heade.rs

Look up a domain, IP address or network (AS number) on heade.rs and return its report. For a domain or IP address: where it's hosted (network, BGP prefix, RPKI, location, cloud region, CDN), registration (RDAP/WHOIS), DNS records and DNSSEC, email security (SPF, DMARC, MTA-STS, BIMI), the certificate, a security-header grade and the response headers, the website's tech stack with end-of-life and vulnerability checks, which AI crawlers it lets in and what it offers agents, and open ports from Shodan InternetDB. For an AS number: its prefixes, RPKI and ASPA, upstreams and peers, internet exchanges and registration. Data is live or mirrored within the hour; a lookup takes a few seconds.

{'type': 'object', 'required': ['query'], 'properties': {'query': {'type': 'string', 'description': 'A domain (example.com), IPv4 or IPv6 address (1.1.1.1, 2606:4700::1111), AS number (AS13335) or URL (the hostname is used).'}, 'format': {'enum': ['markdown', 'json'], 'type': 'string', 'default': 'markdown', 'description': 'markdown (the default, about 3,000 tokens for a domain) or json (every field, several times longer).'}}, 'additionalProperties': False}