the402 x402 endpoint directory

USDA FoodData Central nutrition lookup. Two modes: search (query=cheddar cheese) returns matching foods with fdcId, de

Adjusts a US dollar amount between two dates using the official BLS CPI-U index, returning both index values.

Resolve A and AAAA records for a public hostname via DNS-over-HTTPS (60s cache)

Reads eth_feeHistory over the last ten blocks with reward percentiles 25, 50 and 75, and falls back to eth_gasPrice wh

Asks every known facilitator what it supports and measures how long that answer takes. Reachability, supported chains,

Cryptographic verification of the offer-receipt extension of x402. Accepts a signed offer in eip712, jws or eip191 for

Quotes each stablecoin against real US dollars on Kraken and Coinbase and, separately, against USDT on Binance, OKX an

Turns opaque call data into something an agent can reason about before signing. The method signature is resolved from

Measures the state of one pair over the chosen horizon from the minute candles this hub records itself: annualized rea

Reads the visible order book of one exchange and measures how bid and ask volume sit inside a window of depth_pct arou

Compares the open interest recorded now with the value this hub recorded itself at the start of the window, so both nu

Queries Binance, Coinbase, Kraken, OKX and Bybit in parallel for one BASE/QUOTE pair, four seconds per exchange. An ex

Compares the volume of the most recent completed minute candle with the distribution of minute volumes over the chosen

Queries every public RPC endpoint this hub knows for a chain in parallel — at least three, usually five — and reports

CMS Care Compare lookup for every CMS-certified US hospital (~5k). Lookup by 6-digit CMS Facility ID for direct match,

Query a Qdrant collection for the nearest points to a given vector.

Live IP geolocation: country, city, org, and ASN for fraud and routing agents

QR code generator: turn any text or URL (up to 2000 characters) into a scannable PNG QR code, generated on our own har

Look up an ISO 4217 currency. Pass code (alphabetic like USD, or 3-digit numeric like 840) for the canonical record, o

Curated named color palette with hex codes, mood, and CSS variables.

Returns Base mainnet ETH and USDC balances for an address.

Follow a public redirect chain with per-hop HTTP status (SSRF-safe) for security agents

Current air quality for any coordinate worldwide. Pass lat + lon. Returns the US AQI (+ category Good/Moderate/Unhealt

English dictionary lookup via dictionaryapi.dev (Wiktionary-sourced). Returns full entries with IPA phonetic transcrip

Creative name generator. Categories: fantasy, startup, pet, band.

Query a Pinecone index for the nearest vectors to a given vector.

Daily reference exchange rates from the European Central Bank (via Frankfurter). 30+ major currencies. Pass base = 3-l

Look up or search the global LEI (Legal Entity Identifier) registry — the authoritative ISO 17442 directory of ~2.6M l

Adjust a US dollar amount for inflation between two dates ('what is $100 in 1990 worth today?'). Pass amount, from (YY

Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.

Searches realtime event listings.

https://x402.openwebninja.com/realtime-amazon-data/search

https://x402.openwebninja.com/realtime-local-and-maps-data/local-business-data/search

https://x402.openwebninja.com/realtime-local-and-maps-data/local-business-data/reverse-geocoding

https://x402.openwebninja.com/realtime-finance-data/stock-quote

https://x402.openwebninja.com/realtime-real-estate-data/zillow/search

https://x402.openwebninja.com/realtime-local-and-maps-data/local-rank-tracker/ranking-at-coordinate

Returns the full version history of a package from a single normalised schema that covers seven ecosystems. Versions a

https://x402.openwebninja.com/email-search/search-emails

Email address -> deliverability verdict. Checks syntax, MX record presence, disposable/temp-mail domain match, and SPF

One macro datapoint, cheap: value + prior + delta + date for a single indicator, for agents that want a number rather

Historical price, market cap, and volume data for any coin

Reads the key-tab-value lines of the VE.Direct text protocol, applies the unit scaling that belongs to each key, and d

Every relay is measured twice over. Over WebSocket a genuine REQ query is sent and the connection time, the time to en

Validates the pair of prefix and origin AS against the RPKI repository and returns the verdict together with every ROA

Takes a file digest and answers which released package version it is. Useful for an artefact found in a container laye

Answers the question an agent actually has about a product cycle: for the version in use, is support over, how many da

Turns the release history of a package into a maintenance signal an agent can act on. Four measurements go in: the age

https://x402.openwebninja.com/realtime-web-search/search-full

Matches declared classification tokens against a supplied published dual-use control list. Missing facts are returned