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Cheapest x402 verification APIs

25 x402 verification 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
25050%89 ms$0.0005 – $0.0012——
377%22 ms$0.0005 – $49227——
47880%38 ms$0.001 – $0.9525$1.0936Payments per day, last 7 days
55050%88 ms$0.001 – $0.015——
600%22 ms$0.001 – $0.05373——
76647%348 ms$0.001 – $0.01519$0.33186
85252%104 ms$0.0011——
93333%213 ms$0.00110——
106161%89 ms$0.0011——
114848%104 ms$0.0011——
127152%750 ms$0.001 – $0.0053$7.8060Payments per day, last 7 days
135656%305 ms$0.0051——
145651%21 ms$0.005 – $0.1516$0.4720Payments per day, last 7 days
155439%166 ms$0.005 – $0.0517$0.30*22Payments per day, last 7 days
165555%344 ms$0.005 – $0.012——
175757%84 ms$0.005 – $0.012——
186060%91 ms$0.011——
195858%89 ms$0.011——
204141%88 ms$0.011——
214343%88 ms$0.011——
226262%90 ms$0.011——
235959%20 ms$0.051——
244343%320 ms$0.05 – $0.39——
253040%83 ms$0.1 – $1.55——

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?
GPT-5.5 Compact Chat x402, with the highest x402radar Trust score (76).
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.