x402 seller gotchas, part 3: miscounted buyers, and an API key that expired quietly
This story is from 2026-10-14. It is preserved in the archive; the latest stories are on the live feed.
In part 1 we listed what broke while selling four small services over x402 (pay per request, USDC on Base). In part 2 we wrapped the shop in an MCP server. Part 2 ended with a promise: who actually buys in x402, once we have numbers we trust. This part is about why that took longer than planned. Ou…
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- 2026-10-14 12:52 · DEV Community — AI
x402 seller gotchas, part 3: miscounted buyers, and an API key that expired quietly