Basecamp is a project management platform from 37Signals. Pay4Bugs clients can integrate their Pay4Bugs projects with Basecamp by entering their Basecamp API Token.
To find your token, login to your Basecamp account, then click on "My Info" on the top right hand corner. Scroll down past the contact information to a box labeled "Authentication tokens." Click on the "Show your tokens" link and grab your unique API Token, which permits Pay4Bugs to send bug reports directly to your project t0-do list.