nslookup.io MCP Server

Instructions

Implementation Reference

• src/tools.ts:166-182 (handler)

  The handler logic for the dns_propagation tool, which calls the /v1/propagation API.

  async ({ domain, recordType }) => {
    try {
      const result = await apiPost(
        "/v1/propagation",
        { domain, recordType },
        { timeout: 45000 }
      );
      return { content: [{ type: "text", text: formatJson(result) }] };
    } catch (error) {
      return {
        content: [
          {
            type: "text",
            text: `Error: ${error instanceof Error ? error.message : String(error)}`,
          },
        ],
        isError: true,

• src/tools.ts:157-165 (registration)

  The registration of the dns_propagation tool within the MCP server, including its schema definition.

  server.tool(
    "dns_propagation",
    "Check DNS propagation for a domain across 18+ global DNS servers (Cloudflare, Google, Quad9, OpenDNS, regional servers, and authoritative nameservers). Shows if DNS changes have propagated worldwide.",
    {
      domain: z.string().describe("Domain name to check propagation for (e.g. example.com)"),
      recordType: z
        .enum(DNS_RECORD_TYPES)
        .describe("DNS record type to check (e.g. A, AAAA, MX, NS, TXT, CNAME)"),
    },