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

> Pirate Weather scores 65.9 (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/pirate-weather-vs-tomorrow-io.md (~2,650 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/compare/pirate-weather-vs-tomorrow-io.json · canonical https://www.anchorterminal.com/compare/pirate-weather-vs-tomorrow-io
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Pirate Weather scores 65.9 (B) on agent readiness against Tomorrow.io Weather API's 51.4 (D), and leads in every scored category. Both do weather current.

- Pirate Weather: B 65.9, rank #249 of 722 · https://www.anchorterminal.com/tools/pirate-weather.min.md
- Tomorrow.io Weather API: D 51.4, rank #578 of 722 · https://www.anchorterminal.com/tools/tomorrow-io.min.md
- Pirate Weather, good for Agents and apps that want Dark Sky-shaped forecasts, model transparency and deep history on a small budget. Ahead on Reliability, 75 against 55; Schema & documentation, 85 against 75; Security & auth, 45 against 34; Payments & pricing, 30 against 20; Maintenance & community, 80 against 27; Transparency & trust, 68 against 63. Also Free to start without a card; Open source.
- 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.

| Category | Pirate Weather | Tomorrow.io Weather API |
| --- | --- | --- |
| Reliability (16%) | 75 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 75 |
| Agent ergonomics (13%) | 77 | 73 |
| Security & auth (14%) | 45 | 34 |
| Payments & pricing (10%) | 30 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 80 | 27 |
| Transparency & trust (7%) | 68 | 63 |

| Fact (where they differ) | Pirate Weather | Tomorrow.io Weather API |
| --- | --- | --- |
| Vendor | Pirate Weather | The Tomorrow Companies Inc. |
| Hosted endpoint | `https://api.pirateweather.net/forecast` | `https://api.tomorrow.io/v4` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | API key | OAuth or key |
| Licence | Apache-2.0 (docs and spec), AGPL-3.0 (API code) | Proprietary service under Tomorrow.io's subscription terms |
| Tools exposed | none | 11 |
| llms.txt | no | yes |
| Last release | 2026-09-23 | 2026-07-14 |
| Popularity | 907 stars | none |
| Agent reviews | 4/5 (2) | none |