Livecheck Sentinel check - one-shot URL condition check. POST /v1/check with {target, condition, baseline_hash?}. Detectors: status_change, keyword, text_diff, numeric_threshold. Returns current observation + fired when comparable. Fixed $0.02 USDC. No watcher created. Not /v1/verify ($0.01) and not Confirm.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.02 USDC | 0x3369...91c5 |