Science & Math · head-to-head
isEven (humor) vs USGS Water Services
isEven is a parody of the infamous is-even npm-package controversy, wrapped as a keyless REST endpoint that answers whether a given number is even. The free tier's JSON response bundles in a joke classified ad alongside the boolean result; a paid Premium/Enterprise tier removes the ads.
USGS Water Services is a keyless REST API serving real-time and historical streamflow, groundwater, and water-quality readings from thousands of USGS monitoring sites across the US, in WaterML XML, JSON, or the legacy tab-delimited RDB format. The agency has announced it will decommission this API family in early 2027 in favor of its new Water Data APIs (api.waterdata.usgs.gov), with no degradation planned before August 2026 — new integrations should target the successor service.
| isEven (humor) | USGS Water Services | |
|---|---|---|
| Authentication | None | None |
| Pricing | freemium | free |
| Formats | JSON | JSON, XML, RDB |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
USGS Water Services supports 3 response formats, while isEven (humor) offers fewer — pick USGS Water Services for more integration flexibility.