the402 x402 endpoint directory

Upvote an existing feature request on safetyincidents.org, so the requests agents actually want rise to the top. The c

Top holders with accumulation/distribution tracking, balance context, supply percentage.

JSON Web Token (JWT) decoder — parse an unverified compact JWS header and claims and evaluate advisory NumericDate tim

Timezone converter — resolve civil-time daylight-saving (DST) folds or gaps and convert one local time between IANA zo

Solana Program Derived Address (PDA) calculator — derive the canonical off-curve address and bump from bounded public

Keccak Merkle proof verifier — validate inclusion plus exact leaf index and count proof shape for the Atlas sorted-pai

0/1 knapsack solver — exact work-bounded capacity planning and portfolio selection for maximum value, with determinist

PyPI package health API: dependency-hygiene facts from the official PyPI JSON API — latest version, upload time, total

npm package health API: dependency-hygiene facts straight from the npm registry — latest version, all dist-tags, last-

Which proven-winner wallets are aping fresh (<6h) memecoin launches right now, and what are they buying? Vetted seed s

CVE lookup and exploit check by CVE id. Answers is this CVE actively exploited in the wild using the US CISA Known Exp

Passive HTTP security header review for an authorized external target (no exploitation; platform hosts blocked)

Returns top trader long and short positioning from Binance futures.

Token safety analysis for a Solana mint: overall risk level, wallet-network concentration, bundle detection, mintable/

Service: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/154943/photos)

One letter of Kubla Khan, ownable once, ever; price rises with each sale. The letter index goes in the path: /api/poem

Full analysis of a Solana token given its mint address — current price, liquidity, safety risk score, honeypot check,

One call composes runner-scan (on-chain velocity), smart-money-trenches (proven-winner wallet buys), and attention-mom

Adds top 20 holders, HHI concentration index, volatility metrics, slippage estimates to light token analysis.

List X accounts your wallet owns or has shared access to (returns full credentials).

Search US SEC filings by keyword: institutional holdings (13F), insider transactions (Form 4), 8-K/10-K/10-Q filings,

Search US healthcare data by keyword: CMS NPPES NPI provider records, NLM RxNorm drug concepts, ClinicalTrials.gov stu

Look up US federal court cases by case name, party, court, or citation across 1.55 million+ opinion records: SCOTUS al

A user's timeline including their replies. Example: GET /api/jack/with_replies

Place an outbound phone call from a number you own or have shared access to, with optional TTS or audio playback.

Fetch a URL and report whether it is reachable, the HTTP status code, and the response time in milliseconds. A fast li

Look up the domain's registration expiry via WHOIS and report the expiry date and days remaining. Use to catch domains

Resolve a DNS record (A by default) for the host and return the values. Use to confirm a domain resolves and to detect

Inspect the site's TLS/SSL certificate: whether it is currently valid and how many days remain until it expires. Use t

Run HTTP + SSL + DNS + domain-expiry in one call and return a combined health snapshot. The single pre-flight check to

Retrieve a prepaid card you own: full card number, CVV, expiry, balance. Owner-verified ($0.01 ownership proof).

Entity and counterparty verification by identifier or name. Resolves US healthcare providers (CMS NPI), legal entities

Sample any single record in the OSF catalog for $0.001: the full JSON payload plus a provenance URL to the authoritati

Full French company profile by SIREN: official company data from the French company registry (INSEE Sirene / INPI RNE)

Get OpenAI-compatible inference from many models at market prices via Surplus Intelligence.

Returns the realtime price for a US stock ticker like AAPL.

Provision a cheap, disposable, receive-only email inbox for receiving a one-time verification or order-confirmation em

Creates an image from scratch from a text description. Choose the quality tier with image_generator_version: hd, geniu

Wait (blocking, up to 90s) for an SMS verification code / OTP to arrive on a phone number you own, and return the pars

Access to api/v2/tokens/:address_hash/holders. List addresses holding a specific token sorted by balance

Build an unsigned swap transaction for the best route. Builds an unsigned transaction for the selected route. Compare

Access to api/v2/tokens/:address_hash. Retrieve detailed information about a specific token

Chainlink For Agents: execute a catalog workflow by workflow name.

Edge-gap reconciliation first: measures how many of a Solana wallet's real transfer counterparties are missing from an

What is the on-chain forensic profile of this Solana wallet? Single-wallet evidence dossier API for agents that need o

Who funded this Solana wallet, and where did its funds come from? Cache-first funding-lineage evidence API returns kno

Is this Solana wallet a bundler? Single-wallet bundler and private-routing evidence check. Detects whether one wallet

Search tweets, X-API-style raw shape. Body: {"q":"x402","sort":"Latest","limit":20} - the param is q, not query

Verify whether a Brazilian company is a financial institution authorized by the Central Bank of Brazil (banks, credit

Physics ODE solver (SciPy): coupled ODE systems from parameterized templates (orbital 2-body, oscillator, pendulum, he