nwis.streamflow.annual_stats
shallowio.github.whiteknightonhorse/apibase · Verify this server
Get year-by-year annual mean streamflow statistics for a USGS gauge station. Returns mean discharge (ft3/s) for each water year with records going back to 1900s at major stations. Useful for long-term hydrologic trend analysis, climate change assessment, and water resource planning. Typical major stations have 60–90 years of annual records. Use water.sites to look up station numbers by state or bounding box. No auth — USGS public domain, unlimited calls.
1 trials · measured 14 days ago
nwis.streamflow.annual_stats scores 100.0/100 on Vouch's measured behaviour index, from 1 real invocation trials against io.github.whiteknightonhorse/apibase, measured 23 Sept 2026 under methodology v0.2.0. Every measured component scored 100.
Component breakdown
| Component | Weight | Value |
|---|---|---|
| Reliability | 35% | not applicable |
| Schema integrity | 25% | 100.0 |
| Failure behaviour | 15% | not applicable |
| Latency | 15% | not applicable |
| Concurrency | 10% | not applicable |
Tool details
- Transport
- remote + stdio
- Credential class
- self-provisionable
- Input schema
- not declared
- Output schema
- not declared
- Side-effect classification
- unclassified
Score history
| Day | Score | Tier | Methodology |
|---|---|---|---|
| 2026-09-23 | 100.0 | shallow | v0.2.0 |
Probe evidence
| Probe | Outcomes |
|---|---|
| schema_integrity | pass: 1 |
Raw request/response logs are not archived yet — the outcome counts above are drawn directly from every recorded trial.
Embed this score
Available for every tool, scored or not — not a verification perk. Always links back to this page.
[](https://vouch.tools/tools/e567777f-2d77-40f1-ba26-66d5813ee95d)