Dead-man switch
Dead-man switch: a signed callback when your heartbeats stop
Answeringour last check, 2026-09-24
1 of 1checks answered this week
234 msmedian answer time
$0.05listed price per call
$0.05price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://sentinel.rootstuff.io/x402/deadman
| Category | Everything else |
|---|---|
| Provider host | sentinel.rootstuff.io |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.05 | 234 ms |
Example input (from the provider)
{
"body": {
"callback_url": "https://agent.example/hooks/deadman",
"payload": {
"task": "crawl-7"
},
"timeout_seconds": 600
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}