Is this crypto firm authorised under MiCA in the EU? One call checks the official ESMA register of crypto-asset service providers (CASP) by company name or LEI: authorised or not, home me…

Trace the redirect chain of a URL to its final destination without downloading page bodies: every hop with its status code, time and Location header, the final URL, whether the domain changed, and loop detection. Useful before trusting a short link or an ad link. Query: ?url=https://bit.ly/…

Financial identifier validation: IBAN validation (format, length per country, mod-97 checksum), IBAN repair suggestions for OCR errors, EU VAT number format validation. Deterministic, instant, no third-party calls — for invoice, payment and onboarding agents.

Convert CSV text (first row = headers) into a JSON array of row objects. Parse spreadsheets and exports into structured data.

x402 validator: will Coinbase Bazaar list your x402 endpoint, and can a client pay it? Why will Coinbase not list your x402 endpoint, and can a standard client pay it? Pass ?url= (and &method=POST for a POST route). We read its 402 as a client does, check what Coinbase's facilitator and Bazaar enforce (accepts[0] network, the $0.001 minimum, descriptions over 500 characters, a bazaar schema that must describe info, query numbers typed as strings, routeTemplate, exposed headers), and ask…

Convert any string into a URL slug: ASCII, lower-cased, dashes for separators. For permalinks, filenames and stable ids.

TLSA records for a domain as answered by NextDNS (DNS over HTTPS): the records, TTL, response code (NOERROR/NXDOMAIN/SERVFAIL), whether the resolver validated DNSSEC, and the resolver's answer time. Compare resolvers to spot propagation lag, filtering or split-horizon answers. $0.01 per lookup.

TXT record of remote.<domain>: looks up the remote 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 remote without enumerating subdomains. $0.01 per lookup.

A record of autodiscover.<domain>: looks up the autodiscover 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 autodiscover without enumerating subdomains. $0.01 per lookup.

Google Maps Place Details (Full)

CNAME record of mx.<domain>: looks up the mx 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 mx without enumerating subdomains. $0.01 per lookup.

Render CommonMark + GFM markdown to HTML.

Generate a QR code PNG (returned base64-encoded in JSON) for any text or URL using default black-on-white styling.

DKIM public key for selector "namecheap" of a domain: looks up namecheap._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 that mail signed with the namecheap selector will verify. $0.01 per lookup.

About the .aero top-level domain: registry operator, type (generic, country-code, sponsored), IANA/RDAP details, WHOIS server, creation date, DNSSEC signing status and the registry's nameservers. Registration research and TLD-policy checks for .aero. $0.01 per call.

SIPS service discovery (_sips._tcp.<domain>): SRV records with priority, weight, port and target host, from Cloudflare DoH. Tells a client where the domain's sips service lives without guessing hosts. $0.01 per lookup.

CNAME record of imap.<domain>: looks up the imap 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 imap without enumerating subdomains. $0.01 per lookup.

RFC 3986 percent-decode an input string back to its original text (%20 to space, %2F to /). Reverse of url-encode.

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CNAME record of gitlab.<domain>: looks up the gitlab 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 gitlab without enumerating subdomains. $0.01 per lookup.