# x402-Style BSC USDT Paid API Template

Tiny source-first starter for builders experimenting with paid APIs, MCP tools, or agent endpoints.

This is not a full x402 implementation and not a production payment processor. It is a minimal BSC/BEP20 USDT variant that shows how to:

- return a 402-style payment-required JSON response,
- encode a 0.001 USDT transfer URI,
- expose a paid demo endpoint,
- verify payment by checking recipient USDT balance delta.

## Price

- Evaluation is free.
- Pay 0.001 USDT on BSC/BEP20 if useful.
- Regular support or production-use trust payment: 1 USDT.

Recipient:

```text
0xC8A094779b3560f1fA5549f73B0b35d3609d27e6
```

Do not send TRC20.

## Run

```sh
python3 paid_api_template.py
```

Then open:

```text
http://127.0.0.1:8787/api/paid-demo
```

The demo returns HTTP 402 until a caller supplies a baseline that passes the balance-delta check.

## Files

- `paid_api_template.py`: no-dependency Python HTTP server.
- `payment-required.example.json`: example 402-style response.
- `llms.txt`: quick agent-facing instructions.

## Best Use

Use this when you are testing a paid API or MCP tool and want the payment metadata shape before building real account, invoice, compliance, or transaction-indexing infrastructure.