the402 x402 endpoint directory

Christenson 2006 Vancouver Chest Pain Rule. early_discharge_eligible is true when the initial ECG is not abnormal, 2-h

HEAR score for emergency chest pain from age and caller-assigned history, ECG, and risk factors (each 0-2, max 8). No

D'Amico 1998 JAMA clinically localized prostate-cancer groups from caller-assigned T (t1c, t2a, t2b, t2c), Gleason 2-1

Cooperberg 2005 UCSF CAPRA preoperative score (Table 1). Caller-assigned PSA (>=2.1-6 0, >6-10 1, >10-20 2, >20-30 3,

Frank 2002 SSIGN (stage, size, grade, necrosis) for clear cell RCC after radical nephrectomy. 1997 TNM: pT1 0, pT2 1,

Kirsch 2014 VURx for children <2 years with primary vesicoureteral reflux. Caller-assigned vur_timing (voiding 1, late

De Jong 2013 MACOCHA from seven caller-assigned flags: Mallampati III or IV (5), OSA (2), reduced cervical mobility (1

Sedrine 2002 Osteoporosis Index of Risk (OSIRIS). Index = (-0.2 × age) + (0.2 × weight_kg) + 2 if current HRT + (-2) i

Web scraping API for AI agents — extract clean text and metadata from one safe public HTTPS URL in a single x402 call.

Provider trust and domain verification API — inspect public DNS/IP, HTTPS/TLS, first-party organization identity, soci

Structured Google search results (organic listings, direct answer box, related questions) — for an agent that needs to

Wikipedia article summary (extract, short description, thumbnail image, canonical link) for a given title — CC BY-SA c

Read any public web page and return its main article content as clean Markdown (readability extraction, boilerplate/na

Total USDC circulating supply (all chains combined), in USD, source DefiLlama. No parameters.

Current SOL (Solana) price in USD, source DefiLlama. No parameters.

npm package downloads, current version, and license — latest version, license, and last week's download count for an n

Current top N Hacker News stories (title, url, score, author, comment count) — tech/startup news ranking. Optional par

Current gas price on Ethereum mainnet, read live via a public RPC endpoint — no API key, no aggregator. No parameters.

ERC-20 name, symbol, decimals and total supply read from the contract itself, and confirmation the address has code on

Unmet-demand finder: compares observed USDC spend against how many sellers actually serve each category, with recent m

RDAP whois — Structured domain/IP registration data (modern whois).

Crypto spot price — Spot price for a crypto asset in a fiat/crypto quote currency.

Air quality — US & European AQI plus pollutant concentrations by coordinate.

Timezone by coordinate — Coordinates → IANA timezone, UTC offset, local time.

Whether a transaction succeeded, failed or is pending, with block, sender, recipient, value, gas used and the fee actu

Web scraping and extraction credit pack for AI agents: 10 accepted public-URL clean-text reads at a micro-price with n

FX conversion credit pack: 100 low-cost currency conversions using official ECB reference-rate data for autonomous age

Fact verification API for market data — cross-check a ticker against live provider evidence and return an evidence-bac

Current ETH (Ethereum) price in USD, source DefiLlama. No parameters.

Current BTC (Bitcoin) price in USD, source DefiLlama. No parameters.

Stats for a public GitHub repository: stars, forks, open issues, last push date, main language, license. Parameter: ?f

Public holidays — Public holidays for a country & year.

Postal code lookup — ZIP/postal code → place(s) & coordinates.

Dutch address lookup by postcode + house number, or reverse by coordinates. Send the parameters in a JSON request body

Extract raw artifacts from images: OCR text and detected objects. No interpretation, just clean machine-readable data.

Technical service bulletins for a vehicle or a fault code — the fixes a manufacturer has already documented for a know

Just-In-Time GBLIN→USDC calldata. Returns two ready-to-broadcast steps (sellGBLINForEth + WETH→USDC swap) sized to cov

What a host says about itself: status, server, content type, caching, and which security headers are set or missing.

MCPFax markets — Polymarket markets (polymarket_markets). Price: $0.001 USDC per call on Base.

MCPFax markets — Manifold markets (manifold_markets). Price: $0.001 USDC per call on Base.

MCPFax markets — DeFi protocol detail (defi_protocol). Price: $0.001 USDC per call on Base.

Fetch a public page and return plain text (HTML stripped) for research, RAG, and summarization agents

Live wallet balance bundle for agents: native ETH + USDC ERC20 balances + nonce on Base (and Ethereum when configured)

Per-venue basis for one crypto perpetual — mark versus index price, basis_bps = (mark−index)/index×10000, and contango

Follow a URL's redirect chain hop by hop: every step, the final destination, whether it crossed hosts, and a copy with

Resolve a local business name + address to its website domain, phone, category, and operating status with a match conf

Notarize AI output in bulk: one signed Ed25519 attestation of the model response per record for up to 20 AI inferences

Fetch any public URL and return clean, structured content: title, meta description, main text, markdown, headings, out

Live foreign-exchange rates for one or many currency pairs (e.g. EUR/USD, EUR/RON, USD/JPY) with mid, indicative bid/a

Generate one English sentence describing a supplied image.