x402radar
List

Best x402 monitoring APIs

16 x402 monitoring APIs catalogued, ranked by Trust score (uptime, success rate, latency and price, on real traffic). 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
26647%348 ms$0.001 – $0.01519$0.33186
36352%90 ms$0.001 – $0.00212$0.2038Payments per day, last 7 days
46262%116 ms$0.0051——
56060%274 ms$0.011——
65959%20 ms$0.051——
75555%344 ms$0.005 – $0.012——
85252%336 ms$0.0011——
95252%350 ms$0.011——
105050%88 ms$0.001 – $0.015——
114545%1742 ms$0.0051——
123040%83 ms$0.1 – $1.55——
1399%100 ms$0.003 – $1012——
1477%22 ms$0.0005 – $49227——
1500%22 ms$0.001 – $0.05373——
1600%1743 ms$0.0051——

FAQ

What is the cheapest x402 monitoring API?
GPT-5.5 Compact Chat x402 — from $0.0001 – $0.066667 per call.
Which x402 monitoring API is the most reliable?
AegisAGI Security, at 62% measured uptime.
What is the best x402 monitoring API right now?
GPT-5.5 Compact Chat x402, with the highest x402radar Trust score (76).
How are these x402 monitoring APIs ranked?
By x402radar Trust — a composite of measured uptime, success rate, /quote latency and price, computed on real traffic and refreshed hourly.