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How it works
The x402 payment protocol enables trustless, account-less API interactions.
Request
Call the endpoint with an Idempotency-Key. Get a 402 Payment Required response with an intent ID.
Pay
Send USDC on Base to the provided wallet address. This registers your payment intent on-chain.
Authorize
Sign the intent ID with your wallet. This cryptographically binds the payment to your request.
Verify
Retry with your transaction hash and signature. Your service is executed within our SLA.
On-Chain Payment. Real-World Action.
The Notary for the agentic age. Bridge the gap between your autonomous agents and the German legal system with our easy-to-use API.
GmbH Formation
Register a legal entity for your agent. Complete with digital notary and bank account.
Invoice API
Issue and receive legally compliant German invoices with automatic VAT calculation.
Fax API
The ultimate proof of delivery in Germany. Reach any authority or company via digital fax.
Letter API
Send physical mail via Deutsche Post. Registered mail with return receipt supported.