diff --git a/src/openai-service.ts b/src/openai-service.ts
index e76bdd2..c12f42c 100644
--- a/src/openai-service.ts
+++ b/src/openai-service.ts
@@ -265,77 +265,27 @@ async function callNamecheapApi(funcName: string, funcArgs: Record<string, any>,
       }).then(r => r.json());
     }
     case 'whois_lookup': {
-      // 공개 RDAP API 사용 (누구나 조회 가능)
+      // 자체 WHOIS API 서버 사용 (모든 TLD 지원)
       const domain = funcArgs.domain;
       try {
-        // TLD별 RDAP 서버 (먼저 직접 시도)
-        const tld = domain.split('.').pop()?.toLowerCase();
-        const rdapServers: Record<string, string> = {
-          'com': 'https://rdap.verisign.com/com/v1',
-          'net': 'https://rdap.verisign.com/net/v1',
-          'org': 'https://rdap.publicinterestregistry.org/rdap',
-          'io': 'https://rdap.nic.io',
-          'me': 'https://rdap.nic.me',
-          'info': 'https://rdap.afilias.net/rdap/info',
-          'biz': 'https://rdap.nic.biz',
+        const whoisRes = await fetch(`https://whois-api-kappa-inoutercoms-projects.vercel.app/api/whois/${domain}`);
+        if (!whoisRes.ok) {
+          return { error: `WHOIS 조회 실패: HTTP ${whoisRes.status}` };
+        }
+        const whois = await whoisRes.json() as any;
+
+        if (whois.error) {
+          return { error: `WHOIS 조회 오류: ${whois.error}` };
+        }
+
+        // raw WHOIS 응답을 그대로 반환 (AI가 파싱)
+        return {
+          domain: whois.domain,
+          available: whois.available,
+          whois_server: whois.whois_server,
+          raw: whois.raw,
+          query_time_ms: whois.query_time_ms,
         };
-
-        let rdapRes: Response | null = null;
-
-        // 1. TLD별 직접 서버 시도
-        if (tld && rdapServers[tld]) {
-          try {
-            rdapRes = await fetch(`${rdapServers[tld]}/domain/${domain}`);
-          } catch {
-            rdapRes = null;
-          }
-        }
-
-        // 2. 실패하면 rdap.org 프록시 시도 (리다이렉트 따라가기)
-        if (!rdapRes || !rdapRes.ok) {
-          const proxyRes = await fetch(`https://rdap.org/domain/${domain}`, { redirect: 'manual' });
-          if (proxyRes.status === 302 || proxyRes.status === 301) {
-            const location = proxyRes.headers.get('location');
-            if (location) {
-              rdapRes = await fetch(location);
-            }
-          } else if (proxyRes.ok) {
-            rdapRes = proxyRes;
-          }
-        }
-
-        if (!rdapRes || !rdapRes.ok) {
-          return {
-            error: `WHOIS 조회 실패: .${tld} TLD는 RDAP를 지원하지 않습니다.`,
-            suggestion: '지원 TLD: com, net, org, io, me, info, biz'
-          };
-        }
-        const rdap = await rdapRes.json() as any;
-
-        // RDAP 응답 파싱
-        const result: Record<string, any> = {
-          domain: rdap.ldhName || domain,
-          status: rdap.status || [],
-        };
-
-        // 등록일/만료일
-        for (const event of rdap.events || []) {
-          if (event.eventAction === 'registration') result.created = event.eventDate;
-          if (event.eventAction === 'expiration') result.expires = event.eventDate;
-          if (event.eventAction === 'last changed') result.updated = event.eventDate;
-        }
-
-        // 네임서버
-        result.nameservers = (rdap.nameservers || []).map((ns: any) => ns.ldhName).filter(Boolean);
-
-        // 등록기관
-        for (const entity of rdap.entities || []) {
-          if (entity.roles?.includes('registrar')) {
-            result.registrar = entity.vcardArray?.[1]?.find((v: any) => v[0] === 'fn')?.[3] || entity.handle;
-          }
-        }
-
-        return result;
       } catch (error) {
         return { error: `WHOIS 조회 오류: ${String(error)}` };
       }