> For the complete documentation index, see [llms.txt](https://rest-api.symphony.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rest-api.symphony.com/main/groups-distribution-lists.md).

# Groups - Distribution Lists

- [OAuth2 Authenticate](https://rest-api.symphony.com/main/groups-distribution-lists/oauth2-authenticate.md): Authenticates the API caller on the Symphony servers (pod) using a Session token, and returns a valid OAuth2 access token.
- [Add a new user to an existing group](https://rest-api.symphony.com/main/groups-distribution-lists/addmembertogroup.md)
- [Insert a new group](https://rest-api.symphony.com/main/groups-distribution-lists/insertgroup.md)
- [Retrieve a group](https://rest-api.symphony.com/main/groups-distribution-lists/getgroup.md)
- [Update a group](https://rest-api.symphony.com/main/groups-distribution-lists/updategroup.md)
- [List all groups of specified type](https://rest-api.symphony.com/main/groups-distribution-lists/listgroups.md)
- [Update the group avatar](https://rest-api.symphony.com/main/groups-distribution-lists/updateavatar.md)