the402 x402 endpoint directory

Fetches live offers from a public bridge aggregator and reports for every option what arrives, what it costs in fees a

Scans the deployed bytecode for function selectors that grant control over trading, and reads the values that can be r

Reads all incoming ERC-20 transfers of one token to one address within a block or time window and matches them against

Reads the public option book summaries of Deribit and aggregates them per expiry. iv_atm is the mark implied volatilit

Web search via Brave Search API

Domain registration status, registrar, dates, and nameservers via RDAP (lite fields only)

Stablecoin FX rates.

Combines coordinate-level current weather from Open-Meteo, nearby worldwide METAR observations and worldwide SIGMETs f

Normalises to −14 LUFS by default, the level the streaming platforms converged on, with named presets for podcast, Eur

Finds silent stretches with ffmpeg level detection and shortens each one that exceeds the threshold length. Pauses are

Time series of a token USD price over a recent window, by chain and contract address or coingecko id, at a chosen inte

HMAC calculator, HMAC-SHA256 SHA512 SHA1 MD5, message authentication code, hash with secret, signed hash, API request

Crypto sector rotation ranked by 24h market cap momentum - which narratives/sectors capital is flowing into vs out of,

Search academic papers across 240M+ publications via OpenAlex (free, no API key, no rate-limit issues). Returns papers

Search recent news articles via Google News. Returns articles with title, source, link, snippet, published_at. Use ?q=

Live perpetual futures funding rate for any crypto symbol from OKX, with annualized rate, next funding time and long/s

Reverse geocode lat/lng to a postal address via OpenStreetMap Nominatim. Returns display name, country, state, city, r

Fetch URL and return all HTTP response headers plus security audit (HSTS, CSP, X-Frame-Options, X-Content-Type-Options

Password breach check via Have I Been Pwned, HIBP API, k-anonymity, SHA-1 hash prefix lookup, known compromised passwo

WCAG contrast ratio calculator, accessibility checker, color contrast, a11y, WCAG 2.1 AA AAA, text contrast, color bli

podcast rss parser, podcast feed parser, iTunes podcast feed, podcast metadata API, podcast episode extractor, podcast

Percentage USD price change of a token over a chosen period, by chain and contract address or coingecko id. For moment

Wallet activity profile - total transactions, NFT and token counts classified into an activity tier (dormant/regular/a

Statistics calculator, mean median mode, standard deviation variance, quartiles, min max range, descriptive statistics

Fetch and parse sitemap.xml. Returns up to 500 URLs with lastmod/changefreq/priority. Auto-detects sitemap index. Buil

Current USD prices for many tokens in one call, each by chain and contract address or coingecko id, from a multi-sourc

Total stablecoin circulating supply per blockchain, ranked, showing where dollar liquidity sits. For routing, market a

Computed technical indicators for any crypto in one call - RSI(14), MACD(12,26,9), Bollinger Bands(20,2) and ATR(14) f

Peg health of a stablecoin: current price versus one dollar, deviation in basis points, and a status flag, plus peg me

Timezone converter, convert time between timezones, UTC to PST EST GMT IST JST, world clock, international time, time

rss feed parser, rss parser, parse rss feed, rss feed parse, parse rss, rss to json, atom feed parser, parse atom feed

Interest calculator, compound interest, simple interest, loan payment, mortgage calculator, annuity, APR APY, future v

SSL/TLS certificate inspection: issuer, subject, valid_from, valid_to, days_remaining, SAN list, fingerprint, signatur

Look up scholarly metadata for any DOI via CrossRef. Returns title, authors, journal, publication date, abstract, cita

Look up arXiv preprint metadata. Returns title, authors, abstract, publish/update dates, categories, PDF URL, DOI, com

Support and resistance levels for any crypto from live OKX candles - classic floor-trader pivots (P, R1-R3, S1-S3) plu

List the ERC20 tokens an address holds on Base with symbol, decimals and formatted balance for each nonzero position.

Translate text between languages via MyMemory (free, 50+ languages). Returns translated text and match quality. Use ?q

Get Hyperliquid vault summaries sorted by APR

Answers 402 via GET. Speaks the v2 dialect over the PAYMENT-REQUIRED header, charges $0.008 on base.

Query Polymarket markets with filtering, sorting, and pagination

Query Kalshi markets with filtering, sorting, and pagination

Search markets across Polymarket, Kalshi, Limitless, Opinion, and Predict.Fun in a single call

List Polymarket events with filtering and sorting

List Polymarket markets with cursor-based keyset pagination (same filters as /polymarket/markets)

List Predict.Fun markets with filtering and sorting

Get the global leaderboard of smart wallets

Query historical Polymarket trade data with flexible filtering

Fear & Greed index history.

Fetch all user positions with filtering and pagination