Whois MCP

Instructions

Implementation Reference

• src/index.ts:15-28 (handler)

  Handler function that performs the whoisDomain lookup using the imported whoisDomain function, formats the result as text content, and handles errors.

  async ({ domain }) => {
    try {
      const result = await whoisDomain(domain);
      return {
        content: [{ type: 'text', text: `Domain whois lookup for: \n${JSON.stringify(result)}` }],
      };
    } catch (err: unknown) {
      const error = err as Error;
      return {
        content: [{ type: 'text', text: `Error: ${error.message}` }],
        isError: true
      };
    }
  }

• src/index.ts:14-14 (schema)

  Zod schema defining the input parameter 'domain' as a non-empty string.

  { domain: z.string().min(1) },

• src/index.ts:11-29 (registration)

  Registers the 'whois_domain' tool with the MCP server, including name, description, input schema, and inline handler function.

  server.tool(
    'whois_domain',
    'Looksup whois information about the domain',
    { domain: z.string().min(1) },
    async ({ domain }) => {
      try {
        const result = await whoisDomain(domain);
        return {
          content: [{ type: 'text', text: `Domain whois lookup for: \n${JSON.stringify(result)}` }],
        };
      } catch (err: unknown) {
        const error = err as Error;
        return {
          content: [{ type: 'text', text: `Error: ${error.message}` }],
          isError: true
        };
      }
    }
  );

• src/index.ts:6-6 (helper)

  Imports the whoisDomain function from the external 'whoiser' library, used by the tool handler.

  import { whoisAsn, whoisDomain, whoisTld, whoisIp } from 'whoiser';