# Tomorrow.io Weather API vs Xweather Weather API (slim)

> Xweather Weather API scores 67.1 (B) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in every scored category. Both do weather current. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/tomorrow-io-vs-xweather.md (~2,750 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/tomorrow-io-vs-xweather.json · canonical https://www.anchorterminal.com/compare/tomorrow-io-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 Tomorrow.io Weather API's 51.4 (D), and leads in every scored category. Both do weather current.

- Tomorrow.io Weather API: D 51.4, rank #578 of 722 · https://www.anchorterminal.com/tools/tomorrow-io.min.md
- Xweather Weather API: B 67.1, rank #219 of 722 · https://www.anchorterminal.com/tools/xweather.min.md
- Tomorrow.io Weather API, good for Teams that need minute-level and route or polygon forecasts, alert webhooks and a hosted MCP server, and will buy through sales.
- 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 55; Schema & documentation, 83 against 75; Agent ergonomics, 78 against 73; Security & auth, 52 against 34; Payments & pricing, 32 against 20; Maintenance & community, 81 against 27; Transparency & trust, 68 against 63.

| Category | Tomorrow.io Weather API | Xweather Weather API |
| --- | --- | --- |
| Reliability (16%) | 55 | 74 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 75 | 83 |
| Agent ergonomics (13%) | 73 | 78 |
| Security & auth (14%) | 34 | 52 |
| Payments & pricing (10%) | 20 | 32 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 27 | 81 |
| Transparency & trust (7%) | 63 | 68 |

| Fact (where they differ) | Tomorrow.io Weather API | Xweather Weather API |
| --- | --- | --- |
| Vendor | The Tomorrow Companies Inc. | Vaisala Oyj |
| Hosted endpoint | `https://api.tomorrow.io/v4` | `https://data.api.xweather.com` |
| Licence | Proprietary service under Tomorrow.io's subscription terms | 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 | 11 | 19 |
| MCP registry | not listed | `com.xweather/weather` |
| Last release | 2026-07-14 | 2026-09-14 |
| Privacy policy last updated | couldn't be read | 2020-06-01 |
| Popularity | none | 0 stars, 1.4k npm/wk |