OpenWeatherMap MCP Server
Official OpenWeatherMap MCP server enabling AI agents to access weather data — current conditions, forecasts, historical data, air quality, and weather alerts for any location worldwide.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
HTTPS enforced. API key in query parameter is a security antipattern but low-risk for weather data. No compliance certs needed for public weather data.
⚡ Reliability
Best When
An agent needs current or forecast weather data for any location — planning, logistics, outdoor activities, or environmental context.
Avoid When
You need aviation-grade or ultra-precise meteorological data.
Use Cases
- • Getting current weather conditions for location-aware agent decisions
- • Fetching weather forecasts for logistics and planning agents
- • Accessing historical weather data for analysis agents
- • Checking air quality and UV index for health-aware agents
- • Weather-based automation triggering in agent workflows
Not For
- • Ultra-precise meteorological data (use specialized weather services)
- • Aviation weather (use weather.gov/NOAA for METAR data)
- • Real-time severe weather alerting systems
Interface
Authentication
Single API key via OWM_API_KEY. No scope granularity. API key is appended to requests as a query parameter.
Pricing
Very generous free tier for most agent use cases. Paid tiers add historical data, minute forecasts, alerts.
Agent Metadata
Known Gotchas
- ⚠ API key is passed as query parameter — can be logged in access logs
- ⚠ OneCall API 3.0 requires subscription even for basic usage — check your plan
- ⚠ Weather data accuracy varies by location — rural areas have fewer stations
- ⚠ Forecast APIs use different endpoints than current weather
- ⚠ City search by name is imprecise — use latitude/longitude for accuracy
- ⚠ API v2.5 vs v3.0 have different features and pricing
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for OpenWeatherMap MCP Server.
Scores are editorial opinions as of 2026-03-06.