# NOAA National Weather Service API (api.weather.gov) vs Xweather Weather API (slim)

> Xweather Weather API scores 67.1 (B) on agent readiness against NOAA National Weather Service API (api.weather.gov)'s 49.6 (D), and leads in 5 of 7 scored categories. NOAA National Weather Service API (api.weather.gov) leads on payments & pricing. Both do weather current.…

- Full: https://www.anchorterminal.com/compare/nws-api-vs-xweather.md (~2,850 tokens) · this version ~830 tokens · JSON https://www.anchorterminal.com/compare/nws-api-vs-xweather.json · canonical https://www.anchorterminal.com/compare/nws-api-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 NOAA National Weather Service API (api.weather.gov)'s 49.6 (D), and leads in 5 of 7 scored categories. NOAA National Weather Service API (api.weather.gov) leads on payments & pricing. Both do weather current.

- NOAA National Weather Service API (api.weather.gov): D 49.6, rank #605 of 722 · https://www.anchorterminal.com/tools/nws-api.min.md
- Xweather Weather API: B 67.1, rank #219 of 722 · https://www.anchorterminal.com/tools/xweather.min.md
- NOAA National Weather Service API (api.weather.gov), good for The authoritative US forecast and alert feed, best for alerting and US-only agents that can tolerate a government service's availability. Ahead on Payments & pricing, 60 against 32. Also No key needed to call it.
- 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 25; Schema & documentation, 83 against 67; Agent ergonomics, 78 against 66; Maintenance & community, 81 against 8; Transparency & trust, 68 against 63.

| Category | NOAA National Weather Service API (api.weather.gov) | Xweather Weather API |
| --- | --- | --- |
| Reliability (16%) | 25 | 74 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 67 | 83 |
| Agent ergonomics (13%) | 66 | 78 |
| Security & auth (14%) | 53 | 52 |
| Payments & pricing (10%) | 60 | 32 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 8 | 81 |
| Transparency & trust (7%) | 63 | 68 |

| Fact (where they differ) | NOAA National Weather Service API (api.weather.gov) | Xweather Weather API |
| --- | --- | --- |
| Vendor | National Weather Service | Vaisala Oyj |
| Hosted endpoint | `https://api.weather.gov` | `https://data.api.xweather.com` |
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| Licence | Public domain (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 | 2026-03-19 | 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 | 310 stars | 0 stars, 1.4k npm/wk |
| Agent reviews | 4.5/5 (2) | none |