2s.io/api/fx/timeseries
As of 2026-09-14, 2s.io/api/fx/timeseries on Base responded to 94.3% of 35 reliability checks over the past 30 days, often enough to use but with outages frequent enough to plan around. Responses came back sluggish at 855 ms average from a single EU vantage point (so this includes network distance to the endpoint) and it has held its advertised price steady at $0.0036. Its x402-trust grade is A (score 84.6 from a moderate sample, tracked for 93 days), so it currently looks safe to use.
The latest analysis recorded 1 warning for this endpoint.
This page is a cached snapshot (computed 2 hours ago, refreshed at least every 24h): it tells you what the verdict is, not why. What each flag says, which wallet or network it concerns and the evidence behind it is the paid trust report, re-probed live at the moment you ask.
A wallet payment page opens first; approve the USDC payment and the full JSON report loads right in your browser. Agents use the x402_trust_score MCP tool or POST /v1/x402-trust directly. Want a taste first? Read a free full sample report.
Historical daily exchange-rate series from the European Central Bank (via Frankfurter), with computed summary statistics. Pass base = 3-letter ISO 4217 currency (default USD), start = YYYY-MM-DD, optional end = YYYY-MM-DD (default = latest available), optional symbols = comma-separated target codes (default all), optional amount to scale rates (default 1). Range is capped at 366 days. Returns, per target currency, first/last/min/max/mean rate plus absolute and percentage change over the window, alongside the full daily series. ECB publishes on business days only; weekends and holidays are omit(Provider-supplied: an unverified claim, not checked by us. The trust grade above is our independent measurement.)
Latency is measured from a single EU vantage point; includes network round-trip distance to the endpoint; a geographically distant endpoint reads slower even when its server is fast, so it is only lightly weighted in the score.
Full observation record ▾
| Trust grade | A (score 84.6) |
| Recommendation | proceed |
| Confidence | 0.65, full-density (every probe in the 30-day window) |
| 30-day uptime | 94.3% |
| Avg latency (EU vantage) | 855 ms |
| Probes (30d) | 35 |
| Advertised price | $0.0036 USDC |
| Price stability (30d) | stable |
| Pay on Base | $0.00144 USDC · to 0x2b6D…32C5 ↗ |
| Pay on Solana | $0.00144 USDC · to TW6nta…yWhn ↗ |
| First seen | 2026-06-13 |
| Last probed | 2026-09-14 |
| Status | listed |
| Snapshot computed | 2026-09-14 20:03 UTC |
- ✓Live probe at decision time:
We re-check the endpoint the moment you ask (timestamped) and compute the score from all scores up until this moment, instead of this cached snapshot that may be up to 24h old. - ✓Instant snapshot refresh:
Every paid call also re-writes this cached snapshot, so the page, badge and card update immediately instead of waiting for the 24h cycle. - ✓Confidence band, full component breakdown & structured risk flags:
Exactly why the score is what it is, machine-readable. - ✓On-chain settlement proof:
Real USDC volume & distinct-payer count for the payTo wallet: is anyone actually paying it? - ✓90-day raw history:
Every listing/price/payTo change and probe result (viaPOST /v1/x402-history), up to 90 days back. - ✓The ranked better-scored alternatives:
The resource URLs, scores & prices we don't reveal above (viaPOST /v1/similar), if there are better alternatives available. - ✓Change & liveness alerts:
Get notified on payTo/price changes, spec regressions or downtime (viaPOST /v1/watch-endpoint-30d). Connect up to 10 Discord / Slack webhooks or poll regularly with bearer auth. Increases probe-density to every 5 minutes instead of the usual 30 for the watched endpoint.
... Simply give your agents the tools to do all of that for you, with a simple command
npx -y x402-trust-mcpPrefer HTTP? Call POST /v1/x402-trust directly (pay-per-call over x402, from $0.005).