the402 x402 endpoint directory

Remove all HTML tags, returning the plain text content. Entities are decoded to real characters by default (set decode

Decode HTML entities (named, decimal and hex numeric references) back into plain text.

Encode text to HTML entities so it can be safely embedded in markup. By default uses hex numeric references; set useNa

GlianaAI - pay-per-call AI, market data and identity APIs, no signup, USDC. This resource: tools/exchange-rate. Fiat c

Detect whether a User-Agent belongs to a known bot, crawler, AI agent or HTTP tool, and if so return its name and cate

Classify a User-Agent by device form factor and return convenience booleans (isBot, isMobile, isTablet, isDesktop, isT

Break a User-Agent string into browser, engine, operating system (each with a version) and device type. Unidentifiable

Resolve a Unicode script name (loose matching) to its code point ranges, total size and a small sample. An unknown scr

Resolve a Unicode block name (loose matching) to its range, size, count of assigned characters and a small sample. An

Reverse lookup: resolve a Unicode character name (e.g. 'SNOWMAN', 'CJK UNIFIED IDEOGRAPH-4E2D', 'HANGUL SYLLABLE GA')

Resolve a single code point (given as 'char' or 'codepoint') to its name, general category, block, script and plane. P

Estimate reading and speaking time for a text at configurable words-per-minute rates (defaults: 200 wpm reading, 130 w

Count syllables per word and in total across the text.

Summarise a text's difficulty as a single consensus US grade level (averaging the five grade formulas), plus the Flesc

Compute the standard English readability formulas — Flesch Reading Ease, Flesch–Kincaid grade, Gunning fog, SMOG, Cole

Build braille cells from raised-dot numbers (each cell an array of 1–8). Out-of-range or repeated dots are clean 400s.

Break a braille string into its cells and the raised-dot numbers (1–8) of each cell.

Transcribe a Unicode braille string back to text, honouring capital and number signs. Non-braille or unmapped cells ar

Transcribe text to Unicode braille (grade-1 / uncontracted English braille), with capital and number signs. Characters

Build the flag emoji for an ISO 3166-1 alpha-2 country code from its regional-indicator symbols (e.g. "US" → 🇺🇸). No

Given an emoji character (or any string), return its code points and — if known — its name, category, shortcodes and t

Fuzzy-search emoji by name, shortcode or keyword tag, ranked exact → prefix → substring.

Resolve an emoji by its shortcode (e.g. "smile" or ":smile:") or exact name. Provide exactly one field. Returns the em

Decode international Morse code back into text. Letters are separated by whitespace and words by "/". Unknown Morse se

Encode text into international (ITU) Morse code. Letters are separated by spaces and words by "/". Supports A-Z, 0-9 a

Turn a string of phonetic words back into text ("Sierra Oscar Sierra" → "SOS"). Accepts common alternative spellings (

Spell text using the NATO/ICAO phonetic alphabet (A→Alfa, B→Bravo, …), including digits and spaces (→Space). Character

Break a string into its Unicode code points, each with its U+ notation, decimal value and UTF-8 / UTF-16 byte layout,

Apply a Unicode normalisation form (NFC, NFD, NFKC or NFKD) to a string. Reports whether the text changed and its leng

Decode a base64 byte buffer from one character set and re-encode it into another (utf-8, utf-16le, utf-16be, latin1, a

Guess the character set of a base64-encoded byte buffer: sniffs a byte-order mark, then falls back to ASCII / UTF-8 va

List every ISO 3166-1 alpha-2 country code for which a postal-code pattern is available.

Return the validation regular expression (source and flags) used for a country's postal codes.

Normalise a postal code's casing and whitespace (uppercase, collapse runs of spaces) and report whether the normalised

Check whether a postal / ZIP code is well-formed for a country (ISO 3166-1 alpha-2). A malformed code is a successful

Fuzzy-search countries, currencies and languages by name or code. Scope with `registry` (defaults to all). Matches are

Look up a language by its ISO 639-1 alpha-2 code, ISO 639-2 alpha-3 code (bibliographic or terminologic) or English na

Look up an active ISO 4217 currency by its alphabetic code or numeric code. Provide exactly one field. Returns the cod

Look up a country by its ISO 3166-1 alpha-2 code, alpha-3 code, numeric code or English name. Provide exactly one fiel

Build a chord from a root note and quality (major, minor, dim, aug, maj7, min7, dom7, dim7, half-dim7, sus2, sus4, maj

Build a scale from a root note and type (major, natural-minor, harmonic-minor, melodic-minor, dorian, phrygian, lydian

Transpose a note by a (possibly negative) number of semitones. Result is spelled chromatically with sharps, or flats w

Name the interval between two notes (`to` at or above `from`) — its size in semitones, its diatonic number and its qua

Parse a note in scientific pitch notation (e.g. "A4", "C#5", "Bb3") into its letter, accidental, pitch class (0..11),

Generate a random EUI-48 MAC address. By default it is locally-administered and unicast (safe for testing); set `local

Derive the modified EUI-64 interface identifier from a 48-bit MAC (insert FFFE, flip the U/L bit) and the resulting IP

Reformat a MAC address into the requested notation (colon, hyphen, Cisco dot or bare) and case (lower default or upper

Report the properties of a MAC address encoded in its first octet: unicast vs multicast (I/G bit), universal vs locall

Parse a MAC / EUI-48 or EUI-64 address from any common notation (colon, hyphen, Cisco dot, or bare hex) and return it

Generate a random Luhn-valid TEST card number for the given network (default Visa). For testing only — these are not i