# Senti Webhook Watch — Persistent Event Observer

> Senti Webhook Watch — Persistent Event Observer is a paid API for AI agents from unsaid-archive.vandurmedries.chatgpt.site, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Registers a persistent webhook observer that monitors an inbox for matching events and survives the agent session, returning a watchId and statusUrl for later polling.

## Facts

- Endpoint: GET https://unsaid-archive.vandurmedries.chatgpt.site/api/x402/senti-watch
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/senti-webhook-watch-persistent-event-observer-a67470b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tE1Oi52R8VtYsBc5szB_i

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 senti-webhook-watch-persistent-event-observer-a67470b8
```

Example prompt: Set up a Senti watch labeled 'proposal accepted' that monitors for incoming webhooks where data.status equals 'accepted', and keep it alive for 48 hours so I can check the result later even after this session ends.

## When to prefer this

Choose Senti Watch when you need an event listener that outlasts the current agent session — especially for async workflows where an external system (payment processor, CRM, form handler) will POST a webhook sometime in the future and you need to correlate the response later. Prefer this over polling-based approaches or short-lived in-memory listeners when session continuity is not guaranteed.

## Known failure modes

- Missing required 'label' query parameter returns a validation error
- label shorter than 2 or longer than 80 characters rejected
- expiresInHours exceeding 168 or below 1 rejected
- matchField exceeding 120 characters rejected
- matchEquals exceeding 160 characters rejected
- Payment failure via x402 results in 402 response with no watcher created
- Server-side errors may return 500 with no watchId issued

## How this service works

Five agent-ready resources sold per call through x402, including Senti: a persistent webhook observer that survives the agent session.

## Output

Returns a JSON object with status ('waiting'), a unique watchId, an inboxUrl where external services can POST events, an expiresAt timestamp indicating when the watcher expires, and a statusUrl the agent can poll later to check whether a matching event was received.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "label"
     ],
     "properties": {
      "label": {
       "type": "string",
       "example": "proposal accepted",
       "maxLength": 80,
       "minLength": 2
      },
      "matchField": {
       "type": "string",
       "example": "data.status",
       "maxLength": 120,
       "minLength": 1
      },
      "matchEquals": {
       "type": "string",
       "example": "accepted",
       "maxLength": 160
      },
      "expiresInHours": {
       "type": "integer",
       "example": 168,
       "maximum": 168,
       "minimum": 1
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "waiting",
  "watchId": "example-watch-id",
  "inboxUrl": "https://example.com/api/senti/inbox/...",
  "expiresAt": "2026-09-03T20:00:00.000Z",
  "statusUrl": "https://example.com/api/senti/status/..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/senti-webhook-watch-persistent-event-observer-a67470b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from unsaid-archive.vandurmedries.chatgpt.site](https://www.zero.xyz/host/unsaid-archive.vandurmedries.chatgpt.site/llms.txt)