api.usenami.io/v1/perp/arbitrage/price
Usenami · grade D · score 48.8 · confidence 0.61
As of 2026-06-30, api.usenami.io/v1/perp/arbitrage/price on Base responded to 64.3% of 28 reliability checks over the past 30 days — often enough to use, but with outages frequent enough to plan around. Responses came back sluggish at 821 ms median and it has held its advertised price steady at $0.0030. Its x402-trust grade is D (score 48.8 from a moderate sample, tracked for 18 days), so it is best avoided for now. It is no longer listed in the x402 directory.
| Trust grade | D (score 48.8) |
| Recommendation | avoid |
| Confidence | 0.61 — free tier, reduced density (every 6th probe) |
| 30-day uptime | 64.3% |
| Median latency | 821 ms |
| Probes (30d, sampled) | 28 |
| Advertised price | $0.003 USDC |
| Price stability (30d) | stable |
| Network | eip155:8453 |
| First seen | 2026-06-12 |
| Last probed | 2026-06-25 |
| Status | delisted |
| Snapshot computed | 2026-06-30 19:11 UTC |
Need more than the free snapshot? The paid API adds a live probe at decision time (with timestamp), full 30-minute probe density & confidence, 90-day history, on-chain settlement correlation, and watch/alerting.
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POST /v1/x402-trust · POST /v1/x402-history · free MCP: npx -y x402-trust-mcp