77 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.
Cron expression explained in plain English with the next run times in any time zone - validates a 5-field cron and handles DST
UUID inspector — parses any UUID (canonical, braces, URN or 32-hex form) and returns its version, variant, embedded timestamp for v1/v6/v7, nil/max flags, hex and URN forms. Use to validate identifiers or recover the cre...
Validate an A2A (Agent2Agent protocol) Agent Card: required fields, skill shape, transport names, capability flags - spec v0.3 structural core. Returns errors, interop warnings, and a normalized summary (skills, interfac...
Use when you need what a web page says: read a public web page as clean text for an AI agent: title, description, main text (scripts, styles and navigation removed) and links. Respects robots.txt.
Inspect one public MCP HTTP endpoint, auto-detect the stateless 2026-07-28 era or fall back to the legacy initialize lifecycle, then normalize tools/list schemas into a deterministic SHA-256 contract fingerprint. Forest...
Check a UUID: send a string and get whether it is a valid UUID plus its version and variant. $0.001 USDC per call on Base.
Validate a JSON document against a JSON Schema (draft-07 subset) and get the list of violations. Supports type, required, properties, items, enum, const, min/max, length, pattern, format, anyOf/allOf/oneOf/not, additiona...
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
Validate, pretty-print (any indentation, 0-8 spaces), or minify JSON, optionally with object keys sorted. canonical: true returns the RFC 8785 (JCS) canonical form - keys sorted, no whitespace, ECMAScript number and stri...
Validate a isbn 10: tests the value against a well-known isbn 10 pattern and returns valid true/false, the pattern used (so you can reuse it), and, when it fails, the first character position that breaks the rule. Format...
Validate a payment card number (Luhn checksum) and detect the brand. Numbers are not stored or logged.
Validate an email address: syntax check plus live MX record lookup on the domain (deliverability signal, not a guarantee).
Cheap structural IBAN validation: ISO 13616 checksum + per-country structure/length. Returns valid plus, on rejection, a granular error_type (invalid_checksum, invalid_length, invalid_structure, invalid_country), the cou...
Convert one bounded fiat amount using the latest successfully fetched European Central Bank daily foreign-exchange reference table. Forest returns the ECB observation date and deterministic cross-rates through EUR. Fresh...
Pretty-print, validate or format a JSON payload and return parse errors with their position. Use to check a JSON string or make it readable.
IBAN validation: mod-97 checksum, country, expected length, bank/branch code split and a formatted version. Payment-form validation without a banking API. $0.01 per check.
Payment card number check: Luhn checksum, card brand from the prefix (Visa, Mastercard, Amex, Discover, JCB, Diners, UnionPay), length validity and masked form. Nothing is stored. Form validation for checkout flows. $0.0...
Phone number parser: E.164 normalisation, detected country from the calling code, national number, a plausibility check on length, and a display format. Handles 50 country codes. Contact data cleanup. $0.01 per number.
EU/UK/CH VAT number format check: verifies the country prefix and the national number pattern (no live VIES query), returning the country and whether the format is plausible. First-line validation for invoices and onboar...
RSS/Atom feed validator: fetches the feed, detects the format and version (RSS 2.0, Atom 1.0, RSS 1.0/RDF), checks well-formedness and required elements (title, link, id/guid, dates), counts items, flags missing/invalid...
Basic HTML lint (no external validator): unclosed or mismatched tags, missing doctype, lang, title, meta charset and viewport, images without alt, links without href or text, duplicate ids, inline event handlers, depreca...
JSON Schema validation without external libraries: validates data against a schema supporting type, required, properties, additionalProperties, items, enum, const, min/max (length, items, properties, numeric, exclusive),...
Sitemap validator: fetches a sitemap or index, checks well-formedness, namespace, type (urlset/sitemapindex), counts entries, validates loc URLs (absolute, same host, no duplicates), lastmod formats, changefreq/priority...
IP address validator: tells you whether a string is a valid IPv4 or IPv6 address, which version, the normalized form and its classification (public, private, loopback, link-local, multicast...). Input validation for form...