# OpenWeather One Call API vs WeatherAPI.com (slim)

> WeatherAPI.com has a score of 65.8 (B) against OpenWeather One Call API's 57.4 (C). Both do weather current. The largest gap is reliability, 45 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/openweather-one-call-vs-weatherapi-com.md (~1,600 tokens) · this version ~380 tokens · JSON https://www.anchorterminal.com/compare/openweather-one-call-vs-weatherapi-com.json · canonical https://www.anchorterminal.com/compare/openweather-one-call-vs-weatherapi-com
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

WeatherAPI.com has a score of 65.8 (B) against OpenWeather One Call API's 57.4 (C). Both do weather current. The largest gap is reliability, 45 points.

- OpenWeather One Call API: C 57.4, rank #294 of 452 · https://www.anchorterminal.com/tools/openweather-one-call.min.md
- WeatherAPI.com: B 65.8, rank #169 of 452 · https://www.anchorterminal.com/tools/weatherapi-com.min.md
- Pick OpenWeather One Call API for security & auth (+5), payments & pricing (+30), maintenance & community (+15). Pick WeatherAPI.com for reliability (+45), schema & documentation (+21), agent ergonomics (+7), transparency & trust (+8).

| Category | OpenWeather One Call API | WeatherAPI.com |
| --- | --- | --- |
| Reliability (16%) | 45 | 90 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 68 | 89 |
| Agent ergonomics (13%) | 73 | 80 |
| Security & auth (14%) | 42 | 37 |
| Payments & pricing (10%) | 60 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 60 | 45 |
| Transparency & trust (7%) | 62 | 70 |