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agent-exec Deadman Switch Registration
x402
agent-exec Deadman Switch Registration is a paid API for AI agents from agent-exec.448c.net, paid per call via x402, $0.0054/call, status unknown (last checked 2026-10-10).
Registers a pay-per-use deadman switch: if the agent fails to confirm before the lease expires, a probe URL is automatically checked to verify liveness or task completion.
Price / call$0.0054
Success—
StatusUnknown
How this service works
Accountless, pay-per-use code execution for software agents: submit source code, get stdout, stderr and exit code back from an isolated, network-less sandbox. No account, no API key -- possession of valid payment is sufficient.
Output
Returns a JSON object with a UUID entry ID (needed for later confirmation), status always set to 'pending', the probe object including URL and predicates, Unix-ms timestamps for creation and lease expiry, and payment details including wallet address, amount charged, asset, network, and transaction hash.
Example use cases
Agent liveness heartbeat check
“Set up a deadman switch with description 'Agent heartbeat for job #42' — if I don't confirm in 60 seconds, probe https://jobs.myapp.io/42/status and verify it returns status 200 and body contains 'running'.”
Task completion verification
“Register a watchdog for my report generation task — describe it as 'Verify nightly report was generated', give it a 300-second lease, and if I don't confirm, probe https://reports.internal/nightly and check the response contains 'report_complete'.”
Deployment rollout guard
“Create a deadman switch called 'Production deploy guard' with a 90-second lease — if I don't manually confirm the deploy succeeded, automatically probe https://app.prod.example.com/healthz and expect HTTP 200 back.”
Technical details
Endpoint
POSThttps://agent-exec.448c.net/deadman?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need an accountless, pay-per-use watchdog mechanism for an AI agent or automated pipeline — especially when you want a remote third party to verify liveness or task completion via HTTP probe if the agent goes silent. Prefer this over polling or cron-based monitors when you need cryptographic payment as the sole authentication mechanism and want zero account management overhead.
Side effects
- Probe object missing both expectedBodyContains and expectedStatus — entry cannot ever resolve to confirmed or refuted
- leaseSeconds not provided or invalid — request rejected
- Payment insufficient or invalid x402 credentials — 402 response with no entry created
- URL in probe is unreachable from the service's vantage point — probe may time out and leave entry unresolved
- Agent fails to confirm before lease expires — probe fires automatically and owns the verdict
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| proberequired | object | At least one of expectedBodyContains / expectedStatus is required -- a probe with no predicate can never resolve to confirmed or refuted. |
| descriptionrequired | string | What you are about to do. |
| leaseSecondsrequired | number | How long before an unconfirmed entry's probe runs. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| idrequired | string | Keep this -- it is both how you confirm and how anyone reads the eventual verdict back. |
| proberequired | object | At least one of expectedBodyContains / expectedStatus is required -- a probe with no predicate can never resolve to confirmed or refuted. |
| statusrequired | string | Always pending at registration. |
| paymentrequired | object | |
| createdAtrequired | integer | Unix ms this entry was registered. |
| descriptionrequired | string | |
| leaseExpiresAtrequired | integer | Unix ms the lease expires -- confirm before this or the probe owns the entry. |
Tags
x402
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