# Longwatch Watch Alerts Poll

> Longwatch Watch Alerts Poll is a paid API for AI agents from longwatch.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-09).

Poll a standing watch for new alerts (SEC filings, page changes, RSS items, crypto prices) since a given cursor position

## Facts

- Endpoint: GET https://longwatch.dev/watches/%7Bid%7D/alerts?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/longwatch-watch-alerts-poll-39873541
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8tOG43_VnHmMfH8E7JeKZ

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 longwatch-watch-alerts-poll-39873541
```

Example prompt: Check my longwatch watch abc123 for any new alerts since the last one I saw (sequence 7) — use watch key xyz789.

## When to prefer this

Use this endpoint when you have already created a standing watch via POST /watches and need to retrieve accumulated alerts between agent runs. This is the correct polling endpoint when you have a watch_id and key and want incremental updates since a known cursor — not for one-shot lookups (use the snapshot endpoint instead).

## Known failure modes

- Invalid or expired watch_id returns 404 or empty alerts
- Missing or wrong watch key returns 401 unauthorized
- Since cursor higher than latest sequence returns empty alert list
- Watch has been cancelled or expired, status field reflects this
- Network or payment failure results in no response or 402 payment required

## How this service works

You are ephemeral. longwatch remembers what you already saw. Create a watch, persist watch_id + key, poll later for only what you missed — pages, RSS, crypto prices, SEC filings. No API key, no account — pay per call in USDC.

## Output

Returns a list of new alerts since the given cursor, each with a sequence number, alert kind (e.g. 'filing'), and form type (e.g. '8-K', 'Form 4'). Also returns the new cursor value to use on the next poll and the current watch status (e.g. 'active').

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "id"
     ],
     "properties": {
      "id": {
       "type": "string",
       "description": "watch_id returned by POST /watches"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "key"
     ],
     "properties": {
      "key": {
       "type": "string",
       "description": "watch key returned at creation"
      },
      "since": {
       "type": "number",
       "description": "cursor: highest alert seq already seen (0 on first poll)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "alerts": [
   {
    "seq": 7,
    "form": "8-K",
    "kind": "filing"
   }
  ],
  "cursor": 7,
  "status": "active",
  "watch_id": "5b2e…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/longwatch-watch-alerts-poll-39873541/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from longwatch.dev](https://www.zero.xyz/host/longwatch.dev/llms.txt)