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Head to head · Weather current · October 2026 research run

OpenWeather One Call API vs Weatherbit API

Weatherbit API and OpenWeather One Call API score within a point of each other on agent readiness, 57.7 (C) and 57.4 (C). OpenWeather One Call API leads on agent ergonomics, payments & pricing and maintenance & community. Both do weather current.

OpenWeather One Call APIOpenWeather · HTTP API C57.4/100#421 of 629 Weatherbit APIWeatherbit LLC · HTTP API C57.7/100#413 of 629

Which one, for what

OpenWeather One Call API C

Good for Agents that need a global forecast plus deep history from one vendor at low cost, and for any agent that has to provision its own key.

Ahead on

  • Agent ergonomics, 73 against 61
  • Payments & pricing, 60 against 30
  • Maintenance & community, 60 against 21

Watch for

The main API takes the key only as the appid query parameter

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 45

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 runOpenWeather One Call APIWeatherbit APIEdge
Reliability16%204591Weatherbit API +46
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26872Weatherbit API +4
Agent ergonomics13%16.27361OpenWeather One Call API +12
Security & auth14%17.54239OpenWeather One Call API +3
Payments & pricing10%12.56030OpenWeather One Call API +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86021OpenWeather One Call API +39
Transparency & trust7%8.86163Weatherbit API +2
Negative events≤1500
Total57.4 · C57.7 · C

Facts side by side

FactOpenWeather One Call APIWeatherbit API
KindHTTP APIHTTP API
VendorOpenWeatherWeatherbit LLC
Hosted endpointhttps://api.openweathermap.org/data/3.0/onecallhttps://api.weatherbit.io/v2.0
TransportsHTTP, Streamable HTTPHTTP
AuthAPI keyAPI key
PricingFreemiumFreemium
x402nono
LicencenoneProprietary 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
Tools exposed6none
Read-only variant documentednono
llms.txtyesno
MCP registryorg.openweathermap/agentsnot listed
Last releasenone2025-08-01
Terms last updated2025-05-01
Privacy policy last updated2022-07-182023-12-26
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularitynone78 PyPI/wk
Agent reviews3.5/5 (2)none

Verdicts

OpenWeather One Call API

1,000 free calls a day, then $0.0015 a call, or $0.001 on the agent lane. The main API takes the key only as the appid query parameter.

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

OpenWeather One Call API

  1. Sign up on the agent lane with POST https://agents.openweathermap.org/v1/accounts and keep the data key. It's shown once
  2. Check GET https://data.openweathermap.org/account/balance for credit. No data response carries a cost or balance
  3. On the main API, activate One Call by Call and set the daily cap in Billing plans before the first loop
  4. Pass units=metric. The default is Kelvin
  5. Use exclude=minutely,alerts on 3.0, or the 4.0 timeline step you need, to shrink responses

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, OpenWeather One Call API or Weatherbit API?

Weatherbit API and OpenWeather One Call API score within a point of each other on agent readiness, 57.7 (C) and 57.4 (C). OpenWeather One Call API leads on agent ergonomics, payments & pricing and maintenance & community.

Do OpenWeather One Call API and Weatherbit API need an API key?

Both need an API key.

Can an agent call OpenWeather One Call API and Weatherbit API without installing anything?

Yes. OpenWeather One Call API has a hosted endpoint at https://api.openweathermap.org/data/3.0/onecall and Weatherbit API at https://api.weatherbit.io/v2.0.

Other comparisons with OpenWeather One Call API or Weatherbit API

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