      content: [
        {
          type: "text",
          text: result.toString(),
        },
      ],
    }
  },

• packages/metamask-mcp/src/tools/verify-message.ts:11-15 (schema)

  Zod schema for the tool's input parameters: address (string), message (string), signature (string).

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

• packages/metamask-mcp/src/tools/verify-message.ts:8-34 (registration)

  The server.addTool call that registers the "verify-message" tool including its name, description, parameters schema, and execute handler.

  server.addTool({
    name: "verify-message",
    description: "Verify that a message was signed by the provided address",
    parameters: z.object({
      address: z.string(),
      message: z.string(),
      signature: z.string(),
    }),
    execute: async (args) => {
      const address = args.address as Address
      const message = args.message
      const signature = args.signature as `0x${string}`
      const result = await verifyMessage(wagmiConfig, {
        address,
        message,
        signature,
      })
      return {
        content: [
          {
            type: "text",
            text: result.toString(),
          },
        ],
      }
    },
  });

• packages/metamask-mcp/src/tools/verify-message.ts:7-35 (helper)

  Helper function to register the verify-message tool on the FastMCP server.

  export function registerVerifyMessageTools(server: FastMCP): void {
    server.addTool({
      name: "verify-message",
      description: "Verify that a message was signed by the provided address",
      parameters: z.object({
        address: z.string(),
        message: z.string(),
        signature: z.string(),
      }),
      execute: async (args) => {
        const address = args.address as Address
        const message = args.message
        const signature = args.signature as `0x${string}`
        const result = await verifyMessage(wagmiConfig, {
          address,
          message,
          signature,
        })
        return {
          content: [
            {
              type: "text",
              text: result.toString(),
            },
          ],
        }
      },
    });
  };

• packages/metamask-mcp/src/index.ts:58-58 (registration)

  Top-level registration call in the main index.ts file that invokes the helper to add the tool to the MCP server.

  registerVerifyMessageTools(server);