Xynaptic Factoring Debtor Risk — pre-advance credit assessment of an invoice debtor (French company): registry status, financial strength, payment-risk verdict (advance/caution/refuse) and recommended max exposure. Informational, not financial advice. GET ?siren=... or ?name=...

X1 chain: live XNT/USD price from the on-chain USDC.X/XNT pool, with the 1h and 24h change. A change is null when our price history does not reach back that far (historyMinutes says how far it does), never a shorter window under the longer name.

Basename lookup: name.base.eth to address, or an address to its verified primary name, with profile records. Base name lookup: a Basename (name.base.eth) to its address, owner and public profile records (avatar, url, X, GitHub), or an address to its primary Basename, forward-verified so a spoofed reverse record is never trusted. Read on Base from the Basenames registry. Paid in USDC on Base.

Email verification: is one address deliverable, disposable or a role account? Check ONE email address before you send to it: pass ?email=name@domain.com and get a verdict (deliverable-domain, role-account, disposable, bad-shape or no-mail-domain) from its shape, its MX records read live over DNS, 25 known disposable-mail domains and 27 role-account names like info, support and admin. The mailbox itself is not probed, and the answer says so. Paid in USDC on Base.

Dusting Attack Monitor analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.

Phishing domain check: domain age, registrar, DNS, TLS certificate and brand lookalikes. Is this link safe to send a user to? Pass ?domain= (or a URL). From public records: when it was registered and by which registrar (RDAP, the registry's own record), its DNS, who issued its TLS certificate and until when, and whether the name imitates one of 40 brands phishing kits copy (coinbase, metamask, uniswap...). A record we could not read is reported as unread, never as clean. Paid in USDC on Base.

Official UK company registry (Companies House). Two modes: pass query to search companies by name (returns company number, name, status, type, incorporation date, address), or pass companyNumber for the full registry profile — legal name, status, company type, jurisdiction, incorporation/cessation dates, SIC activity codes, registered office address, accounts (next due, last made-up-to), confirmation-statement due date, charges and insolvency flags, previous names, and the officers list (name, role, appointed/resigned dates, nationality, occupation). Free, Open Government Licence (commercial use permitted). The authoritative UK-company KYB lookup — complements business.lei (GLEIF) and business.br-cnpj (Brazil).

Address Poisoning Detector analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.

Arc token trade history, 24 h: buys and sells, distinct buyers and sellers, latest 30 trades, and each v4 pool's swaps with USDC in and out. Trade history and net flow for an Arc token, last 24 h: buys and sells, distinct buyers and sellers, % of supply bought and sold per 1 h / 6 h / 24 h, the latest 30 trades with block and transaction, and for its known Uniswap v4 pools the exact swap count with USDC in and out (net USDC flow). Pass ?token=0x....

Xynaptic Flight Asia Brief — aviation panorama of any Asian (or world) country: major airports with IATA codes and coordinates, local airlines with hubs. Open data (Wikidata). GET ?country=Indonesia.

Stablecoin peg deviation and depth, per issuer.

Arc pre-trade risk in microseconds, no chain call: pass ?hook=0x… and get the verdict read straight out of the Uniswap v4 permission bits encoded in the hook address. It tells you what the hook is ALLOWED to do (run on every swap, rewrite the amounts, touch liquidity), not what it does: permission is not behaviour. No trap rate is quoted - the 83.7% we used to state came from a pre-buy sell quote and was withdrawn on 2026-09-22 after a real round trip sold 10 of 10 pools with that signature.

Did that Arc payment actually land? Pass ?tx=0x… and optionally ?to=0x… and ?expect=1.50 to get the payer, the amount, whether it reached your address, confirmations, finality and the gas paid — all in USDC. Handles the thing that breaks most Arc integrations: USDC is the NATIVE gas token at 18 decimals in tx.value AND has a 6-decimal ERC-20 view, so a verifier that only reads Transfer logs reports real payments as zero. Read-only: checking never consumes the payment.

Bytecode Clone Provenance analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.

Every agent registered on Arc (ERC-8004 identity registry) with its agentId, owner and registration file — the full directory of who is operating on Arc, read from the chain. The free endpoint returns only the count and the first few.

What a transaction on Arc ACTUALLY costs, measured from real receipts rather than quoted from the docs. The companion to /api/x402/arc-cost, which prices a named operation at the current gas price: that one is the quote, this one is the measurement and the tail. The most repeated claim about Arc is that USDC-as-gas means predictable low fees. The low half is true; the predictable half does not survive measurement, and that is what you are buying.

X1 chain health: epoch, slot, TPS, validator count + delinquency, total/activated stake, supply. Sources api.x1.xyz cluster.

Drug safety card: FDA label warnings, adverse-event counts, recalls, molecule and harm-reduction facts, each with its licence. Drug safety card from open sources in one call: pass ?name=ibuprofen (brand or generic) or a substance such as MDMA. RxNorm normalises the name to its ingredients; then the FDA label warnings (boxed warning, contraindications, interactions), FDA adverse-event report counts with the top reactions, recent FDA recalls, molecule facts (ChEMBL) and harm-reduction dose…

Bazaar SEO for x402 sellers: where your endpoint ranks in Coinbase Bazaar search and what to fix. Where does your x402 endpoint come up when an agent searches Coinbase's Bazaar? Pass ?url= and optionally &query= (up to 3; left out, your own tags are searched). For each search: your rank in the top 20, the sellers above you with their price, tags and 30-day payers, the median price, and the concrete fixes (serviceName, tags, the words your description opens with).

PDF to text: extract the text of any public PDF, page by page. The text of a public PDF, page by page: pass ?url= of a whitepaper, filing, invoice or paper and get every page's text with page markers, the page count and the file size. Parsed with pdf.js; up to 15 MB and 200 pages. A file that is not a PDF, will not open, or has no text layer (scanned images) is refused before any charge.