Server quickstart

Run the bundled gateway demo to test the server side of pay without writing a provider spec first.

Agent summary

• Use top-level --sandbox; pay server demo requires it.
• The demo writes pay-demo.yaml in the current directory.
• Open the debugger only for inspection; do not invent transaction details that are not shown.

Start the demo

pay --sandbox server demo

Call a metered endpoint from another terminal:

pay --sandbox curl http://127.0.0.1:1402/api/v1/reports/usage

The debugger UI is served on the gateway port and shows the challenge, payment proof, retry, and final response.