# 402lounge

> Receipts, monthly vouchers and a register for AI agents that pay with x402, in USDC on Base. 402lounge reads the chain and writes the paperwork. It never holds keys or money and is never in the payment.

An agent does everything itself over MCP. It signs up with its wallet, which makes its account a company, reports every x402 payment with receipts.record and gets a receipt with the seller, what it bought and a EUR value. register.lookup says who is behind a payTo address before it pays. Tools that only read work without an account. Call lounge.requirements first.

## Start

- [MCP server](https://mcp.402lounge.com/mcp): Streamable HTTP, no key to connect, 57 tools, all free to call
- [Quickstart](https://402lounge.com/docs/quickstart.md): Connect your agent, let it sign up with its wallet and turn its next x402 payment into a receipt
- [skill.md](https://api.402lounge.com/skill.md): sign-up and the first receipt as a skill file
- [Requirements](https://api.402lounge.com/v1/requirements): the current terms versions and the sentence your wallet signs, as JSON
- [REST API](https://402lounge.com/docs/api.md): the same functions under https://api.402lounge.com/v1

## Docs

- [Overview](https://402lounge.com/docs/overview.md): How 402lounge fits around an x402 payment, and where to start if you run an agent, keep the books or sell a service
- [Wallets](https://402lounge.com/docs/wallets.md): Which wallets work, how a wallet proves it is yours, and how a company holds several of them
- [Accounts and sign-in](https://402lounge.com/docs/accounts.md): Sign-up with a wallet signature, the ways to prove who you are, session tokens, people in the app, the terms you accept, how an agent leaves and how a company closes
- [Receipts](https://402lounge.com/docs/receipts.md): One receipt for every outgoing USDC transfer of a company wallet, with the seller, what was bought, the agent that paid and a EUR value
- [The register](https://402lounge.com/docs/register.md): Wallet in, seller out. Who owns a payTo address, on which level, and what the service sells
- [Companies, agents and people](https://402lounge.com/docs/companies.md): Every account is a company. How it gets its legal data, more agents and the people who read the books
- [Monthly documents](https://402lounge.com/docs/vouchers.md): One document per seller and month for every company with its data in. The overview on Free, the voucher with the tax note on Books. Numbered, chained and never changed
- [Paying 402lounge](https://402lounge.com/docs/billing.md): Three ways to pay for a plan, the archive, the sponsored place or the seller check. Polar with a card, your agent in USDC over x402, or your own transfer in USDC. What the invoice says
- [For sellers](https://402lounge.com/docs/sellers.md): How an x402 service gets into the register, what we read from its 402 answer every night, and how it climbs the levels
- [MCP tools](https://402lounge.com/docs/tools.md): Every tool of the MCP server with what it does, who may call it and its inputs, as tools/list returns them
- [Errors and limits](https://402lounge.com/docs/errors.md): One error shape for MCP and REST, every code the API answers with, and the limits on how often you may call

## Pages

- [Directory](https://402lounge.com/directory): x402 services with the company behind them and the wallets they get paid to
- [Register](https://402lounge.com/register): look up who is behind a payTo wallet
- [Levels](https://402lounge.com/levels): what levels 0 to 3 mean for receipts and invoices
- [Pricing](https://402lounge.com/pricing): plans for companies, sellers and agents
- [For companies](https://402lounge.com/companies): how agent payments become documents a company can book
- [Docs](https://402lounge.com/docs): these docs for people, with search
- [MCP server page](https://402lounge.com/mcp): the setup for each client and the tool list
- [Changelog](https://402lounge.com/changelog): what changed, with dates

## Legal

- [Terms](https://402lounge.com/terms): what an agent accepts at sign-up
- [Privacy](https://402lounge.com/privacy): what we keep, why and for how long
- [Imprint](https://402lounge.com/imprint): who runs 402lounge

## Optional

- [llms-full.txt](https://402lounge.com/llms-full.txt): every docs page and every tool in one file
- [x402 discovery](https://api.402lounge.com/.well-known/x402): the free routes and the routes that take a 0.001 USDC proof
- [API host instructions](https://api.402lounge.com/llms.txt): the short version the API serves itself