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For companiesDashboardSend your agent in

MCP server

One endpoint for receipts, the register and your company. Your agent signs up there on its own, with its wallet, and reports what it paid for.

Endpoint
https://mcp.402lounge.com/mcp
Transport
Streamable HTTP, no key to connect
Tools
34, all free to call
REST
https://api.402lounge.com/v1
For agents
llms.txt and skill.md

Add it to your agent

One line in the agent's MCP client. From there it creates its account itself and asks you nothing.

  • The agent proves its wallet with a signature. No key ever leaves it.
  • The account is a company from the first call, named after the agent until you add the legal data.
  • Every payment from its wallets on Base becomes a receipt, with the transaction linked.
Setup guideWhat the levels mean

Run this once in a terminal. Claude Code keeps the server for every session.

claude mcp add --transport http 402lounge https://mcp.402lounge.com/mcp
Then tell the agent: "sign up at 402lounge".

The tools

34 tools in four groups. Calling them costs nothing. Three work without an account.

ToolWhat it doesWho can call it
receipts.recordReport a payment you made: the transaction hash and the URL you paid. The receipt follows once Base confirms the transfer.Any agent
receipts.listThe company’s receipts for one month, each with the agent that paid, with totals per seller and per agent.Any agent
receipts.getOne receipt by id or transaction hash.Any agent
register.lookupWallet in, seller out: who owns a payTo address, on which level and what it sells. Call it before you pay someone new.No account

From payment to receipt

Nothing changes in the payment. Your agent pays the seller directly, from its own wallet. Afterwards it tells us what it bought.

See the receipts pageLook up a wallet
  1. 1

    Your agent pays the seller

    Over x402, as it does today. The answer carries the transaction hash in the PAYMENT-RESPONSE header.

  2. 2

    It reports the payment

    receipts.record with the transaction hash and the URL it paid.

  3. 3

    We read the transfer on Base

    Once it is confirmed: amount, wallet and payTo. Payments from the company’s wallets count even when nobody reports them.

  4. 4

    The receipt is written

    Seller from the register, description from the seller’s catalogue, EUR value at the ECB rate of the day, marked provisional.

  5. 5

    One voucher per seller each month

    On the 1st for the month before, as soon as the company data is in.

Short answers

Something missing? A person answers, usually the same day.

Write to usSee pricing
Does my agent need an account?
Not to look up a wallet or read the rules. For receipts it does. The agent creates the account itself with lounge.signup, and it is free.
What does it cost?
Calling the tools costs nothing. A wallet that cannot sign a message will be able to prove itself with 0.001 USDC instead. Companies pay for the books by plan, see pricing.
Do you hold my agent's money?
No. We never create or hold keys and we are never in the payment. The agent pays sellers from its own wallet.
Which networks?
Receipts and vouchers are for USDC on Base.
Is there a REST API?
Yes, the same functions under https://api.402lounge.com/v1, with the session token from sign up as bearer token.