# ISHOB Scheduled Webhook Alarm

> ISHOB Scheduled Webhook Alarm is a paid API for AI agents from api.ishob.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-14).

Schedules a signed webhook that POSTs a JSON payload to a callback URL at a specified future time, with automatic retries on failure

## Facts

- Endpoint: POST https://api.ishob.com/v1/alarm?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ishob-scheduled-webhook-alarm-a47fdf8e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3IytyyQJVNyJeBu_2VNJK

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ishob-scheduled-webhook-alarm-a47fdf8e -d '<json body>'
```

Example prompt: Schedule a webhook alarm to POST this JSON payload to https://myapp.example.com/wake with a 300-second delay and 3 retries if delivery fails.

## When to prefer this

Choose this endpoint when an AI agent or automation needs to defer execution or re-trigger itself after a specific delay or at a precise future time, especially when reliable signed delivery and automatic retry logic are required. Ideal for agentic workflows where the agent must sleep, for scheduling reminders, or for orchestrating multi-step pipelines with time gaps — without running your own cron infrastructure.

## Known failure modes

- callback_url is not a valid public HTTPS URL — request rejected
- deliver_at and delay_seconds both omitted or both provided — ambiguous scheduling
- delay_seconds outside 60–2592000 range — validation error
- payload exceeds 8192 bytes — rejected
- All retries exhausted if callback endpoint returns non-2xx repeatedly
- Invalid ISO-8601 or Unix timestamp in deliver_at — parse error

## How this service works

Schedule a signed webhook to wake an AI agent later: ISHOB POSTs your JSON payload to your https callback at deliver_at or after delay_seconds (60 s to 30 days ahead), retrying failed deliveries (1, 5, 15, 30, 60 min). Each delivery carries X-ISHOB-Signature (HMAC-SHA256 with the signing_secret returned once). Free status: GET /v1/alarm/{id}; free cancel: POST /v1/alarm/{id}/cancel. Charged only when the alarm is accepted.

## Output

Returns a JSON object with alarm_id (unique identifier), status ('scheduled'), scheduled_for (ISO-8601 timestamp of planned delivery), status_url (path to check alarm status for free), and signing_secret (HMAC-SHA256 secret for verifying incoming webhook authenticity — shown only once).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "payload": {
   "type": "object",
   "description": "JSON object sent back on delivery (max 8192 bytes)"
  },
  "deliver_at": {
   "type": "string",
   "maxLength": 40,
   "description": "Or an absolute time: ISO-8601 with timezone (2026-10-15T14:00:00Z) or Unix seconds; 60 s to 30 days ahead"
  },
  "retry_count": {
   "type": "integer",
   "default": 3,
   "maximum": 5,
   "minimum": 0,
   "description": "Retries after a failed delivery"
  },
  "callback_url": {
   "type": "string",
   "format": "uri",
   "maxLength": 2048,
   "description": "Public https URL that receives the POST"
  },
  "delay_seconds": {
   "type": "integer",
   "maximum": 2592000,
   "minimum": 60,
   "description": "Deliver this many seconds from now (60 to 2592000). Use this or deliver_at"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "scheduled",
  "success": true,
  "alarm_id": "alarm_8f92a0d1c3b54e6f9a7d2c1b0e4f5a6b",
  "status_url": "/v1/alarm/alarm_8f92a0d1c3b54e6f9a7d2c1b0e4f5a6b",
  "scheduled_for": "2026-10-15T14:00:00Z",
  "signing_secret": "whsec_..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ishob-scheduled-webhook-alarm-a47fdf8e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.ishob.com](https://www.zero.xyz/host/api.ishob.com/llms.txt)