The seven most common x402 seller mistakes, and how to fix them
This story is from 2026-10-18. It is preserved in the archive; the latest stories are on the live feed.
An x402 API asks for payment with an HTTP 402 Payment Required answer, and an AI agent pays it per call in stablecoins. That only works when the 402 is exactly what the agent's client expects. x402 Doctor calls every paid endpoint it can find once a day, about 50,000 of them, the way a paying agent…
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- 2026-10-18 20:29 · DEV Community — AI
The seven most common x402 seller mistakes, and how to fix them