the402 x402 endpoint directory

Retirement corpus, years-to-FI and safe withdrawal draw from current savings, contribution, expected return, inflation

Decision procedure for classifying inbound bot and crawler traffic, choosing between serve, challenge, or 402 charge,

Every tracked stablecoin with circulating supply (USD), peg type, peg mechanism, and current price. Ranked by circulat

Total DeFi TVL for every chain DefiLlama tracks, ranked. Query: limit (1-500). Each: name, tvl_usd, token.

TLS peer certificate subject, issuer, expiry, and authorization status for a public host

Resolve multiple DNS record types (A, AAAA, MX, TXT, NS, CNAME) in one call via DoH for deliverability and security ag

Validate email format, disposable-domain heuristics, and live DNS MX records via DoH for outreach and lead-gen agents

Get weather observations (METAR) for a specific airport

Fetch any public RSS or Atom feed and return clean JSON: feed title plus items with title, link, published date, and p

Is this x402 endpoint safe to pay? Vet an unknown seller BEFORE paying: pay/avoid verdict, 0-100 trust score, live 402

Reads the dated futures of Deribit for BTC or ETH and compares each expiry with a spot price whose source is always na

Checks one address on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB Smart Chain against the open verification reg

Takes side, size and size_unit and simulates the fill against the visible book of Binance, Coinbase, Kraken, OKX or By

Reads the liquidation orders OKX publishes for its perpetual swaps, converts every entry into US dollars with the cont

Builds the universe from the Binance spot USDT pairs ranked by 24 hour turnover and states that criterion in universe_

Reads a Chainlink aggregator directly from the chain, pulls Pyth and RedStone, queries public exchange tickers and der

Live nationwide feed of active tornado warnings and watches from the official US alerting authority — zones affected,

All tornado warnings and tornado watches currently in effect anywhere in the United States, with the specific counties

Nationwide tornado warning and watch feed: every currently active US tornado warning or tornado watch — affected zones

Tornado alert API: every tornado warning and tornado watch currently active anywhere in the United States — affected z

Live nationwide feed of active dangerous-heat alerts from the official US alerting authority — Heat Advisory, Extreme

All Heat Advisories, Extreme Heat Warnings, and Excessive Heat Warnings currently in effect anywhere in the United Sta

Nationwide heat alert feed: every currently active US Heat Advisory, Extreme Heat Warning, and Excessive Heat Warning

Heat alert API: every Heat Advisory, Extreme Heat Warning, and Excessive Heat Warning currently active anywhere in the

Real-time cryptocurrency price data

Recent FEMA disaster declarations for a US state (openFEMA): title, incident type, declaration type, and date — the fe

NHTSA safety recalls for a vehicle by make/model/year: campaign number, affected component, summary, consequence, and

Search FDA drug recall / enforcement records (openFDA): recalling firm, classification (Class I/II/III), reason, distr

Search US federal election candidates via the FEC: name, party, office (House/Senate/President), state, incumbent/chal

Look up US colleges by name via the Dept. of Education College Scorecard: state, out-of-state tuition, overall admissi

Top reported adverse reactions for a drug from the FDA FAERS database (openFDA), ranked by report count — a fast read

Search FDA medical-device recall / enforcement records (openFDA): recalling firm, classification (Class I/II/III), rea

Search FDA food recall / enforcement records (openFDA): recalling firm, classification, reason (allergen, contaminatio

Combine PNG/JPEG images into a single PDF, one image per page. Body: {"urls":["https://…/1.png","https://…/2.jpg"]}. R

Combine several PDFs into one, in order. Body: {"urls":["https://…/a.pdf","https://…/b.pdf"]}. Returns the merged PDF

Confirm a USDC payment actually settled: given a tx hash (and network), returns whether it succeeded and the USDC tran

Pools read straight off Base seconds after they exist, before any indexer has them: the launched token address, whethe

SSRF-safe public GET with status, headers, and size-capped JSON/text body for agent tool use

Decode a 17-char VIN via NHTSA vPIC for $0.004 USDC with make/model/year and attribution.

Fetch an RSS 2.0, Atom, or RSS 1.0 feed URL and parse it into normalized JSON: feed title/description/link plus items

Read-only JSON-RPC against Ethereum, Base, Polygon, Arbitrum, or Optimism with built-in multi-endpoint failover — one

Live GBP to EUR exchange rate (British Pound / Euro). Zero-param: GET returns current rate. 英镑兑欧元实时汇率。ポンド/ユーロ 為替レート。Ti

Live USD to GBP exchange rate (US Dollar / British Pound). Zero-param: GET returns current rate. 美元兑英镑实时汇率。米ドル/ポンド 為替レ

Analyze the short-term base fee trend on Base or Ethereum to advise whether to send a transaction now or wait - a cost

Onchain ETH, BTC or LINK USD price straight from Chainlink mainnet oracles with round id, update time and the feed add

Live OP to USD price (Optimism / US Dollar). Zero-param: GET returns current price. Optimism美元实时价格行情。オプティミズム/米ドル 価格。Pr

Live SOL to USD price (Solana / US Dollar). Zero-param: GET returns current price. Solana美元实时价格行情。ソラナ/米ドル 価格。Precio So

Convert LINK to USD at live price. Pass ?amount=1 for value in US Dollar. Chainlink兑换美元换算。チェーンリンクを米ドルに換算。Convertir Cha

Block info on five EVM chains, latest by default or by number: timestamp, transaction count, gas used, base fee and sa

Convert SUI to USD at live price. Pass ?amount=1 for value in US Dollar. Sui兑换美元换算。スイを米ドルに換算。Convertir Sui a dólar. 수이