Free domain intFree Domain Intelligence API for developers. GET /v1/domain/check?domain=example.com returns DNS (A, AAAA, MX, NS, TXT, CNAME), email security (SPF/DMARC/MX), DNSSEC presence, and RDAP registration data as normalized JSON. FastAPI + live demo, no signup, OpenAPI + Postman included.elligence checker for DNS, SPF, DMARC, DNSSEC and RDAP.
