MetaMask MCP

import type { Config } from "@wagmi/core"; import type { FastMCP } from "fastmcp"; import { estimateFeesPerGas } from "@wagmi/core"; import { z } from "zod"; import { JSONStringify } from "../utils/json-stringify"; export function registerEstimateFeePerGasTools(server: FastMCP, wagmiConfig: Config): void { server.addTool({ name: "estimate-fee-per-gas", description: "Estimate for the fees per gas (in wei) for a transaction to be likely included in the next block.", parameters: z.object({ chainId: z.coerce.number().optional().describe("ID of chain to use when fetching data."), formatUnits: z.enum(["ether", "gwei", "wei"]).default("gwei").optional().describe("Units to use when formatting result."), }), execute: async (args) => { const result = await estimateFeesPerGas(wagmiConfig, args); return { content: [ { type: "text", text: JSONStringify(result), }, ], }; }, }); };