x402radar
List

Most reliable x402 generation APIs

16 x402 generation APIs catalogued, ranked by measured uptime. 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
26060%46 ms$0.011——
35757%90 ms$0.0021——
45555%90 ms$0.0021——
55454%992 ms$0.021——
65454%168 ms$0.021——
75252%21 ms$0.0022——
86551%463 ms$0.001 – $0.1514$8.73128Payments per day, last 7 days
95050%91 ms$0.0012——
105050%89 ms$0.0051——
116047%534 ms$0.0008 – $0.157$0.04*8Payments per day, last 7 days
1277%22 ms$0.0005 – $49227——
1300%22 ms$0.001 – $0.05373——
1400%37 ms$0.001 – $0.012——
1500%1407 ms$0.011——
1600%24 ms$0.005 – $0.0111——

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.