Chat Completion (basic)

LLM completion per call, no account and no API key: POST a prompt (or a messages array) and get the model answer as JSON. Hard caps disclosed in every response (6,000 UTF-8 bytes in, 750 tokens out on this tier). Fixed price per call, signed receipt included so the answer stays auditable. Larger tier at /x402/chat-plus.

Per-coin positioning brief: at-least-two-exchange spot median (attempting Binance/Coinbase/Kraken), Hyperliquid funding, open interest, premium and volume. The disclosed 0-100 crowded-long/short score uses funding and premium; the 6-hourly archive trend is separate context and may still be filling. One call per coin. Signed, verifiable receipt included.

LLM completion per call on a stronger model, no account needed: POST a prompt or messages array, get the answer as JSON. 6,000 UTF-8 bytes in, 1,200 tokens out, fixed price per call, hard caps disclosed in every response, signed receipt included. Smaller and cheaper tier at /x402/chat.

Counterparty due diligence in one call: validates the EU VAT ID against the live VIES register, screens the company or person against the official EU consolidated sanctions list, checks the IBAN, and returns a traffic-light verdict (clear / review / blocked) with reasons and a recommendation. Built for onboarding a new supplier, customer or payee automatically. Every finding cites its official sou

EU VAT decision engine for invoicing and e-invoicing: determines place of supply, reverse charge, intra-Community supply, export or domestic VAT, returns the rate and the EN 16931 / UNCL5305 VAT category code (BT-151) plus exemption reason code (BT-121) and ready-to-use invoice wording (EN/DE) with the legal article reference. For XRechnung, ZUGFeRD, Peppol BIS and OSS workflows.

LLM completion per call, no account and no API key: POST a prompt (or a messages array) and get the model answer as JSON. Hard caps disclosed in every response (8k chars in, 1k tokens out on this tier). Fixed price per call, signed receipt included so the answer stays auditable. Larger tier at /x402/chat-plus.

Web page reader for agents: pass a URL, get the readable content back as clean markdown or plain text - title, author, date, main text, tables, links. Direct fetch of the public page, no third-party index in between. 3 MB / 20 s caps, internal addresses refused. Fixed price per fetch, signed receipt included.

Will this transaction go through? Six checks before any gas is spent: gas vs balance, full simulation with the revert reason decoded, stuck nonces, contract or wallet recipient, ERC-20 allowance, and a sanctions screen of the counterparty. Returns send / do not send with every reason.

What happened to my transaction? Status, block, gas used, fee paid - and if it failed, the revert reason in plain text, recovered by replaying the call against its block. The receipt alone does not carry that reason.

Computed crypto-market indicators, not a data relay. We buy raw feeds from several upstream x402 providers and compute our own market-regime reading. The scoring rule is disclosed in every response, so the result is reproducible. Products: market_brief, yield, gas. (Soft commodities are a separate, pricier feed at /x402/commodities.)

Sanctions screening (AML/KYC) against three official lists in one call: EU (Commission FSF), UN Security Council and UK (HM Treasury OFSI) - 12,000+ entities, 50,000+ name variants, re-indexed daily, fuzzy matching. Each hit states its list, programme, reference and the list date. Optional lists=eu,un,uk.

Pre-flight check before a swap or transfer: ERC-20 allowance, balance, decimals and symbol in one call, read live from the chain at the latest block. Pass an amount and get a straight would_succeed verdict with the blocking reason and the action needed. Base, Ethereum, Arbitrum, Optimism, Polygon. A missing approval burns the gas of a failed transaction - this call costs a fraction of that.

Soft-commodity supply-stress indicator: we buy Brazilian growing-belt crop-weather stress plus Ivory Coast cocoa and coffee farmgate prices from several upstream x402 providers and compute one supply-stress score. One call instead of finding, paying and merging three feeds yourself. The scoring rule is disclosed in every response.

Historical time series that no upstream provider sells. They sell the current value; we archive every value we buy, so the series over days and weeks becomes ours alone - it cannot be copied because a competitor lacks the past. Products: gas (Base gas price, Gwei), yield, commodities, market_brief. The scoring rule and point count are disclosed in every response; a short series says so honestly.

Bookkeeping statement for an AI agent's own spending: reads every USDC payment of a wallet from Base, converts each to EUR at the ECB rate of the payment date, groups by payee, adds the VAT treatment (reverse charge, Art. 44/196) and returns a bookkeeping-ready statement plus CSV export. Agent micro-payments become auditable.

LLM completion per call on a stronger model, no account needed: POST a prompt or messages array, get the answer as JSON. 16k chars in, 2k tokens out, fixed price per call, hard caps disclosed in every response, signed receipt included. Smaller and cheaper tier at /x402/chat.

JSON-RPC for five chains through one endpoint, no account and no API key: Base, Ethereum, Arbitrum, Optimism, Polygon. Two things a bare node does not give you. Failover: several public nodes per chain are tried in order, and the answer names the one that served it, so a throttled node costs you a retry rather than a failure. Decoded reverts: a failed eth_call returns 'execution reverted' and noth

E-invoice validator for EN 16931, XRechnung, ZUGFeRD, Factur-X and Peppol BIS: upload the XML or a ZUGFeRD PDF and the COMPLETE official EN 16931 Schematron rule set is applied (CEN validation artefacts 1.3.16, unmodified) plus totals arithmetic and VAT category checks. Every finding carries its official BR- rule code and severity; the result is signed and independently verifiable.

AI Act Article 50 disclosure - the privacy-first GET path: pass only the SHA-256 of your AI output (content_sha256), never the text itself. Get back the signed provenance record, the human-readable disclosure in DE and EN, and the obligations that apply to the deployer. Your content never leaves your system. Use POST with 'content' if you want us to hash it for you.

Search recent public posts across OPEN social networks - Bluesky, Hacker News and Mastodon - in one call: author, text, time, engagement, link. Failing sources are named in the answer, never silently dropped. Twitter/X and TikTok are deliberately out of scope: their terms forbid scraping. Query: q, limit. $0.002 per call, signed receipt included.

Perpetual futures market data from the Hyperliquid public API: mark and oracle price, hourly and annualised funding rate, open interest, 24h volume and max leverage per market, sorted by volume. Query: coin (optional, e.g. BTC) or top=N. Source and timestamp in every answer, 10 s cache. $0.005 per call, signed receipt included.

Company register lookup from the official national registers: France (Annuaire des Entreprises), Norway (Brønnøysund), Czechia (ARES), Finland (PRH), Slovakia (RPO), Poland (KRS). Name, registration number, status, legal form, address and registration date, normalised. Search by name or registration number.

Crypto spot price as the median of three independent public exchange tickers (Binance, Coinbase, Kraken). Every single quote, the spread and the timestamp are disclosed, so the median can be recomputed by the buyer. Refuses to answer from fewer than two live sources. Query: symbol (BTC, ETH, SOL, ...). $0.001 per call, signed receipt included.