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List

Most reliable x402 monitoring APIs

16 x402 monitoring APIs catalogued, ranked by measured uptime. Updated September 15, 2026.

Top pick79Mru-oracle100% uptime · from $0.001 – $0.015/call
BestCheapestMost reliable
#API
1$0.18107▼ 66.7%$0.001 – $0.01528208 ms79
2$0.03*5$0.002 – $0.0152067 ms63
3——$0.0005 – $49227211 ms—
4——$0.1 – $1.55114 ms—
5$0.04*2$0.005 – $0.023198 ms—
6——$0.0051116 ms—
7——$0.001 – $0.0537390 ms—
8——$0.001 – $0.01595 ms—
9——$0.00513988 ms—
10——$0.011320 ms—
11——$0.0011431 ms—
12——$0.0001 – $10238786 ms—
13$604.79*30,234+▼ 89.5%$0.001 – $0.123178 ms55
14——$0.00005 – $0.00527——
15——$0.003 – $101247 ms—
16——$0.0051——

FAQ

What is the cheapest x402 monitoring API?
Notify — from $0.00005 – $0.005 per call.
Which x402 monitoring API is the most reliable?
Mru-oracle, at 100% measured uptime.
What is the best x402 monitoring API right now?
Mru-oracle, with the highest 402radar Trust score (79).
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.