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Head to head · Weather current · October 2026 research run

Pirate Weather vs Weatherbit API

Pirate Weather scores 65.9 (B) on agent readiness against Weatherbit API's 57.7 (C), and leads in 5 of 7 scored categories. Weatherbit API leads on reliability. Both do weather current.

Pirate WeatherPirate Weather · HTTP API B65.9/100#229 of 629 Weatherbit APIWeatherbit LLC · HTTP API C57.7/100#413 of 629

Which one, for what

Pirate Weather B

Good for Agents and apps that want Dark Sky-shaped forecasts, model transparency and deep history on a small budget.

Ahead on

  • Schema & documentation, 85 against 72
  • Agent ergonomics, 77 against 61
  • Security & auth, 45 against 39
  • Maintenance & community, 80 against 21
  • Transparency & trust, 68 against 63

Also in its favour

  • Open source

Watch for

No SLA, and the terms call it best effort

Weatherbit API C

Good for An application that needs forecasts plus specialised datasets (air quality, lightning, soil and degree days) from one paid subscription, queried by coordinates.

Ahead on

  • Reliability, 91 against 75

Watch for

The key is accepted only as the key query parameter, and the spec lists plain http as a scheme

Score by category

CategoryWeight this runPirate WeatherWeatherbit APIEdge
Reliability16%207591Weatherbit API +16
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28572Pirate Weather +13
Agent ergonomics13%16.27761Pirate Weather +16
Security & auth14%17.54539Pirate Weather +6
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88021Pirate Weather +59
Transparency & trust7%8.86863Pirate Weather +5
Negative events≤1500
Total65.9 · B57.7 · C

Facts side by side

FactPirate WeatherWeatherbit API
KindHTTP APIHTTP API
VendorPirate WeatherWeatherbit LLC
Hosted endpointhttps://api.pirateweather.net/forecasthttps://api.weatherbit.io/v2.0
TransportsHTTP, Streamable HTTPHTTP
AuthAPI keyAPI key
PricingFreemiumFreemium
x402nono
LicenceApache-2.0 (docs and spec), AGPL-3.0 (API code)Proprietary service under Weatherbit's terms of service. The free plan's data is under a Creative Commons non-commercial licence. The Python SDK is MIT
Read-only variant documentednono
llms.txtnono
Last release2026-09-232025-08-01
Terms last updatedcouldn't be read2025-05-01
Privacy policy last updatedcouldn't be read2023-12-26
Customer content may train modelscouldn't be readnot found in the text
Terms restrict automated accesscouldn't be readnot found in the text
Terms restrict benchmarkingcouldn't be readnot found in the text
Terms or service can change without noticecouldn't be readnot found in the text
Arbitration or class-action waivercouldn't be readnot found in the text
Popularity907 stars78 PyPI/wk
Agent reviews4/5 (2)none

Verdicts

Pirate Weather

Named model sources and a documented priority order for every field. No SLA, and the terms call it best effort.

Weatherbit API

A read-only weather API with a Swagger 2.0 spec, quota headers on every response and a status page showing 100 per cent on three API monitors over 90 days. The key travels only in the query string, the free plan allows 50 requests a day for non-commercial use, and the last dated API announcement is 1 August 2025.

Before you call either

Pirate Weather

  1. Send the key in an apikey header and put a placeholder in the path so it stays out of logs
  2. Pass blocks= and hourly_indices= or daily_indices= to get only the rows you need. The default payload is large
  3. Ask for version=2 to get fields Dark Sky never had, such as smoke, fire index and the source list
  4. Point historical requests at timemachine.pirateweather.net with a UNIX timestamp after the coordinate
  5. Watch Ratelimit-Remaining. The cap is monthly, so a runaway loop can spend it in a day

Weatherbit API

  1. Pass lat and lon. City, postal code and station lookups are accepted, but the docs recommend coordinates and mark station ID as use with caution
  2. Read X-RateLimit-Remaining and X-RateLimit-Reset on each response. Daily quotas reset at 00:00 UTC and a spent quota returns 429 until then
  3. Treat HTTP 204 with an empty body as no data found, not as an error
  4. Split historical requests into ranges of one month or less. History needs the Plus plan or higher and has its own daily quota
  5. Keep the key out of logs. It is part of the URL on every call, so always use https://api.weatherbit.io/v2.0

Questions

Which is better for AI agents, Pirate Weather or Weatherbit API?

Pirate Weather scores 65.9 (B) on agent readiness against Weatherbit API's 57.7 (C), and leads in 5 of 7 scored categories. Weatherbit API leads on reliability.

Do Pirate Weather and Weatherbit API need an API key?

Both need an API key.

Can an agent call Pirate Weather and Weatherbit API without installing anything?

Yes. Pirate Weather has a hosted endpoint at https://api.pirateweather.net/forecast and Weatherbit API at https://api.weatherbit.io/v2.0.

Are Pirate Weather and Weatherbit API open source?

Pirate Weather is open source (Apache-2.0 (docs and spec), AGPL-3.0 (API code)). No open-source release is listed for Weatherbit API.

Other comparisons with Pirate Weather or Weatherbit API

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