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List

Most reliable x402 monitoring APIs

16 x402 monitoring APIs catalogued, ranked by measured uptime. Updated August 5, 2026.

Top pick84Mru-oracle100% uptime · from $0.001 – $0.015/call
BestCheapestMost reliable
# API
1 $0.39 287 ▲ 100.0% $0.001 – $0.015 28 — 84
2 $0.27* 50 $0.002 – $0.015 20 — 75
3 — — $0.001 1 — —
4 — — $0.0005 – $49 227 — —
5 — — $0.005 1 — —
6 — — $0.005 – $0.01 2 — —
7 — — $0.001 – $0.01 5 — —
8 — — $0.01 1 — —
9 — — $0.1 – $1.5 5 — —
10 — — $0.005 1 — —
11 $109.49* 9,426 ▼ 63.3% $0.0001 – $10 226 — 94
12 — — $0.001 – $0.05 373 — —
13 $386.20* 19,302 $0.001 – $0.1 23 — 48
14 $0.09 17 $0.00005 – $0.005 27 — 24
15 — — $0.003 – $10 12 — —
16 — — $0.005 1 — —

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 (84).
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.