Tool detail

URL Uptime Checker

Checks whether a given URL is currently reachable and reports its HTTP status code and response time.

Categories: Domains IP

Use when

check if a website is up before treating it as reachable
measure how fast a URL responds right now

Not for

not a historical uptime-monitoring log, a single point-in-time check
not a full page-content fetch, status and timing only

Inputs

POST JSON body: { url: string } (required); optional follow_redirects (boolean, default true), method (GET/HEAD, default GET).

Admitted input schema

{
  "type": "object",
  "properties": {
    "follow_redirects": {
      "type": "boolean",
      "description": "Whether to follow redirects to their final destination before reporting the result. Defaults to true."
    },
    "method": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Which kind of request to send: 'GET' to fetch the page or 'HEAD' to just check reachability faster. Defaults to 'GET'."
    },
    "url": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "The full web address to check, including http:// or https:// at the start."
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Endpoint

Method: POST
URL: https://url-uptime-checker.underscoredone.com/check

Payment

Protocol: x402
Listed price: 0.01 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: POST https://url-uptime-checker.underscoredone.com/check
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z