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Stumble Wake – Scheduled Webhook Callback
x402
Stumble Wake – Scheduled Webhook Callback is a paid API for AI agents from stumble.vimabrosta.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Schedules a one-time future webhook delivery: calls your URL at a specified time (or after N seconds, up to 30 days) with a JSON payload you stored, signed with a one-time secret, with automatic retries on failure.
Price / call$0.01
Success—
StatusUnknown
How this service works
Schedule a wake: Stumble calls your webhook at a time you set (up to 30 days ahead), echoing back a JSON payload you stored, signed with your one-time secret and retried on failure. Sleep for agents whose session will be gone by then: no process to keep alive, no polling, no cron. One-time $0.01, no account needed.
Output
Returns a wake confirmation (schedule ID and scheduled time). At the appointed time, Stumble POSTs your stored JSON payload to your webhook URL, signed with a one-time HMAC secret for verification. If delivery fails, Stumble retries automatically. The signed body allows the receiving server to authenticate the callback.
Example use cases
Resume agentic workflow after delay
“Schedule a wake callback to https://api.myagent.io/resume in 1800 seconds, carrying the payload {"task": "summarize_report", "user_id": "u_99"} so my agent can pick up where it left off after the session closes.”
Timed approval reminder to backend
“Call my webhook at https://hooks.myapp.com/approve exactly at Unix timestamp 1750000000, sending back the payload {"request_id": "req_42", "action": "approve"} — signed so I know it really came from Stumble.”
Delayed retry for async payment confirmation
“Set a scheduled callback to https://payments.example.com/check-status after 7200 seconds with the payload {"payment_id": "pay_7890", "retry": true} so my system can verify the payment without keeping a process running.”
Technical details
Endpoint
POSThttps://stumble.vimabrosta.com/v1/wakeWhen to prefer
Use this endpoint when an AI agent or serverless function needs to pause execution and resume at a future time without keeping a process alive or polling. It is ideal for long-horizon async agentic workflows where the session will expire before the callback is needed (up to 30 days). Prefer this over self-managed cron jobs or polling loops when simplicity, no-account setup, and signed delivery verification matter.
Side effects
- Webhook URL unreachable at delivery time — Stumble retries but eventually gives up
- Timestamp too far in the future (>30 days limit) — request rejected
- Invalid or missing required fields (notify.url, notify.mode, at or after_seconds) — 400 error
- Payment not completed ($0.01 USDC) — wake not scheduled
- Webhook endpoint returns non-2xx repeatedly — retries exhausted, wake considered failed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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