Welcome to WMATA Developer Portal

The collection of data offered here allows developers to create new and innovative applications for the web or mobile devices. We encourage you to integrate Metro data into your applications and mashups to help get people the information they want about getting around. Use of our APIs and other data is free of charge, you have two options, for new developers who want to try out the WMATA API but are not ready for production, and you can use our demonstration key, without having to register.The demonstration key is available on our API Explorer page.

If you want to use the WMATA API for a production App, we ask Developers to register with us to receive a development key and agree to the guidelines outlined in our Developer License Agreement.

By either using our demonstration key or after you register, our open data will be yours to creatively show off your passion for programming and Metro to make something great!

2014-08-06 - Yesterday we became aware of an issue with a deployment we did on Monday. It involved our Station Prediction service XML response. We fixed it as soon as we heard about it. We apologize for any hassles this caused you. We appreciate it when you let us know about a problem. Use our contact form or email us at api-support@wmata.com.

2014-07-18 - We are happy to announce the release of Silver Line data. All rail-related methods (Rail Lines, Stations, Station Info, Paths, Predictions, Entrances, Incidents, and Elevator Incidents) will return information on Silver Line components, when applicable. Please refer to the documentation for details on each method.