Seller tools
Check the 402 before an agent does.
A valid payment challenge is the first contract with a buyer. Validate the status, headers, price, network and payout wallet before you list.
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Claim the endpoint so you can manage metadata, payout wallet and verification history.
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The payments guide covers the 402 shape, the facilitator, Base USDC and the provider-side checklist.
Read the payments guideCommon questions
What does the validator check?+
It calls your endpoint once without payment and checks that it returns HTTP 402 with a readable payment challenge. It inspects the scheme, network, asset, amount, payTo wallet and Bazaar extension. It does not pay or sign anything.
Why does it only accept HTTPS?+
A public paid endpoint should be reachable over TLS. The validator also blocks private and internal addresses so it cannot be used to probe internal infrastructure.
Does a passing check mean my endpoint is verified?+
No. A valid 402 only proves that the endpoint asks to be paid. Settlement verification requires a real paid call that returns product and a public receipt.
How do I get the verified badge?+
Submit the listing, then request a paid verification check. APIStead pays one named route from its own wallet, checks the response and publishes the receipt. The badge covers that route, not the whole listing.