Foundry MCP Server

import { z } from "zod"; import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js"; import { checkFoundryInstalled, executeCommand, FOUNDRY_PATHS, FOUNDRY_NOT_INSTALLED_ERROR } from "../../utils/command.js"; import { resolveRpcUrl } from "../../utils/rpc.js"; export function registerCastChainTool(server: McpServer): void { server.tool( "cast_chain", "Get information about the current chain", { rpcUrl: z.string().optional().describe("JSON-RPC URL (default: http://localhost:8545)"), returnId: z.boolean().optional().describe("Return the chain ID instead of the name (default: false)") }, async ({ rpcUrl, returnId = false }) => { const installed = await checkFoundryInstalled(); if (!installed) { return { content: [{ type: "text", text: FOUNDRY_NOT_INSTALLED_ERROR }], isError: true }; } const resolvedRpcUrl = await resolveRpcUrl(rpcUrl); const command = returnId ? `${FOUNDRY_PATHS.castPath} chain-id --rpc-url "${resolvedRpcUrl}"` : `${FOUNDRY_PATHS.castPath} chain --rpc-url "${resolvedRpcUrl}"`; const result = await executeCommand(command); return { content: [{ type: "text", text: result.success ? `Chain ${returnId ? "ID" : "name"}: ${result.message.trim()}` : `Failed to get chain information: ${result.message}` }], isError: !result.success }; } ); }