EU Compliance & On-Chain Pre-flight

claude mcp add --transport http eucompliance https://mcp.eucompliance.tools/mcp

Claude Desktop / Cursor / any MCP client— add to the config:

{ "mcpServers": { "eucompliance": { "type": "http", "url": "https://mcp.eucompliance.tools/mcp" } } }

Nothing to sign up for. Two tools are free (VAT ID and IBAN validation, 5000/day); the rest are paid per call and an agent with a wallet settles them over x402 by itself. Ask it"validate VAT ID ATU16170006"and it works immediately.

On-chain pre-flight — for agents that transact

A failed transaction costs the full gas of the attempt. These calls cost a fraction of it.

EU compliance — for agents that onboard, invoice or pay

Market & social data — for agents that trade or monitor

Check a UBL or CII invoice (XRechnung, ZUGFeRD / Factur-X, Peppol BIS) against thecomplete official EN 16931 Schematron— the same rule set the official validators use, run unmodified — plus totals arithmetic and VAT category rules. Every finding comes back with its officialBR-code and severity, and the result is signed so it can be attached to the document as validation evidence.

pip install requests python examples/validate_einvoice.py # broken sample → BR-02, BR-06, BR-CO-26 … python examples/validate_einvoice.py my-invoice.xml # your UBL/CII XML python examples/validate_einvoice.py zugferd.pdf # or a ZUGFeRD / Factur-X PDF

Free, 5 calls a day per address, no signup:

curl "https://api.eucompliance.tools/free/vat-rules?supplier=AT&customer=DE&b2b=true&type=service" curl "https://api.eucompliance.tools/free/sanctions?name=Some%20Company%20Ltd"

Every response carries a receipt: the result hash, the issue time and an EIP-191 signature. Checking it needs no network and no trust in the issuer:

from eucompliance_verify import verify_receipt, PaymentPolicy result = verify_receipt(response_json) # recomputes the hash, recovers the signer policy = PaymentPolicy(max_age_hours=24) if not policy.check(response_json).allowed: raise RuntimeError("do not release this payment")

x402 v2, schemeexact, networkeip155:8453(Base mainnet), asset USDC. The payer needs no ETH — gas is sponsored via EIP-3009, with Coinbase CDP as facilitator. Call any endpoint without payment to receive the challenge containing the exact price and payment address.

Prefer an invoice? The operator holds an Austrian trade licence and a VAT ID and can bill normally — see the signup page.

eucompliance.tools, operated from Vienna, Austria.

Two things about the origin, because they explain why the tools are shaped the way they are:

The VAT engine was not built for a market — it was built because we issue reverse-charge invoices ourselves every week and nothing off the shelf produced the codes our accountant, and from 2026 the EU e-invoicing mandates, require. Every rule in it is one we file under. The conformance fixtures are public so you can check that claim rather than believe it.

The on-chain tooling came out of running an agent wallet and getting tired of transactions that failed for reasons the receipt did not explain. The pre-flight check is the thing we wanted to exist.

Operator: Patrick Kaufmann, sole proprietor in Vienna, Austria (trade licence, Austrian VAT ID) — which is why an ordinary invoice is an option alongside per-call USDC. On-chain identity: ERC-8004 agent#60255on Base.

MIT licensed. No telemetry, no tracking, no key required to look.

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