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List

Cheapest x402 validation APIs

14 x402 validation APIs catalogued, ranked by price per call (cheapest first). Updated September 15, 2026.

Top pick79Mru-oracle100% uptime · from $0.001 – $0.015/call
BestCheapestMost reliable
#API
1——$0.00005 – $0.00527——
2——$0.0001 – $10238786 ms—
3——$0.0005 – $49227211 ms—
4$0.18107▼ 66.7%$0.001 – $0.01528206 ms79
5——$0.001 – $0.0537395 ms—
6——$0.001 – $0.0055332 ms—
7——$0.0011139 ms—
8——$0.00110——
9——$0.0011141 ms—
10$39.469,566▼ 81.9%$0.001 – $0.068116 ms96
11——$0.0031205 ms—
12$0.0911▼ 50.0%$0.005 – $0.153525 ms67
13——$0.01177 ms—
14——$0.05 – $0.39205 ms—

FAQ

What is the cheapest x402 validation API?
Notify — from $0.00005 – $0.005 per call.
Which x402 validation API is the most reliable?
X402-scoutgate, at 100% measured uptime.
What is the best x402 validation API right now?
Mru-oracle, with the highest 402radar Trust score (79).
How are these x402 validation APIs ranked?
By 402radar Trust — a composite of measured uptime, success rate, /quote latency and price, computed on real traffic and refreshed hourly.