5 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.
Email deliverability & domain security check — validates SPF, DKIM (multi-selector), and DMARC, detects spoofing and misconfigurations, and returns an A–F email security grade with transparent deductions. Anti-spam / ant...
Site snapshot (SEO + security + tech + email): All four quick checks in one call for a website: on-page SEO score and issues, security headers/TLS grade, tech stack, and the domain's SPF/DKIM/DMARC email authentication....
Validate an email address before sending: syntax, MX, disposable and role account. $0.005 USDC on Base per call. Returns a verdict of ok, risky or undeliverable with syntax, MX, disposable (CC0 list), role account and fr...
Foreign exchange reference rates from the European Central Bank. Base currency plus optional symbols filter. Updated daily on ECB schedule. JSON response. $0.002 USDC per call, pay via x402, no API key.
Email address validation (syntax + domain + MX, no SMTP probing): Validates one email address without contacting the mailbox: RFC 5321 syntax, domain exists, MX / null-MX / implicit-MX, MX hosts resolve, mail provider, d...