the402 endpoint detail

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toolbelt402.tpoborne.workers.dev url preflight

https://toolbelt402.tpoborne.workers.dev/url/preflight

answers 402

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.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.005
Network
base
Pay to
0x06b40bf8Dfdc45049ea7f600c84301E227a2Ca15
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
419 ms
Payment options
1 usable of 1
Last checked
2026-09-06T01:19:16.721Z (26d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Ftoolbelt402.tpoborne.workers.dev%2Furl%2Fpreflight"