rally-sample-app is released under the MIT license. See the file LICENSE for the full text.
You can find the documentation on our help site.
https://rally1.rallydev.com/docs/en-us/saas/apps/2.1/doc/index.html#!/guide/developing_externally
https://rally1.rallydev.com/docs/en-us/saas/apps/2.1/doc/index.html#!/guide/lookback_api