{"slug":"sentinel-rootstuff-io-x402-deadman-9f4994","title":"Dead-man switch","host":"sentinel.rootstuff.io","method":"POST","resource":"https://sentinel.rootstuff.io/x402/deadman","category":"other","description":"Dead-man switch: a signed callback when your heartbeats stop","price_listed":0.05,"price_asked":0.05,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":234,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"callback_url":"https://agent.example/hooks/deadman","payload":{"task":"crawl-7"},"timeout_seconds":600},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"callback_url":{"description":"Public https URL that receives the POST. Private and reserved addresses are refused; redirects are not followed.","type":"string"},"payload":{"description":"Up to 4 KB of JSON echoed back in the callback.","type":"object"},"timeout_seconds":{"description":"Longest silence allowed between heartbeats, 60 to 86400.","type":"integer"}},"required":["callback_url","timeout_seconds"]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.05,"price_match":true,"latency_ms":234,"error":null}],"description_full":"Dead-man switch: a signed callback when your heartbeats stop","last_updated":"2026-09-10T16:07:55.834Z","schemes":["exact"]}