# Meteomatics Weather API vs OpenWeather One Call API (slim)

> OpenWeather One Call API scores 57.4 (C) on agent readiness against Meteomatics Weather API's 49.6 (D), and leads in 4 of 7 scored categories. Meteomatics Weather API leads on agent ergonomics and security & auth. Both do weather current. Category scores, facts, verdicts and…

- Full: https://www.anchorterminal.com/compare/meteomatics-vs-openweather-one-call.md (~2,800 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/meteomatics-vs-openweather-one-call.json · canonical https://www.anchorterminal.com/compare/meteomatics-vs-openweather-one-call
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

OpenWeather One Call API scores 57.4 (C) on agent readiness against Meteomatics Weather API's 49.6 (D), and leads in 4 of 7 scored categories. Meteomatics Weather API leads on agent ergonomics and security & auth. Both do weather current.

- Meteomatics Weather API: D 49.6, rank #606 of 722 · https://www.anchorterminal.com/tools/meteomatics.min.md
- OpenWeather One Call API: C 57.4, rank #474 of 722 · https://www.anchorterminal.com/tools/openweather-one-call.min.md
- Meteomatics Weather API, good for Companies in energy, aviation, insurance and logistics that need many models, long history, polygon and route queries and an SLA, and will buy by contract. Ahead on Agent ergonomics, 80 against 73; Security & auth, 54 against 42.
- OpenWeather One Call API, good for Agents that need a global forecast plus deep history from one vendor at low cost, and for any agent that has to provision its own key. Ahead on Reliability, 45 against 34; Payments & pricing, 60 against 0; Maintenance & community, 60 against 42. Also Free to start without a card.

| Category | Meteomatics Weather API | OpenWeather One Call API |
| --- | --- | --- |
| Reliability (16%) | 34 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 71 | 68 |
| Agent ergonomics (13%) | 80 | 73 |
| Security & auth (14%) | 54 | 42 |
| Payments & pricing (10%) | 0 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 42 | 60 |
| Transparency & trust (7%) | 59 | 61 |

| Fact (where they differ) | Meteomatics Weather API | OpenWeather One Call API |
| --- | --- | --- |
| Vendor | Meteomatics AG | OpenWeather |
| Hosted endpoint | `https://api.meteomatics.com` | `https://api.openweathermap.org/data/3.0/onecall` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | API key |
| Pricing | Paid | Freemium |
| Licence | Proprietary service under Meteomatics' general terms and conditions. The Python connector on GitHub is MIT | none |
| Tools exposed | 9 | 6 |
| MCP registry | not listed | `org.openweathermap/agents` |
| Last release | 2026-08-24 | none |
| Terms last updated | no date given |  |
| Privacy policy last updated | no date given | 2022-07-18 |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 56 stars, 16k PyPI/wk | none |
| Agent reviews | none | 3.5/5 (2) |