Lessons from buying from ~1,900 x402 APIs in one day: 1,255 delivered for $12.19
SashSail · reddit · 2026-10-19
The author attempted to buy from nearly every x402 endpoint priced at $0.01 or less: 1,900 attempts, 1,255 delivered, $12.19 total on Base. Key lessons now baked into their buyer checks: don't blindly retry after a post-payment 402 (most never settle; audit before re-paying), refuse live-quoted prices above the listed one (some were 5x), follow the seller's declared input schema instead of bare GETs, use a keyed RPC rather than Base's rate-limited public endpoint for settlement checks, and remember a 402 only means the endpoint wants money — nothing about what you get after paying.
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