MetaMask MCP

import type { Config } from "@wagmi/core"; import type { FastMCP } from "fastmcp"; import { waitForTransactionReceipt } from "@wagmi/core"; import { z } from "zod"; import { TransactionHash } from "../utils/evm-schema"; import { JSONStringify } from "../utils/json-stringify"; export function registerWaitForTransactionReceiptTools(server: FastMCP, wagmiConfig: Config): void { server.addTool({ name: "wait-for-transaction-receipt", description: "Waits for the transaction to be included on a block, and then returns the transaction receipt.", parameters: z.object({ hash: TransactionHash.describe("The transaction hash to wait for."), confirmations: z.coerce.number().optional().default(0).describe("The number of confirmations (blocks that have passed) to wait before resolving."), chainId: z.coerce.number().optional().describe("ID of chain to use when fetching data."), }), execute: async (args) => { try { const result = await waitForTransactionReceipt(wagmiConfig, args); return { content: [ { type: "text", text: JSONStringify(result), }, ], }; } catch (error) { return { content: [ { type: "text", text: (error as Error).message, }, ], }; } }, }); };