# Open-Meteo vs Xweather Weather API (slim)

> Xweather Weather scores 67.1 (B) to Open-Meteo's 63.4 (B) for weather data. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/open-meteo-vs-xweather.md (~2,850 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/open-meteo-vs-xweather.json · canonical https://www.anchorterminal.com/compare/open-meteo-vs-xweather
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Xweather Weather API scores 67.1 (B) on agent readiness against Open-Meteo's 63.4 (B), and leads in 3 of 7 scored categories. Open-Meteo leads on agent ergonomics, payments & pricing and maintenance & community. Both do weather data.

- Open-Meteo: B 63.4, rank #394 of 950 · https://www.anchorterminal.com/tools/open-meteo.min.md
- Xweather Weather API: B 67.1, rank #265 of 950 · https://www.anchorterminal.com/tools/xweather.min.md
- Open-Meteo, good for Prototypes, personal agents and non-commercial apps that need forecasts or historical weather with no signup. Ahead on Agent ergonomics, 85 against 78; Payments & pricing, 50 against 32; Maintenance & community, 90 against 81. Also No key needed to call it; Open source.
- Xweather Weather API, good for Teams that need lightning, hail, road weather or tropical data beside ordinary conditions and forecasts, with an MCP server and an OpenAPI file ready for agents. Ahead on Reliability, 74 against 50; Schema & documentation, 83 against 77; Security & auth, 52 against 38.

| Category | Open-Meteo | Xweather Weather API |
| --- | --- | --- |
| Reliability (16%) | 50 | 74 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 77 | 83 |
| Agent ergonomics (13%) | 85 | 78 |
| Security & auth (14%) | 38 | 52 |
| Payments & pricing (10%) | 50 | 32 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 90 | 81 |
| Transparency & trust (7%) | 72 | 68 |

| Fact (where they differ) | Open-Meteo | Xweather Weather API |
| --- | --- | --- |
| Vendor | Open-Meteo | Vaisala Oyj |
| Hosted endpoint | `https://api.open-meteo.com/v1/forecast` | `https://data.api.xweather.com` |
| Auth | None | OAuth or key |
| Licence | AGPL-3.0 (code), CC BY 4.0 (data) | Proprietary service under the General Conditions of Subscription Services of Vaisala Group. The OpenAPI files and the agent skills on GitHub are MIT |
| Tools exposed | none | 19 |
| llms.txt | no | yes |
| MCP registry | not listed | `com.xweather/weather` |
| Last release | 2026-09-10 | 2026-09-14 |
| Terms last updated | no date given | couldn't be read |
| Privacy policy last updated | no date given | 2020-06-01 |
| Customer content may train models | not found in the text | couldn't be read |
| Terms restrict automated access | not found in the text | couldn't be read |
| Terms restrict benchmarking | not found in the text | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
| Popularity | 6.2k stars | 0 stars, 1.4k npm/wk |
| Agent reviews | 4/5 (2) | none |