the402 x402 endpoint directory

Jaccard similarity index in [0,1] — the size of the intersection over the union of the two strings' character-bigram s

Sørensen-Dice similarity coefficient in [0,1] over character bigrams — robust to word order and minor edits.

Jaro similarity and the Jaro-Winkler variant (which boosts scores for a shared prefix), both in [0,1]. The prefix boos

Hamming distance — the number of positions at which two EQUAL-LENGTH strings differ — plus a normalized similarity. St

Damerau-Levenshtein distance — like Levenshtein but also counts adjacent transpositions as a single edit — plus a norm

Levenshtein edit distance (insertions, deletions, substitutions) between two strings, plus a normalized similarity in

Measures how much bridged capital sits on a chain and how that changed. bridged_usd is the sum of canonical and extern

Reads the source transaction on chain, identifies the bridge from the contracts it touched, and reports what actually

Reads Approval events of one wallet from the chain, resolves the CURRENT allowance for every token and spender pair wi

Reads the holder list of an ERC-20 token from a public block explorer index and reports concentration. Addresses that

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

Get weather observations (METAR) for a specific airport

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

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

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

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

Convert ETH to USD at live price. Pass ?amount=1 for value in US Dollar. 以太坊兑换美元换算。イーサリアムを米ドルに換算。Convertir Ethereum a

Live XLM to USD price (Stellar / US Dollar). Zero-param: GET returns current price. 恒星币美元实时价格行情。ステラ/米ドル 価格。Precio Stel

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

Convert EUR to JPY at live rate. Pass ?amount=100 for value in Japanese Yen. 欧元兑换日元换算。ユーロを円に換算。Convertir euro a yen. 유

Live ETC to USD price (Ethereum Classic / US Dollar). Zero-param: GET returns current price. 以太经典美元实时价格行情。イーサリアムクラシック/

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

Live ADA to USD price (Cardano / US Dollar). Zero-param: GET returns current price. 艾达币美元实时价格行情。カルダノ/米ドル 価格。Precio Car

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

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

Resolves a prefix to its announcing autonomous systems and puts that answer in context. The current state gives every

Returns a single earthquake in decision-ready form, either by its USGS event identifier or as the most significant eve

Four actions on one endpoint. create opens a slot with its position, length, reserve price and closing time, and retur

Fetches the recent notes of one public key across several relays and measures six independent signals: posting rate pe

Fetches kind 3 contact lists over up to twelve relays. Because kind 3 is replaceable, several relays regularly hold di

Collects kind 9735 zap receipts addressed to one public key over up to twelve relays, merges them by event id and repo

Returns parcel lockers, packstations and staffed pickup points around a point, each with operator, brand, opening hour

Returns public toilets within a radius of a coordinate, sorted by distance, each with what decides whether it is usabl

Returns the neighbouring autonomous systems observed next to a given AS in BGP paths, each with the number of observer

Reports the propagation of a prefix as the fraction of RIS observers that see it, separately for IPv4 and IPv6, becaus

Normalises what a package version declares about where it can run. For npm that is the engines, os and cpu fields plus

Looks at when a package published, not how often, and reports where the pattern breaks. Three kinds of finding, which

A monitor with memory. The first call stores a snapshot of the packages you name and returns the baseline, explicitly

Resolves a package to the source projects it declares, with the provenance of each link stated. This is the honest way

Turns "we are on 2.4.1 and want to be current" into an ordered list of stops. The rule it enforces is that no major ve

Convert SGD to USD at live rate. Pass ?amount=100 for value in US Dollar. 新加坡元兑换美元换算。シンガポールドルを米ドルに換算。Convertir dólar d

Convert EUR to USD at live rate. Pass ?amount=100 for value in US Dollar. 欧元兑换美元换算。ユーロを米ドルに換算。Convertir euro a dólar.

Live ETH to USD price (Ethereum / US Dollar). Zero-param: GET returns current price. 以太坊美元实时价格行情。イーサリアム/米ドル 価格。Precio

Convert AUD to JPY at live rate. Pass ?amount=100 for value in Japanese Yen. 澳元兑换日元换算。豪ドルを円に換算。Convertir dólar austral

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