Arbitrum MCP Server

Instructions

Implementation Reference

• src/index.ts:138-150 (handler)

  The handler logic for the 'clear_rpc_url' tool. It stores the old URL, sets defaultRpcUrl to null, and returns a text confirmation message indicating whether an URL was cleared or none was set.

  case "clear_rpc_url":
    const oldUrl = this.defaultRpcUrl;
    this.defaultRpcUrl = null;
    return {
      content: [
        {
          type: "text",
          text: oldUrl
            ? `Cleared default RPC URL: ${oldUrl}`
            : "No default RPC URL was configured",
        },
      ],
    };

• src/index.ts:846-853 (schema)

  The schema definition and registration for the 'clear_rpc_url' tool in the list of available tools. It specifies the name, description, and empty input schema (no parameters required).

  {
    name: "clear_rpc_url",
    description: "Clear the default RPC URL",
    inputSchema: {
      type: "object" as const,
      properties: {},
    },
  },

• src/index.ts:93-102 (registration)

  The ListToolsRequestSchema handler that returns the list of tools including 'clear_rpc_url' via getAvailableTools().

  this.server.setRequestHandler(ListToolsRequestSchema, async () => {
    try {
      console.error("Handling list tools request");
      return {
        tools: this.getAvailableTools(),
      };
    } catch (error) {
      console.error("Error in list tools handler:", error);
      throw error;
    }

• src/index.ts:18-18 (helper)

  The class property defaultRpcUrl that stores the default RPC URL, which is cleared by the clear_rpc_url tool.

  private defaultRpcUrl: string | null = null;