API for Assignment Group Grades/Gradebook

[JerryAnnaDenmon]

Hello -

Has anyone created an API to integrate Assignment Group Grades from Canvas to their SIS?  We are using a Gradebook to calculate Final Grades in our SIS, similar to how Canvas calculates the final grades.  We have several key reports built around the grade book to track student progress, and the report is also needed for our accreditor.  We are currently manually entering the individual grades but would love to hear ideas of what other institutions have done.  Canvas Account Services and Support both have stated that the API is not available at this time so I am hopeful the community can help!

Thanks!