Auto top-up demo — not wired
Below $0.50, top up $5.00 · Visa ··4242
Agents pay per call — no account
$ curl -X POST /tool/site_status
# pay via a signed x402 authorization
# no payment? discover the terms:
$ curl -X POST /tool/site_status → HTTP 402
# over your cap? credits stop, x402 still works
→ 402 {"error": "daily spend cap reached"}