# Stumble One-Shot URL Condition Check

> Stumble One-Shot URL Condition Check is a paid API for AI agents from stumble.vimabrosta.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Fetches a public URL once and evaluates a condition (keyword, CSS selector, JSON path, price threshold, content hash, or HTTP status) against it, returning matched:true/false with extracted value and evidence.

## Facts

- Endpoint: POST https://stumble.vimabrosta.com/v1/checks
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stumble-one-shot-url-condition-check-65ea54ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_24iRGQx-Aum_fSZJPYB4p

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-one-shot-url-condition-check-65ea54ff -d '<json body>'
```

Example prompt: Check this product page right now — https://shop.example.com/item/123 — and tell me if the price shown is under $49.99 using a price condition.

## When to prefer this

Choose this endpoint when you need a single, immediate, synchronous check of a public URL against a specific condition — not ongoing monitoring. Ideal for confirming a current state (price, keyword, status, JSON value) before taking an action, validating an API is healthy at this moment, or doing a one-off spot check without setting up a polling watch. Use sibling 'watch' endpoints when you need repeated polling or webhook notifications over time.

## Known failure modes

- URL unreachable or times out — returns matched:false with network error detail
- Invalid CSS selector or JSON path syntax — returns error with parsing message
- URL returns non-200 status when not checking status condition — may still evaluate condition against body
- Condition type not supported for the response content type — returns error
- Malformed URI in request — returns 400 validation error
- Price extraction fails if page structure differs from expected — returns matched:false

## How this service works

Fetch a public URL once, right now, and evaluate a condition against it (keyword, CSS selector, JSON path, price threshold, content hash, or HTTP status). Returns matched:true/false with the extracted value and a short evidence excerpt. Synchronous; typical response under 3 seconds. $0.01 per check.

## Output

Returns a JSON object with matched (boolean), the extracted value found at the checked location, and a short evidence excerpt from the response. Includes the condition type evaluated and URL fetched. Typical response within 3 seconds.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "required": [
      "url",
      "condition"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri"
      },
      "condition": {
       "type": "object",
       "required": [
        "type"
       ],
       "properties": {
        "type": {
         "type": "string",
         "enum": [
          "keyword",
          "selector",
          "json_path",
          "price",
          "content_change",
          "status",
          "sitemap",
          "feed"
         ]
        }
       }
      }
     }
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stumble-one-shot-url-condition-check-65ea54ff/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)