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.

Generate a polished Open Graph / social share image (PNG) from text — no browser, no design tools. Pick a template (article, product, stat), pass a title and optional subtitle, set your brand accent colour and light/dark theme, and get back a crisp 1200×630 PNG ready for og:image, Twitter cards, blog headers and launch posts. Rendered with Satori + resvg; fast and cheap.

Business-day math with real holiday calendars for FR, DE, GB, US, ES, IT, NL, BE (2025-2027, official sources — same datasets as /v1/holidays). Count working/weekend/holiday days in a date range (?from&to&country) or shift a date by N business days (?from&add=10&country). Weekend configurable (?weekend=fri,sat), optional ?region= for Länder/UK divisions. Holidays that suppress a working day are listed by name.

Next occurrences of a cron expression in any IANA time zone, DST-aware via the runtime's ICU tzdb (times skipped by DST shift forward by the gap; ambiguous times fire once). Dialect (croner): 5-7 fields with optional seconds and year, ranges, steps, lists, JAN-DEC/SUN-SAT names, L, W, #, ? and @daily-style aliases. Each occurrence is returned as local ISO with offset plus UTC. Bad expression → 400 naming the offending field.

Convert CSV to JSON with a strict RFC 4180 parser: quoted fields, doubled quotes, delimiters and line breaks inside quotes, mixed CRLF/LF, BOM. Auto-detects comma, semicolon, tab or pipe (or set delimiter). First row becomes object keys; headers:false yields string arrays. Ragged rows and unterminated quotes are repaired and reported in errors[], never a crash. All values stay strings. Send raw CSV text or JSON {csv}. Max 5 MB.

Live market price stats for a kind of x402 service, from the public Bazaar catalog. Pass ?category=vat or ?query=pdf extraction and get {sampleSize, priceUsd:{min,p25,median,max,p75}, networks, examples} in USD — is your price fair, what should you charge? Computed over a live sample of up to 1000 resources; <3 matches returns an honest 'insufficient market data'. Neutral: our own endpoints are never featured.

On-chain + config reliability report for any x402 seller, public data only, computed live. Pass ?payTo=0x… or ?url= (a third-party x402 endpoint) → {onchain:{firstSeenAt,totalIncomingTransfers,uniqueSenders,last30dInflows,note}, config, liveness, discovery} plus factual flags (new_seller, single_sender, config_issues, unreachable). On-chain counts all incoming USDC transfers, not only x402 settlements. No score, no verdict; fails open.

Support 402utils — or use it as a parametric x402 payment-test endpoint: you set the price with ?amount= (USD, clamped to $0.001–$0.05) and the 402 demands exactly that, so you can assert a client pays the precise amount and the on-chain USDC tx matches. After payment returns {thanks, amount, message}. The amount is a pure function of ?amount, identical on the unpaid probe and the paid retry.

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. Purely local; the number is never stored.

Convert Markdown to sanitized HTML that is safe to embed directly in a page, email or app. GFM supported: tables, task lists, strikethrough, fenced code. Output passes a strict tag/attribute allowlist: scripts, styles, iframes, event handlers and javascript: URLs are removed; links keep only http(s)/mailto targets, images only http(s) or base64 image data URIs. Send JSON {markdown} or a raw text/markdown body, max 2 MB. Returns {html}.

Convert a JSON array of objects into a clean RFC 4180 CSV: header row, CRLF records, correct quoting and quote-doubling. Nested objects flatten to dot-notation columns (a.b.c), arrays are JSON-encoded into their cell, and you can select and order columns explicitly. Delimiter: comma, semicolon, tab or pipe. Caps: 100,000 rows, 5 MB body, 20 MB CSV out. Returns text/csv ready for Excel, Google Sheets or a data pipeline.

Country reference card by ISO code (alpha-2/alpha-3/numeric) or English name: ISO 3166 codes, official name, current ISO 4217 currency (Bulgaria = EUR since 2026-01-01), dialling prefix, IANA ccTLDs (incl. IDN), languages, EU/EEA/Schengen/euro-area membership and the EU VAT prefix (Greece = EL). 56 countries: EU-27, EEA/EFTA, GB, US + 24 majors. Compiled from ISO/IANA/ITU/europa.eu sources, dated `asOf`.

ISO 11649 RF creditor reference (SEPA structured reference) — validate or generate. ?ref=RF18539007547034 checks the ISO 7064 mod 97-10 checksum and format (RF + 2 check digits + up to 21 alphanumerics); ?generate=539007547034 computes the check digits and returns the full RF reference with print formatting. Complements iban-check and vat-check for SEPA invoicing agents. Purely local, instant.

Structural card-number check before hitting a PSP: Luhn checksum, network detection from public IIN prefixes (visa, mastercard, amex, discover, jcb, diners, unionpay) and per-network length validation. POST body on purpose: the number never appears in a URL, so it stays out of request logs and x402 payment metadata — never stored, logged or echoed back. No BIN/issuer lookup (BIN databases are licensed): well-formed does not mean the card exists.

Convert XML to clean JSON. POST raw XML (XML or text/plain Content-Type) or a JSON envelope {xml, alwaysArray}. Attributes land under "@_" keys, mixed-content text under "#text", repeated siblings become arrays, and alwaysArray forces arrays for listed tags even on a single occurrence. Numeric character references decode. DTD entities and DOCTYPE internal subsets rejected (anti-XXE / billion-laughs). Max 5 MB.

Convert between YAML and JSON in one call. to:"json" parses a YAML document (config files, docker-compose, Kubernetes manifests, CI pipelines) into a plain JSON value; to:"yaml" renders any JSON value as clean block-style YAML. Hardened: safe core schema (tags like !!js/function never execute), alias bombs rejected, one document per call, parse errors return line/column. YAML input up to 2 MB UTF-8.

Compute the diff between two texts (a → b) — no git needed. Returns a standard unified patch (line-oriented in both modes, applies with git apply or patch), added/removed counts, and in word mode a token-level change list for inline highlighting (capped at 2000 entries). CRLF line endings and missing trailing newlines are preserved byte-exactly. Caps: 1 MB UTF-8 per input; pathologically divergent inputs return 422 diff_too_complex.

Generate an EPC QR code (SEPA Credit Transfer / « Girocode », EPC069-12) — the QR a banking app scans to pre-fill a transfer, the payment companion to an invoice. Body { name, iban, amount?, bic?, purpose?, remittance? | reference? (RF) }. Returns PNG (default), SVG, or the raw EPC text. IBAN + RF are validated; strict EPC encoding (order, lengths, ≤331 bytes, level M). EUR only. Not a payment initiation — just the encoded data.

Look up a business in the public Peppol Directory — where to route an e-invoice (the BT-34/49 electronic address). ?id= (a Peppol id like 0225:992412536, or a value to search) or ?country=FR&name=. Returns { found, count, participants:[{peppolId, name, country, documentTypes[], schemes[]}] }. Unknown id → { found:false }. Directory down → 503, unbilled. Public source, 1h cache.

Validate a Factur-X / ZUGFeRD invoice: send PDF bytes, JSON { url } or { pdfBase64 }, or raw CII { xml }. Returns a rule-based report — PDF/A-3 structure, EN 16931 CII anchors, arithmetic rules (BR-CO) and French PA « Flux 2 » checks (BR-FR) — with the detected profile. Structural + heuristic, not a certified conformance service. ?attest=1 → Ed25519-signed audit trail.