the402 x402 endpoint directory

European Central Bank reference exchange rates for any past date or date range (business days since 1999-01-04), via f

Latest observed 15-min records from RTE's eCO2mix national real-time dataset (ODRE portal, Licence Ouverte 2.0). Per r

Near-real-time pump prices (EUR/L) for French gas stations from the official roulez-eco feed (data.economie.gouv.fr, u

Current levels of the three ECB key interest rates -- main refinancing operations (MRR_FR), deposit facility (DFR) and

Monthly HICP inflation as annual rate of change (%) from Eurostat dataset prc_hicp_manr, the official primary source.

Euro Short-Term Rate (ESTR), the official euro overnight benchmark, direct from the ECB Data Portal (dataset EST, publ

Live Ethereum mainnet gas pricing from PublicNode RPC: next-block base fee, 25/50/75th-percentile priority tips over t

Live DNS records resolved via Cloudflare 1.1.1.1 DNS-over-HTTPS (public facts, real time). Query: ?name=anthropic.com&

Current Hacker News front page via the official Firebase API, fanned out and merged into one payload: id, title, url,

Hourly EPEX Spot day-ahead electricity prices in EUR/MWh from the aWATTar market data API, normalized to ISO 8601 UTC

Official Bank of Canada Valet observations, normalized JSON. Query: ?series=FXUSDCAD,FXEURCAD&recent=5 (1-10 comma-sep

Resolves an ISBN-10 or ISBN-13 to a normalized bibliographic record from Open Library (Internet Archive): title, autho

Latest METAR observation, decoded, for any ICAO airport worldwide (NOAA AviationWeather.gov): wind direction/speed/gus

Convert an image to grayscale (or sepia).

Convert an image to grayscale (or sepia).

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Skim: clean reader — URL to agent-ready markdown + metadata, ~4x smaller than raw HTML

Diff two JSON documents structurally. POST {a, b} returns every added, removed, and changed path with old/new values,

URL status checker: send any web address and get back its HTTP status code, response latency in milliseconds, and key

Linear algebra API: determinant, inverse, transpose, eigenvalues, multiply, or add matrices up to 50x50 with structure

Live GBLIN keeper bounty availability on Base: whether a profitable incentivizedRebalance exists right now, expected E

GBLIN treasury analytics on Base: total supply, NAV, basket dynamic weights (cbBTC/WETH/USDC), stability fund and keep

Poster-only: approve a submitted bounty result: POST {id}. Credits the worker (minus 20% house fee) from the escrowed

Geospatial computation. op=distance (lat1,lon1,lat2,lon2 -> km and miles) or op=geohash (lat,lon,precision? -> geohash

Compute future value of a principal under compound interest. Returns future value, total interest earned, and the effe

Safely evaluate an arithmetic expression (+ - * / % ^ and parentheses). No code execution — a real parser, not eval.

Convert a JSON array of objects to CSV. Nested objects are flattened to dot-path columns.

Check accrued tollbooth earnings for a payout wallet: credits owed and USD equivalent. Earnings accrue from /toll/fetc

A durable timer for stateless agents. POST {interval_seconds, count} registers a schedule; GET ?id= returns the ticks

A FIFO mailbox for handing data between agents. POST {channel, message} enqueues JSON; GET ?channel= pops the oldest m

Durable key/value memory for stateless agents, private to your paying wallet. POST {key, value, ttl?} to store JSON; G

Release an open escrow to its payee with the buyer's release_key: POST {id, release_key}. The payee is credited minus

Call ECB FX rates through our metered gateway: our rate-limit budget and a 3600s cache absorb your polling, so your lo

Validate a value. Body: {type, value, schema?}. type = luhn (credit-card number), iban (bank account), email, or json_

The table + column schema for the onchain-sql tool — every queryable table (base.events, base.transactions, base.block

All token balances for any address in one call, from Coinbase's indexed data API — ERC-20 + native on EVM, SPL on Sola

What happened to my transaction? Status, block, gas used, fee paid - and if it failed, the revert reason in plain text

Access to live crypto market data

Drop-in OpenAI embeddings endpoint — same base_url as /v1/chat/completions, pay per call in USDC, no account or key. P

Mint a bearer session token bound to your wallet. Prepay credits via /credits/buy, open a session here (once), then ca

Poster reclaims the reward of a bounty nobody completed: POST {id}. Full refund, no fee. Poster-only. Works while OPEN

Buyer reclaims the credits locked in an OPEN escrow: POST {id}. Full refund to the buyer, no fee. Buyer-only. If a not

US Stock realtime price for MSTR

Polymarket prediction-market listings. Query: ?limit=1-100. Source: Polymarket Gamma API (free).

Korea Stock realtime price for 005930

Look up full metadata for one indexed book by book_id: title, author, year, subjects, bookshelves, download rank, chun

01Mind listing: weather-data-api

Search recent public posts across OPEN social networks - Bluesky, Hacker News and Mastodon - in one call: author, text

🆕 What sits at a Base address: contract or plain wallet, and if a contract, whether it declares ERC-721 or ERC-1155 v

🆕 totalSupply for any Base token, returned raw and scaled by its decimals, alongside the name and symbol. When a cont