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List

Cheapest x402 monitoring APIs

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

Top pick55SniperX0% uptime · from $0.001 – $0.1/call
BestCheapestMost reliable
#API
1——$0.00005 – $0.00527——
2——$0.0001 – $10238786 ms—
3——$0.0005 – $49227211 ms—
4——$0.001 – $0.01595 ms—
5$604.79*30,234+▼ 89.5%$0.001 – $0.123178 ms55
6——$0.001 – $0.0537395 ms—
7$0.18107▼ 66.7%$0.001 – $0.01528208 ms79
8——$0.0011431 ms—
9$0.03*5$0.002 – $0.0152067 ms63
10——$0.003 – $101247 ms—
11——$0.00513988 ms—
12——$0.0051——
13——$0.0051116 ms—
14$0.04*2$0.005 – $0.023198 ms—
15——$0.011320 ms—
16——$0.1 – $1.55114 ms—

FAQ

What is the cheapest x402 monitoring API?
Notify — from $0.00005 – $0.005 per call.
Which x402 monitoring API is the most reliable?
X402-scoutgate, at 100% measured uptime.
What is the best x402 monitoring API right now?
SniperX, with the highest 402radar Trust score (55).
How are these x402 monitoring APIs ranked?
By 402radar Trust — a composite of measured uptime, success rate, /quote latency and price, computed on real traffic and refreshed hourly.