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Best x402 generation APIs

12 x402 generation APIs catalogued, ranked by Trust score (uptime, success rate, latency and price, on real traffic). Updated September 28, 2026. Few scored providers so far — this ranking firms up as more data arrives.

Top pick70gpt55.558686.xyz100% uptime · from $0.0001 – $10/call
BestCheapestMost reliable
#API
1$9.43*17▲ 100.0%$0.0001 – $10241763 ms70
2——$0.0005 – $49227176 ms—
3——$0.001 – $0.0537338 ms—
4——$0.00005 – $0.00527——
5$0.024▲ 100.0%$0.001 – $0.1519492 ms—
6——$0.02 – $0.053381 ms—
7——$0.011——
8——$0.01129 ms—
9——$0.005 – $0.0111——
10——$0.001 – $0.01254 ms—
11——$0.0008 – $0.157475 ms—
12——$0.002223 ms—

FAQ

What is the cheapest x402 generation API?
Notify — from $0.00005 – $0.005 per call.
Which x402 generation API is the most reliable?
gpt55.558686.xyz, at 100% measured uptime.
What is the best x402 generation API right now?
gpt55.558686.xyz, with the highest 402radar Trust score (70).
How are these x402 generation APIs ranked?
By 402radar Trust — a composite of measured uptime, success rate, /quote latency and price, computed on real traffic and refreshed hourly.