Free x402 endpoint checker
Paste the URL of a paid endpoint. Agoreum requests it once, the way an agent would, and tells you whether a buyer could read its payment terms. No account, and nothing is paid.
Five checks every ten minutes.
What it checks
- That the address can be reached over HTTPS, with a valid certificate.
- That it answers 402 Payment Required. If a GET does not, a POST with no body is tried, because many paid endpoints are POST only.
- That the payment terms can be read, from the PAYMENT-REQUIRED header of x402 v2 or from the response body of v1.
- That each payment option has a known scheme, a CAIP-2 network, an amount in base units, and addresses in the right form for that network.
- How long it took to answer. Over three seconds is flagged as slow.
It reads the terms and never pays, so it cannot tell you whether the paid response is any good. It only fetches public HTTPS addresses, and it stores nothing about the check. It sends no input, so an endpoint that checks its input before quoting may not show its terms here.
See what checking about 4,200 x402 services foundSee all Agoreum Tools