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List

Cheapest x402 research APIs

14 x402 research APIs catalogued, ranked by price per call (cheapest first). Updated September 27, 2026. Few scored providers so far — this ranking firms up as more data arrives.

Top pick75Mru-oracle100% uptime · from $0.001 – $0.015/call
BestCheapestMost reliable
#API
1——$0.00005 – $0.00527——
2——$0.0001 – $10241746 ms—
3——$0.0005 – $49227180 ms—
4——$0.001 – $0.002426 ms—
5——$0.0013442 ms—
6——$0.0011118 ms—
7$0.1045▼ 50.0%$0.001 – $0.01528202 ms75
8——$0.001 – $0.0537348 ms—
9——$0.002224 ms—
10$0.2222▼ 100.0%$0.004 – $0.117202 ms71
11——$0.0051281 ms—
12——$0.011——
13——$0.0121080 ms—
14——$0.012 – $0.1112465 ms—

FAQ

What is the cheapest x402 research API?
Notify — from $0.00005 – $0.005 per call.
Which x402 research API is the most reliable?
gpt55.558686.xyz, at 100% measured uptime.
What is the best x402 research API right now?
Mru-oracle, with the highest 402radar Trust score (75).
How are these x402 research APIs ranked?
By 402radar Trust — a composite of measured uptime, success rate, /quote latency and price, computed on real traffic and refreshed hourly.