MCPilot

Instructions

Implementation Reference

• packages/metamask-mcp/src/tools/get-block-number.ts:13-26 (handler)

  The execute handler function that retrieves the current block number using Wagmi's getBlockNumber action and returns it as a text content block.

  execute: async (args) => {
    const chainId = args.chainId as typeof wagmiConfig['chains'][number]['id']
    const result = await getBlockNumber(wagmiConfig, {
      chainId,
    })
    return {
      content: [
        {
          type: "text",
          text: result.toString(),
        },
      ],
    }
  },

• packages/metamask-mcp/src/tools/get-block-number.ts:10-12 (schema)

  Zod schema defining the optional chainId parameter for the tool.

  parameters: z.object({
    chainId: z.coerce.number().optional(),
  }),

• packages/metamask-mcp/src/tools/get-block-number.ts:7-28 (registration)

  Registers the get-block-number tool on the FastMCP server instance, including name, description, schema, and handler.

    server.addTool({
      name: "get-block-number",
      description: "Get the block nunber of a chain",
      parameters: z.object({
        chainId: z.coerce.number().optional(),
      }),
      execute: async (args) => {
        const chainId = args.chainId as typeof wagmiConfig['chains'][number]['id']
        const result = await getBlockNumber(wagmiConfig, {
          chainId,
        })
        return {
          content: [
            {
              type: "text",
              text: result.toString(),
            },
          ],
        }
      },
    });
  };

• packages/metamask-mcp/src/index.ts:45-45 (registration)

  Invokes the tool registration function on the main MCP server instance.

  registerGetBlockNumberTools(server);