# Stumble Fast Watch

> Stumble Fast Watch is a paid API for AI agents from stumble.vimabrosta.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).

Polls a public URL every 60 seconds for up to 7 days and notifies via webhook or poll when a specified condition (keyword, selector, JSON path, price, content change, or HTTP status) becomes true

## Facts

- Endpoint: POST https://stumble.vimabrosta.com/v1/watches/fast
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stumble-fast-watch-39b20956
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZzEcRSl7ljXgZpMp3B2Cn

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 stumble-fast-watch-39b20956 -d '<json body>'
```

Example prompt: Watch https://shop.example.com/product/sneakers every 60 seconds for up to 3 days and send a webhook POST to https://hooks.myserver.com/restock in JSON format the moment the keyword 'Add to Cart' appears on the page.

## When to prefer this

Choose this endpoint over the standard watch (15-min polling) when you need near-real-time detection — such as limited-quantity restocks, appointment slots that fill within minutes, or rapid status changes. The 60-second polling interval costs $0.50 USDC flat with no account required. If you need even faster detection (10-second polling) use the sniper watch; if 15-minute polling is sufficient, the standard watch is more economical.

## Known failure modes

- Target URL is unreachable or returns non-200 status consistently — watch may never trigger
- Condition type misconfigured (e.g. wrong JSON path syntax) — condition never matches
- Webhook URL is unreachable when condition fires — notification is lost
- Duration exceeds 7-day maximum — request rejected
- URL is not a public endpoint — polling fails with connection errors
- Payment of $0.50 USDC not received — watch not created

## How this service works

Create a fast watch: Stumble polls a public URL every 60 seconds for up to 7 days and notifies your webhook (or lets you poll for free) the moment a condition becomes true (keyword, selector, JSON path, price, content change, HTTP status). One-time $0.50, no account needed. Ideal for restocks and appointment slots.

## Output

Returns a watch ID and confirmation that the fast-polling watch has been created. Stumble then polls the target URL every 60 seconds and, when the specified condition becomes true, either calls your webhook URL with a JSON/Slack/Discord payload or makes the result available for you to poll, depending on the notification mode selected.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "url",
      "condition"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri"
      },
      "notify": {
       "type": "object",
       "required": [
        "mode"
       ],
       "properties": {
        "url": {
         "type": "string"
        },
        "mode": {
         "enum": [
          "webhook",
          "poll"
         ],
         "type": "string"
        },
        "format": {
         "enum": [
          "json",
          "slack",
          "discord"
         ],
         "type": "string"
        }
       }
      },
      "condition": {
       "type": "object",
       "required": [
        "type"
       ],
       "properties": {
        "type": {
         "enum": [
          "keyword",
          "selector",
          "json_path",
          "price",
          "content_change",
          "status",
          "sitemap",
          "feed"
         ],
         "type": "string"
        }
       }
      },
      "duration_days": {
       "type": "number",
       "maximum": 7
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "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/stumble-fast-watch-39b20956/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stumble.vimabrosta.com](https://www.zero.xyz/host/stumble.vimabrosta.com/llms.txt)