79trust / 100
Url Preflight
by toolbelt402.tpoborne.workers.dev in Weather & location
x402 APIPassing, checked 1 h ago
Check a URL before fetching it: is it alive, final URL after redirects, HTTP status, content type, HTML title, and whether robots.txt allows your user-agent. Link checker and fetch preflight for agents.
GET https://toolbelt402.tpoborne.workers.dev/url/preflight
Last 30 days
All checks passedSome failedAll failedNot checked
- Uptime
- 100%
- Response time
- 614 ms typical, 707 ms slowest 5%
- Last check
- 1 h ago
- Next check
- any minute now
How to call it
# See the payment challenge (nothing is charged)
curl -i -X GET "https://toolbelt402.tpoborne.workers.dev/url/preflight?ua=my-agent%2F1.0&url=https%3A%2F%2Fexample.com%2F"import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
const client = new x402Client().register(
"eip155:8453",
new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);
// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftoolbelt402.tpoborne.workers.dev%2Furl%2Fpreflight
const res = await pay("https://toolbelt402.tpoborne.workers.dev/url/preflight?ua=my-agent%2F1.0&url=https%3A%2F%2Fexample.com%2F");
console.log(await res.json());Example input
{
"ua": "my-agent/1.0",
"url": "https://example.com/"
}Example output
{
"alive": true,
"contentType": "text/html; charset=UTF-8",
"finalUrl": "https://example.com/",
"redirects": [],
"requestedUrl": "https://example.com/",
"robots": {
"allowed": true,
"fetched": true,
"group": "*",
"matchedRule": null
},
"status": 200,
"timingMs": 350,
"title": "Example Domain"
}Security scan
- No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.
Recent checks
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 1 h ago | Passed | 402 | 548 ms | $0.005 |
| 5 h ago | Passed | 402 | 707 ms | $0.005 |
| 8 h ago | Passed | 402 | 603 ms | $0.005 |
| 12 h ago | Passed | 402 | 656 ms | $0.005 |
| 16 h ago | Passed | 402 | 614 ms | $0.005 |
| 20 h ago | Passed | 402 | 636 ms | $0.005 |
| 23 h ago | Passed | 402 | 635 ms | $0.005 |
| 27 h ago | Passed | 402 | 591 ms | $0.005 |
| 30 h ago | Passed | 402 | 476 ms | $0.005 |
| 34 h ago | Passed | 402 | 494 ms | $0.005 |
| 39 h ago | Passed | 402 | 866 ms | $0.005 |