402utils

Domain availability and expiry intelligence via RDAP, the WHOIS successor. Queries the authoritative registry for any RDAP-enabled TLD: free domains return registered:false, taken ones return registrar, creation and expiry dates, nameservers and EPP status codes. TLDs without RDAP coverage return supported:false. Built for agents that buy, monitor or vet domains.

Fetch an RSS 2.0 or Atom feed and return clean JSON: feed title, link and description, plus items with title, link, ISO-8601 publishedAt, summary and author. Handles both formats and normalises the dates. The caller-supplied URL is SSRF-checked; the fetch is capped at 2 MB and 8 s.

Echoes back the JSON body you send, with a server timestamp. Useful for verifying your x402 client integration end to end.

Compute cryptographic hashes / checksums of a string or of raw bytes (base64). Returns lowercase hex for each requested algorithm: sha256 (default), sha512, sha1, md5. SHA via native Web Crypto; md5 and sha1 are offered for legacy interop only and flagged — not for security. POST so the input never lands in a URL/log. Verification/checksums only, not a hash cracker.

Colour utilities: ?op=convert (default) turns any hex/rgb()/hsl()/CSS-name into hex, rgb, hsl, hsv, alpha, relative luminance and exact CSS name; ?op=contrast with ?fg=&bg= returns the WCAG 2.x contrast ratio and AA/AAA pass/fail for normal & large text plus UI components (accessibility / EAA); ?op=palette derives complementary, analogous, triadic, tints and shades. Send hex without '#'.

Enriched quote for an x402 endpoint: probes it unpaid (never pays, SSRF-checked), decodes {price, asset, network, payTo}, then compares the USD price against the live Bazaar market for its category → {marketContext:{category, medianForCategory, cheaperThanMarket}}. Not just how much, but whether it's fair. Market context is best-effort; the decoded quote returns even if the Bazaar read fails. Neutral — our own endpoints are never featured.

Validate an email address before you accept a signup or send to it: RFC 5322 syntax, whether the domain resolves and its MX records, whether it is a disposable/throwaway domain (community blocklist), and whether it is a role account (info@, support@…). DNS is checked over DoH. No SMTP probing (intrusive and spammy), so a true 'domainExists' does not guarantee the mailbox exists.

Capture a screenshot of any public web page with a headless Chrome browser. Set the viewport, grab the full scrollable page or just the fold, and choose PNG, JPEG or WebP with an optional quality. Returns the raw image bytes — ideal for link previews, thumbnails, visual monitoring and archiving. No browser to run, pay per capture.

TARGET2/T2 settlement calendar — the SEPA banking calendar, to predict when a euro transfer settles. TARGET is closed on weekends + six fixed days (New Year, Good Friday, Easter Monday, 1 May, 25 & 26 Dec). ?year= lists the closing days; ?date= says whether it settles (and the next open day); ?date=&addBusinessDays=N returns the value date N settlement days away. The SEPA counterpart of /v1/business-days.

Render HTML or a public web page into a pixel-perfect PDF using a headless Chrome browser. Send inline `html` (invoices, receipts, reports, tickets) or a `url` to snapshot; control paper size, orientation, margins, background graphics and scale. Returns the raw application/pdf bytes — no signup, no browser to run, pay per document.

Validate and normalize a phone number with full Google libphonenumber metadata: strict validity against each national numbering plan, E.164 / international / national formats, country detection (correct across shared codes like +1 and +44) and line type (mobile, fixed_line, toll_free, voip…) where the plan distinguishes it. Pass ?country=FR to parse national formats. Local. ?attest=1 → Ed25519-signed.

Test a regex against one or many inputs, safely. Send {pattern, flags?, input|inputs[], mode?}: 'match' returns the first match + capture groups, 'matchAll' every match, 'replace' the rewritten string (needs {replacement}). A mandatory ReDoS guard statically rejects catastrophic patterns (nested quantifiers, `.*.*$`, backrefs) BEFORE running — on Workers no timeout can stop a runaway regex. For agents that generate and dry-run regexes.

Rerank passages by relevance to a query via Cloudflare Workers AI (@cf/baai/bge-reranker-base). Send {query, documents[] (≤50, each ≤4000 chars), topK?}; returns [{index, score}] best-first — the missing link after embed/chunk, keeping the top chunks before a costly LLM call. Score is the model's relevance score (higher = better), named as it only compares within this model. Unavailable binding → 503, unbilled.

Turn free multilingual text into a URL-safe slug. Transliterates Latin (all diacritics: é→e, ü→u), Cyrillic and Greek to ASCII; deterministic. Options: separator (default '-'), lowercase (default true), maxLength (cuts on a word boundary), transliterate (default true; false keeps letters of any script as a Unicode slug). Complex scripts (CJK, Arabic, Hebrew) are NOT romanised and are dropped.

Convert a value between units in the same physical dimension: length, mass, volume, temperature, area, speed, data, energy, pressure, time, angle. Factors are exact SI constants (NIST SP 811) — deterministic, unlike an LLM's guess. Pass ?category=currency to convert ISO 4217 amounts at ECB reference rates instead (informational, not for pricing). Unknown units → 400 with a suggestion.