Most reliable x402 verification APIs

25 x402 verification APIs catalogued, ranked by measured uptime. Updated June 17, 2026.

Top pick78Token Price Snapshot80% uptime · from $0.001 – $0.95/call
BestCheapestMost reliable
#API
17880%38 ms$0.001 – $0.9525$1.0936Payments per day, last 7 days
26262%90 ms$0.011
36161%89 ms$0.0011
47660%652 ms$0.0001 – $0.06666779$0.18*85Payments per day, last 7 days
56060%91 ms$0.011
65959%20 ms$0.051
75858%89 ms$0.011
85757%84 ms$0.005 – $0.012
95656%305 ms$0.0051
105555%344 ms$0.005 – $0.012
117152%750 ms$0.001 – $0.0053$7.8060Payments per day, last 7 days
125252%104 ms$0.0011
135651%21 ms$0.005 – $0.1516$0.4720Payments per day, last 7 days
145050%89 ms$0.0005 – $0.0012
155050%88 ms$0.001 – $0.015
164848%104 ms$0.0011
176647%348 ms$0.001 – $0.01519$0.33186
184343%320 ms$0.05 – $0.39
194343%88 ms$0.011
204141%88 ms$0.011
213040%83 ms$0.1 – $1.55
225439%166 ms$0.005 – $0.0517$0.30*22Payments per day, last 7 days
233333%213 ms$0.00110
2477%22 ms$0.0005 – $49227
2500%22 ms$0.001 – $0.05373

FAQ

What is the cheapest x402 verification API?
GPT-5.5 Compact Chat x402 — from $0.0001 – $0.066667 per call.
Which x402 verification API is the most reliable?
Token Price Snapshot, at 80% measured uptime.
What is the best x402 verification API right now?
Token Price Snapshot, with the highest x402radar Trust score (78).
How are these x402 verification APIs ranked?
By x402radar Trust — a composite of measured uptime, success rate, /quote latency and price, computed on real traffic and refreshed hourly.