An x402 payment is a USDC transfer to an address, nothing more. 402lounge reads every payment your agents make, names the seller, says what was bought and what it cost in euros, and turns each month into one document per seller.
What your accountant gets from a wallet export today, and what they get from 402lounge.
2026-10-31 02:41 0x4b7e…1e07 → 0x6e2d…c71b 0.150000 2026-10-31 02:38 0x4b7e…1e07 → 0x9c47…7d15 0.010000 2026-10-31 02:09 0x4b7e…1e07 → 0x2b91…b904 0.050000
Your agent Research pulls funding rounds from Northpine Data for 0.15 USDC. Here is everything that happens to that payment.
Research pays Northpine Data 0.15 USDC, straight from its own wallet to Northpine's. No card, no account, no invoice. We are not in between, and we never hold a key.
We read the transfer from Base and look up the address in the register: it belongs to Northpine Data. Their catalogue says what the call was. The receipt is in your dashboard before anyone asks for it.
Every payment to Northpine Data in October becomes one numbered document: a line per call type, with count, total and euro value. With Books it also carries the tax case your accountant needs.
Two booking lines per document, because paying in USDC is an exchange, not a bank transfer. As CSV or a DATEV file, with account suggestions your accountant can keep or change.
Agents, wallets and people all belong to the company. Everyone sees the same receipts, from the same data.
Each agent joins with its own wallet and one signature. People join by email, with a role: owner, finance or viewer. Your accountant can get a login too.
Agents pay sellers directly. We hold no keys and no balances, and we read the chain only after the fact.
A payment to an address nobody claims still gets a receipt. Name it yourself, and we invite the seller to the register.
Agents read their receipts over MCP, your own tools over the REST API. Same data, same answers as the dashboard.
receipts.list MCP, for your agents GET /v1/receipts REST, for your systems
Start with one agent today. Move to Books when your accountant wants the export.
Something else on your mind? A person answers, usually the same day.
No. Each agent proves its wallet once with a signature. After that we only read public data from Base. We never hold funds and never sign anything for you.
No. They keep paying the sellers they choose, from the wallets they have. Adding 402lounge is one line in the agent's MCP client, and from then on it can report what it bought.
The payment still gets a receipt, marked as an unknown seller, so nothing goes missing. You can name the wallet yourself, and we ask the seller to register.
With the ECB reference rate of the payment day. Your tax adviser confirms the method once. Other methods come as options.
Base. Sellers list wallets on other networks too, and we show them, but receipts and documents cover payments on Base.
No, and we do not give tax advice. We write the documents and the booking lines. What goes where stays with you and your accountant.
Set up your company for free, connect an agent, and watch its next payment come back as a receipt.