Git Providers
Coder Agents leverages your existing
external authentication configuration
to power the in-chat diff viewer and PR Insights.
Self-hosted GitHub Enterprise deployments require one additional setting
(API_BASE_URL) for these features to work.
Note
Only github type external auth providers are supported today.
GitHub Enterprise configuration
For public github.com, no additional configuration is needed.
For self-hosted GitHub Enterprise, add API_BASE_URL to your
existing configuration:
CODER_EXTERNAL_AUTH_0_ID="primary-github"
CODER_EXTERNAL_AUTH_0_TYPE=github
CODER_EXTERNAL_AUTH_0_CLIENT_ID=xxxxxx
CODER_EXTERNAL_AUTH_0_CLIENT_SECRET=xxxxxxx
CODER_EXTERNAL_AUTH_0_AUTH_URL="https://github.example.com/login/oauth/authorize"
CODER_EXTERNAL_AUTH_0_TOKEN_URL="https://github.example.com/login/oauth/access_token"
CODER_EXTERNAL_AUTH_0_VALIDATE_URL="https://github.example.com/api/v3/user"
CODER_EXTERNAL_AUTH_0_API_BASE_URL="https://github.example.com/api/v3"
CODER_EXTERNAL_AUTH_0_REGEX=github\.example\.com
Without API_BASE_URL, Coder defaults to https://api.github.com. Clone
and push still work (they use AUTH_URL and TOKEN_URL directly), but
the diff viewer and PR Insights silently fail because Coder builds its
URL-matching patterns from the API base URL.
Note
If you have both a github.com and a GHE external auth config, only the
GHE config needs API_BASE_URL.
Troubleshooting
Diffs or PR data not appearing on GHE
Add API_BASE_URL to your GHE external auth config and restart Coder.
Data should appear within a couple of minutes.
Users not seeing diffs
The chat owner must have linked their account through the relevant external auth provider.
Checking logs
Look for gitsync warnings such as no provider for origin or
resolve token errors.