DIYcity has posted:

WMATA just announced the availability of its schedule and route information on its website:
http://www.wmata.com/rider_tools/developer_resources.cfm

The Metro webite explains on a page called Developer Resources:

Metro has resources available for developers to build their own mobile apps. Download our official schedule data in the open Google Transit Feed Specification (GTFS) or get service advisories, news releases, and more in the universal RSS format. The schedule data provided is the same data that supports Metro’s online trip planner.

Just agree to our terms of usage and you’ll be on your way. Subscribe to our RSS feed so you can stay up-to-date with our schedule changes. As more resources are made available they will be announced here.