docs/data/reusables/rest-reference/collaborators/invitations.md

Invitations

The Repository Invitations API allows users or external services to invite other users to collaborate on a repo. The invited users (or external services on behalf of invited users) can choose to accept or decline the invitations.

Note that the repo:invite OAuth scope grants targeted access to invitations without also granting access to repository code, while the repo scope grants permission to code as well as invitations.

Invite a user to a repository

Use the API endpoint for adding a collaborator. For more information, see "Add a repository collaborator."