the402 x402 endpoint directory

Caudri 2009 PIAMA Table III decimal clinical prediction score (max 55.1). Male 4.6, post-term 7.3, medium/low parental

Guilbert 2004 mAPI (PEAK Table I). Positive if 4+ wheeze episodes in one year (one MD-diagnosed) plus 1+ major or 2+ m

Asthma Predictive Index (Castro-Rodriguez 2000, Tucson Children's Respiratory Study). Stringent positive if early freq

Chalut 2000 Preschool Respiratory Assessment Measure (PRAM): five caller-assigned items — oxygen_sat_points (0/1/2), s

GOLD 2017 spirometric grade (Vogelmeier executive summary). Post-bronchodilator FEV1/FVC < 0.70 defines obstruction; t

Hartley 2021 NIVO: consolidation, GCS ≤14, AF, and pH <7.25 score 1 each; time to acidaemia >12 h scores 2; eMRCD 1_to

du Bois 2011 abbreviated four-predictor IPF score from age (<60 → 0, 60–69 → 4, ≥70 → 8), 24-week respiratory hospital

Mahler 1988 modified Medical Research Council (mMRC) dyspnea grade 0-4 as assigned by the caller. Returns the grade, s

Canet 2010 ARISCAT simplified risk score (Table 6, β×10 rounded; Mazo 2014 reprints the same points): age <=50=0, 51-8

Swensen 1997 Mayo Clinic logistic probability of malignancy for a 4-30 mm radiologically indeterminate solitary pulmon

Clive 2014 LENT score for malignant pleural effusion: pleural LDH IU/L (<1500 → 0, >1500 → 1), ECOG 0-4 (0→0, 1→1, 2→2

Rahman 2014 RAPID score for pleural infection: urea (<5=0, 5-8=1, >8=2 mmol/L), age (<50=0, 50-70=1, >70=2), non-purul

Soliman 2018 EUROMACS 9.5-point right-sided heart failure score after continuous-flow LVAD. Five caller-assigned flags

2013 ACCF/AHA heart-failure stages (Yancy) from four caller flags: high risk for HF, structural heart disease, prior o

McKee 1971 Framingham CHF criteria. Definite if two major, or one major plus two minor, are concurrent. Nine major and

NYHA 1994 functional capacity class 1-4 as assigned by the caller (Criteria Committee of the New York Heart Associatio

Hlatky 1989 Duke Activity Status Index. Twelve caller-assigned yes/no items (self-care through strenuous sports); Yes

Adult Wallace 1951 rule of nines: percent TBSA from eight region fractions (0 none, 0.5 half, 1 full) using head 9, ea

Sharma 2009 Edmonton Obesity Staging System (EOSS). Caller-assigned stage 0-4 with the published clinical-picture word

Cadarette 2000 Osteoporosis Risk Assessment Instrument (ORAI). Additive Table 4 score: age ≥75 → 15, 65–74 → 9, 55–64

Koh 2001 Osteoporosis Self-Assessment Tool for Asians (OSTA). Index = trunc(0.2 × (weight_kg − age)) toward zero. Risk

Waist–hip ratio from waist and hip circumference (WHO 2011 expert consultation). WHR = waist_cm / hip_cm after the sam

Relative fat mass (RFM) from height, waist, and sex (Woolcott 2018). Height and waist in meters in the paper; magent a

Current TVL (total value locked) of a specific DeFi protocol, source DefiLlama. Parameter: ?protocol=<slug> (default:

Observed change feed for listed x402 sellers: declared payTo changes with before/after values, other declared-terms ch

Current USD price of one or more cryptocurrencies (ETH price, BTC price, any token by symbol or contract address), sou

Skim Signal: entity formations — new film/TV production-company registrations from official registries in CA, NY, TX,

Live token prices.

Stockfish cloud evaluation for a FEN position. Returns depth, evaluation, and principal variation(s) when Lichess has

Returns South Africa's repo and prime lending rates.

Returns current South African fuel prices for petrol and diesel.

Country metadata — Name/ISO code → currency, capital, calling code, languages, flag.

Packaged food by barcode: ingredients, allergens, traces, additives, Nutri-Score, NOVA group and per-100g nutrition, w

Latest version, licence, deprecation, repository and dependency count for an npm, PyPI or crates.io package. Live from

RDAP domain lookup — status, registration/expiration dates, registrar, name servers (RDAP is the structured, successor

Foreign exchange / currency conversion reference rates (European Central Bank) for a base currency, source Frankfurter

DNS records lookup for a domain: A, AAAA, MX, TXT, NS. A record type with no entries returns an empty array, not an er

Current TVL (total value locked) of an entire blockchain (all protocols combined) — chain-wide TVL, source DefiLlama.

Circulating market cap of the top stablecoins (USDT, USDC, DAI...), highest first, source DefiLlama. Optional paramete

Top DeFi protocols ranked by TVL (total value locked), highest first, source DefiLlama. Optional parameter: ?limit=<n>

Current gas price on an EVM blockchain, read live via a public RPC endpoint (viem) — no API key, no aggregator. Also a

Latest known block (number, timestamp, hash) of an EVM blockchain, read live via a public RPC endpoint (viem) — no API

Email validation — Syntax check + live MX/deliverability + disposable-domain flag.

DNS lookup — Resolve DNS records via DNS-over-HTTPS.

Stock quote — Delayed quote & key stats for an equity/ETF/index.

Business-day math — Count business days in a range, or add/subtract N business days, skipping weekends & holidays.

Galer 1997 Neuropathic Pain Scale from ten caller-assigned 0-10 items (intensity, sharpness, heat, dullness, cold, sen

Barber 2000 ASPECTS: 10 minus 1 for each caller-assigned MCA region with early ischemic change (C caudate, L lentiform

Sansoni 2008 RUIS: five caller-assigned integers for urgency leakage, activity leakage, and drops leakage (each 0-3),

Scalea 1999 FAST four Ps (pericardial, perihepatic, perisplenic, pelvic). Each window is a caller-assigned boolean for