the402 x402 endpoint directory

Crypto news API for agents: search recent attributed crypto headlines (Bitcoin, Ethereum, DeFi, Web3) through the GDEL

Locus public pay-per-use API

Extract one or many values from a JSON blob by dot/bracket path (e.g. items[2].name, meta.total). Pull just the fields

Convert integers (1-3999) to Roman numerals and Roman numerals back to integers, with strict validation.

Return a month as a grid of week rows (weeks start Monday or Sunday), plus the weekday of the 1st, the day count, and

Parse a semantic version, compare two versions, test a version against a range (^, ~, >=, <, exact), and compute the n

Convert a date to its ISO 8601 week-date (year, week number, weekday), ordinal day-of-year, quarter, and days remainin

Generate UUID v4/v5/v7, ULID, or NanoID (single or batch), or parse/validate an existing id and extract its embedded t

Apply NFC/NFD/NFKC/NFKD normalization and report per-codepoint name, category and script, flagging mixed-script (possi

Encode or decode a string across base64, base64url, base32, hex, URL/percent, HTML entities, and data-URIs in one call

Percent-of, percent-change, tip, and X-is-what-percent-of-Y in one endpoint.

Convert length, mass, volume, data-size, time, speed, or temperature between units.

Score a password by length, character classes, and estimated entropy (bits).

Classify an IPv4/IPv6 address: version, private/loopback/global, reverse pointer.

Difference between two dates/times in days, hours, minutes, and business days.

Convert between Unix epoch (s/ms) and ISO-8601; report weekday and UTC offset.

Break a URL into scheme, host, port, path, query params, and fragment.

Validate a number by the Luhn checksum and detect the card brand.

Generate placeholder text by paragraphs, sentences, or words.

Convert text between upper, lower, title, sentence, snake_case, camelCase, kebab-case, CONSTANT.

Turn any text into a clean URL slug (ASCII, lowercased, hyphenated).

Decode a JWT header and payload (no signature verification); flags expiry.

Generate v4 (random) or v5 (name-based) UUIDs in a batch; optional uppercase / no-hyphens.

Character, word, sentence, paragraph counts, average word length, and reading time.

Encode or decode a string across base64, base64url, hex, and URL/percent encoding.

Extract one or many values from a JSON blob by dot/bracket path (e.g. items[2].name, meta.total). Pull just the fields

Convert integers (1-3999) to Roman numerals and Roman numerals back to integers, with strict validation.

Convert a date to its ISO 8601 week-date (year, week number, weekday), ordinal day-of-year, quarter, and days remainin

Return a month as a grid of week rows (weeks start Monday or Sunday), plus the weekday of the 1st, the day count, and

Parse a semantic version, compare two versions, test a version against a range (^, ~, >=, <, exact), and compute the n

Transcode text to or from the NATO phonetic alphabet, Morse code, binary, or Grade-1 Braille. Select scheme and direct

Apply NFC/NFD/NFKC/NFKD normalization and report per-codepoint name, category and script, flagging mixed-script (possi

Generate UUID v4/v5/v7, ULID, or NanoID (single or batch), or parse/validate an existing id and extract its embedded t

Encode or decode a string across base64, base64url, base32, hex, URL/percent, HTML entities, and data-URIs in one call

Percent-of, percent-change, tip, and X-is-what-percent-of-Y in one endpoint.

Convert length, mass, volume, data-size, time, speed, or temperature between units.

Score a password by length, character classes, and estimated entropy (bits).

Difference between two dates/times in days, hours, minutes, and business days.

Convert between Unix epoch (s/ms) and ISO-8601; report weekday and UTC offset.

Classify an IPv4/IPv6 address: version, private/loopback/global, reverse pointer.

Break a URL into scheme, host, port, path, query params, and fragment.

Validate a number by the Luhn checksum and detect the card brand.

Pretty-print, minify, or sort-keys a JSON string; reports validity and size delta.

Generate placeholder text by paragraphs, sentences, or words.

Convert text between upper, lower, title, sentence, snake_case, camelCase, kebab-case, CONSTANT.

Turn any text into a clean URL slug (ASCII, lowercased, hyphenated).

Character, word, sentence, paragraph counts, average word length, and reading time.

Decode a JWT header and payload (no signature verification); flags expiry.

Generate v4 (random) or v5 (name-based) UUIDs in a batch; optional uppercase / no-hyphens.

Encode or decode a string across base64, base64url, hex, and URL/percent encoding.