Search scholarly literature via OpenAlex: works with metadata and abstracts. POST /v1/literature with a {query} and optional limit and get matching works as one JSON object. Deterministic per index vintage. Pay per request in USDC; no account, no API key.

Stock quote API for AI agents — get a live/latest US equity price and volume reading for one ticker from the first available real provider.

Current gas price and latest block for Base or Ethereum mainnet, straight from public RPC. Fresh within 15 seconds. JSON response. $0.002 USDC per call, pay via x402, no API key.

Environment Contract

A Hyperliquid account's fee schedule and trailing volume, for any 0x address.

The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Auction sale history, newest first. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.

The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Epoch history and boundaries. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.

WHOIS domain lookup — raw registry text with registrar, nameservers, lifecycle dates and status, plus the responding server. Use the RDAP endpoint when you need parsed structured data.

Current and historical funding rate for one perpetual futures market, from a live derivatives venue: hourly rate, the 8-hour and annualized equivalents, the mark-vs-oracle premium, and a window of past prints with average, minimum, maximum and the share that were positive. Use it when an agent needs to know what holding a leveraged position costs right now, or wants to detect a funding regime flip before sizing a trade.

URL safety verdict: follows the redirect chain, detects homograph and punycode hostname tricks, and cross-references the destination host against the URLhaus threat feed. Returns safe, suspicious or malicious with reasons. Single-URL scope; domain-wide grading is /sitegrade and registration facts are /domain-intel.

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

Give this API up to 10 domain names and it tells you whether each has a registration record at the official registry. It uses RDAP, the structured replacement for WHOIS, so there is no free-text parsing. Each domain comes back as 'registered', 'unregistered', or 'indeterminate' when the registry has no RDAP for that ending. 'Unregistered' means no record was found, which usually means available - but reserved and premium names also return no record. Registration status only; no pricing.

Census of the x402 ecosystem from our daily Bazaar snapshots: which domains launched or disappeared since yesterday, price-median drift, and network mix. ?kind=new|gone for the machine-actionable churn roster, or full pulse with aggregate + timeline. Only a holder of past snapshots can compute churn — objective counts, no quality judgment, machine-readable.

Inspect and lint any x402 paid endpoint: decodes the 402 payment challenge, names the network and asset, and flags misconfigurations including missing Bazaar discovery metadata.

Currency exchange rate for converting between any two currencies (forex/FX rate), drawn from a set of 30+ major currencies, sourced from the European Central Bank's official daily reference rates. Updates once per business day (~16:00 CET) — not a live or intraday feed.

Active National Weather Service watches, warnings and advisories for a US coordinate or a two-letter state or marine area code - event, severity, certainty, urgency, headline, affected areas and zone codes, and effective/onset/expiry times in UTC. Read at request time, so an empty list means nothing is active. The 5 newest come back by default; detail=full adds the NWS narrative. Use when: Decide whether an active US weather warning affects a location before dispatching or travelling.

Smart contract security check before you approve or pay an address: reads the bytecode, behind proxies too, for privileged functions (mint, pause, blacklist, upgrade), dangerous opcodes and protocol type, and checks whether a single key holds those powers. Adds OFAC SDN screening, who funded the address, sybil-filtered ERC-8004 reputation for agents and a 0-100 score with proceed / hold / block. Static analysis, not an audit. Free: GET /v1/verify. Trial: /v1/trial.

Cyre Escrow Brief — before agents release escrow, grade both payTo sides (Base or Solana) + amount hygiene. Not custody. Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md

Cyre Program Brief — novelty and age patterns for a Solana program id, with optional wallet context before first touch. Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md

Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs are accepted and automatically stripped down to the bare domain. Duplicate domains are quietly removed before processing. Results come back as one flat row per domain, ready to drop into a spreadsheet, database, or pipeline.