the402 x402 endpoint directory

Fetch NFT metadata from contract and token ID

Track large on-chain whale transactions

Send an email message

Parse, validate, and normalize a postal address

Get aggregated whale positions on Hyperliquid

Check token contract safety and risk score

Horizon Pulse Signals - real RSI(14), MACD(12,26,9), Bollinger(20,2), and live perpetual funding rates for BTC/ETH/SOL

Observed water levels, tide predictions or current speed and direction for a NOAA CO-OPS station over a date window of

FEMA flood hazard zone, Special Flood Hazard Area status and base flood elevation at a US coordinate.

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

air-quality-oracle: European Air Quality Index with pollen and UV for any city via Open-Meteo aggregation

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

Stablecoin FX rates.

Has this x402 endpoint been trustworthy over time? Track record of one endpoint from continuous independent monitoring

Every Census geography layer containing a US coordinate in one call: state, county, tract, block, place, urban area, c

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

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

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

Web search via Brave Search API

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

Context compressor for AI agents

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

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

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

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

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

Ethereum transaction details and receipt by hash via LlamaRPC. Returns from, to, value, gas, status, block, logs count

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

Query Open Source Vulnerabilities (OSV) database for known CVEs in an NPM package. Returns vulnerability list with sev

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

Chinese stroke count, hanzi strokes, 笔画, 笔画数, kanji stroke count, Chinese character total strokes, 汉字笔画数, Hanzi stroke

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

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

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

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

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

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

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

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

Market share of each major stablecoin as a percentage of total stablecoin market cap. For concentration and macro risk

Total stablecoin market cap over recent days, a macro liquidity gauge for crypto markets. Rising supply often precedes

Business days calculator, working days between dates, weekdays counter, exclude weekends, workday count, business day

Forward geocode an address to lat/lng using OpenStreetMap Nominatim. Returns coordinates, address components, bounding

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