the402 x402 endpoint directory

BitBooth DNS: pay 0.002 USDC, get DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, CAA) for any hostname. Built on

Daily EUR foreign-exchange reference rates (source: European Central Bank). Returns the latest ECB reference rate for

Timezone conversion between IANA zones: convert a datetime (or now) from one zone to another, returning UTC instant an

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Validate a JSON instance against a JSON Schema (draft 7 / 2020-12 subset); returns a valid flag plus per-field errors

Word/sentence/syllable counts, reading time, plus Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG, ARI, and Col

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Token price lookup. Pass coin identifiers as `/v1/defillama/prices/{coins}` (e.g. `coingecko:bitcoin`, `ethereum:0xC02

Fetch an RSS 2.0 or Atom feed and return clean JSON: feed title, link and description, plus items with title, link, IS

Latest crypto news headlines aggregated from major outlets (CoinDesk, Cointelegraph, Decrypt, The Block, Bitcoin Magaz

High-throughput text optimizer for agent data streams. Strips filler, collapses JSON, and densifies repetitive prose t

Convert a timestamp between IANA timezones. Inputs: from, to (e.g. UTC, America/New_York), time? (ISO8601, default now

Bidirectional JSON/YAML transcode for config files, Helm values, K8s manifests, and CI workflows. Give the source stri

Validate and lint JSON, YAML, CSV, or XML. Returns a valid flag, the line/column of the first error when invalid, and

Parse a phone number to E.164, detect its country calling code and region, and validate length against the E.164 stand

Convert amounts between Ethereum denominations (wei, kwei, mwei, gwei, szabo, finney, ether) with exact integer/decima

Compute the WCAG 2.1 contrast ratio between a foreground and background color and report AA/AAA pass/fail for normal a

Parse a User-Agent string into browser, version, engine, OS, device class, and bot/AI-crawler flag (GPTBot, ClaudeBot,

ISO 13616 mod-97 IBAN validation with per-country length rules, plus SWIFT/BIC structure validation and country/bank-c

CIDR math for IPv4/IPv6: network, broadcast, netmask, wildcard, prefix, usable host range and count, mask<->prefix, pl

Regex-based PII redaction: masks emails, phone numbers, SSNs, credit-card numbers, and IP addresses, returning cleaned

Heuristic token-count estimate for a text (character- and word-based) plus an illustrative per-model input-cost projec

Convert a supplied HTML string to clean Markdown: strips scripts/style/nav, preserves headings, bold, italic, links, l

Top-N single tokens and two-word phrases by frequency, with stopword removal and normalized weights.

Spell a number in English words: cardinal, ordinal, or currency (dollars and cents) form for checks and invoices.

Deterministically mask emails, phone numbers, credit-card-like numbers, IPv4 addresses, and US SSNs in text. Returns r

Classify an IPv4/IPv6 address: version, public/private/loopback/link-local flags, integer and hex forms, reverse-DNS p

One-call date math: diff two datetimes, add/subtract an interval, epoch<->ISO conversion, and reformatting via strftim

Compute the keccak256 hash and 4-byte function selector of a signature string, and optionally ABI-decode raw hex calld

Add/subtract business days to a date, or count working days between two dates. Weekend- and custom-holiday-aware (0=Mo

Pull deduped lists of emails, URLs, IPv4 addresses, @mentions and #hashtags out of free text, with counts.

Compute a 64-bit SimHash fingerprint for content, or compare two texts and return the Hamming distance and a 0-1 simil

Generate a solid-color placeholder image with optional centered text (no input image needed).

Compute md5, sha1, sha256, sha512, sha3-256 and crc32 digests of text (or hex bytes) in a single call. Returns hex for

Convert a color across hex/rgb/hsl/hsv/cmyk and (optionally) compute the WCAG contrast ratio and AA/AAA pass against a

Crop an image to a box (left, top, right, bottom in pixels).

Report format, dimensions, mode, aspect ratio, transparency, and byte size of an image.