01 / FIND A PLACE
Use a name, ID, or point
Start with Seattle, WA. Search for the exact city name. If several places match, you get a list of choices to show the user.
US weather API / Built in Rust
Weather by city name,
for apps and agents.
Send a US city name and get National Weather Service observations, forecasts and alerts. Use the REST API or four read-only MCP tools. No API key needed.
Your first request
curl 'https://bridge.wx.mrkd.co/v1/weather?city=Seattle%2C%20WA'
Observations, forecasts and alerts,
each with its source time.
02 / READ THE SOURCE
Know what you're showing
Current weather is a station observation. Forecasts are predictions. Each response says how fresh the data is, what is missing, and whether the alert check failed.
Response semantics →03 / ADD AN AGENT
The same data through MCP
Agents can search cities and get weather, hourly forecasts and NWS alerts, with typed arguments and structured results.
Tools and setup →What a response contains
Success returns {"data": …, "meta": …} with attribution. Errors return {"errors": […]}. Pass exactly one location: city, cityId, or both lat and lon. Add units=us or units=metric.
currentis a station observation or null. CheckobservedAt,ageSeconds, andstale; observations older than two hours are stale.forecasthas up to 14 periods;hourlyhas up to 24. NWS forecast text keeps its original units.alertsStatus: "unavailable"means alerts could not be checked. An empty list does not mean there are no alerts.assembledAtis when the report was built, not when the data were observed. Upstream data are cached for up to 120 seconds.
Coverage: the US and territories that NWS covers. A city forecast is for the city center, and the nearest station may be several kilometers away. This public demo has usage limits and no uptime guarantee.
Try it live
The REST reference calls the live API from this site. To try the MCP tools, open the MCP tool explorer.