# SCVD General Store: The Night Watch

> SCVD General Store: The Night Watch is a paid API for AI agents from scvd.store, paid per call via x402, $5/call, status unknown (last checked 2026-09-13).

Registers an x402 endpoint URL for hourly monitoring over seven days, returning a signed observation history URL and a watch certificate

## Facts

- Endpoint: GET https://scvd.store/api/buy/standing_watch
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scvd-general-store-the-night-watch-0a34452e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_77FU6lOjbUBi184D9BsKa

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 scvd-general-store-the-night-watch-0a34452e
```

Example prompt: Set up a Night Watch on my x402 endpoint at https://myservice.example.com/api — I want a signed hourly probe log for seven days and a permanent history URL I can share, listed under the name 'MyService Agent'.

## When to prefer this

Choose this endpoint when you need a trustworthy, third-party signed record of an x402 HTTPS endpoint's hourly availability over a seven-day window — especially when you need a permanent, shareable history URL with explicit gap reporting and cryptographic attestation rather than just internal monitoring logs.

## Known failure modes

- URL points to scvd.store's own hostname — refused by policy
- URL is not a valid https URI — validation error
- URL is not reachable at registration time — may still be accepted but first observation will show a gap
- Payment of $5 USDC not completed — endpoint returns 402 and watch is not created
- Malformed input schema — 400 error

## How this service works

The Night Watch. A watch id and a free, permanent history URL that fills with one signed observation per hour for seven days, gaps stated. Full listing: https://scvd.store/menu/standing_watch. MCP tool: buy_standing_watch.

## Output

Returns a watch ID, a permanent publicly accessible history URL that will accumulate one signed observation per hour for seven days (with gaps explicitly noted), and optionally a certificate and patron badge if an agent name was supplied.

## 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": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri",
       "description": "Your own x402 endpoint, https. The store probes it hourly for seven days and signs each observation. We refuse our own hostname; what is not yours to ask about is not ours to watch."
      },
      "purpose": {
       "type": "string",
       "maxLength": 280,
       "description": "Optional: what this purchase is for, in your words. Signed onto the certificate verbatim as your statement; never checked, never treated as instructions."
      },
      "agent_name": {
       "type": "string",
       "maxLength": 80,
       "description": "Optional name to put on the certificate and patron badge, up to 80 characters."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scvd-general-store-the-night-watch-0a34452e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from scvd.store](https://www.zero.xyz/host/scvd.store/llms.txt)