x402radar
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Cheapest x402 generation APIs

16 x402 generation APIs catalogued, ranked by price per call (cheapest first). Updated June 17, 2026.

Top pick76GPT-5.5 Compact Chat x40260% uptime · from $0.0001 – $0.066667/call
BestCheapestMost reliable
#API
17660%652 ms$0.0001 – $0.06666779$0.18*85Payments per day, last 7 days
277%22 ms$0.0005 – $49227——
36047%534 ms$0.0008 – $0.157$0.04*8Payments per day, last 7 days
400%37 ms$0.001 – $0.012——
500%22 ms$0.001 – $0.05373——
66551%463 ms$0.001 – $0.1514$8.73128Payments per day, last 7 days
75050%91 ms$0.0012——
85555%90 ms$0.0021——
95252%21 ms$0.0022——
105757%90 ms$0.0021——
115050%89 ms$0.0051——
1200%24 ms$0.005 – $0.0111——
1300%1407 ms$0.011——
146060%46 ms$0.011——
155454%992 ms$0.021——
165454%168 ms$0.021——

FAQ

What is the cheapest x402 generation API?
GPT-5.5 Compact Chat x402 — from $0.0001 – $0.066667 per call.
Which x402 generation API is the most reliable?
GPT-5.5 Compact Chat x402, at 60% measured uptime.
What is the best x402 generation API right now?
GPT-5.5 Compact Chat x402, with the highest x402radar Trust score (76).
How are these x402 generation APIs ranked?
By x402radar Trust — a composite of measured uptime, success rate, /quote latency and price, computed on real traffic and refreshed hourly.