WeatherAPI
Weather data API providing current conditions, forecasts up to 14 days, historical data, astronomy, time zone, and sports weather via a clean REST interface.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Single API key. No scope granularity. HTTPS enforced. Weather data is not sensitive. Simple auth model appropriate for use case. Free tier with generous limits.
⚡ Reliability
Best When
You need a generous free tier, clean API design, and richer data than OpenWeatherMap (air quality, sports, astronomy in one API).
Avoid When
You need official government weather data sources or aviation-grade precision.
Use Cases
- • Getting weather forecasts for trip planning agents
- • Retrieving hyperlocal weather with air quality and UV index
- • Historical weather lookups for analytics and ML training data
- • Astronomy data (sunrise/sunset, moon phases) for scheduling agents
- • Weather alerts and severe weather monitoring
Not For
- • Aviation or maritime precision weather
- • Real-time radar imagery
- • Scientific climate research requiring raw station data
Interface
Authentication
Simple API key as query parameter. No scopes or complex auth required.
Pricing
Very generous free tier (1M calls/month). Paid tiers unlock longer forecast windows, history, and higher rate limits.
Agent Metadata
Known Gotchas
- ⚠ Historical data only available back 1 year on free/entry plans; more history requires higher tiers
- ⚠ Location parameter accepts city name, lat/lon, US zip, UK postcode, IP - flexible but must validate format
- ⚠ 14-day forecast requires paid plan - free tier limited to 3 days
- ⚠ Air quality and astronomy endpoints are separate and count toward monthly quota
- ⚠ Response includes both metric and imperial units - agents must specify or parse both
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for WeatherAPI.
Scores are editorial opinions as of 2026-03-06.