10 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Print and mail physical US letters (PDF, HTML, Markdown, DOCX, or image) and postcards via USPS, paid in USDC — with certified/registered proof options and standalone address verification at POST /v1/verify. Integration...
Change watch for dkim selector mail: runs the check, compares it with the result from your previous call for the same domain (kept 90 days) and returns the current answer, changed true/false, the fields that changed with...
DKIM public key for selector "mail" of a domain: looks up mail._domainkey.<domain> (TXT, Cloudflare DoH) and parses v=, k=, key type, public-key length, testing flag and whether the key is revoked (empty p=). Confirms th...
Read public RDAP registration state for a domain: registrar or managing entity when published, registration and expiry dates, and registry status codes. This is a registration/ownership-lifecycle lookup only; it does not...
Check whether an isolated cart can reach checkout and expose blockers without payment. It never logs in, creates an order or finalizes checkout.
DNS MX record lookup: the mail exchanger hosts and priorities for a domain, TTL, plus the detected mail provider (Google, Microsoft 365, Proofpoint, Zoho...). Email routing and provider identification. $0.01 per lookup.
A record of mail.<domain>: looks up the mail host under the domain you give (A via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like mail without enumerating...
AAAA record of mail.<domain>: looks up the mail host under the domain you give (AAAA via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like mail without enumer...
CNAME record of mail.<domain>: looks up the mail host under the domain you give (CNAME via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like mail without enum...
TXT record of mail.<domain>: looks up the mail host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like mail without enumerat...