GitHub is managed through the Claude GitHub App rather than a connection in this list; see Configure GitHub access.
Services marked (custom) have no preset button. Add them with Connect another tool following their guide.
The presets and guides cover common services, not the full set Claude can connect to. Any app with an API can be added as a custom connection or a custom MCP server. See Connect a custom service for the credential types and form fields.
When a connection fails after setup
If Claude says it can’t reach a service you connected, start with the checks at the top of Troubleshoot Claude Tag setup. Confirm the connection is in a bundle attached to the channel’s scope, and rerun the test in a new thread, since a session loads its connections when it starts. Two entries on the troubleshooting page cover connection failures directly:- A connection works in one channel but not another: bundles attach per scope, so the failing channel’s scope is likely missing the bundle
- I hit an authentication error and couldn’t finish this turn: Claude posts that message when its own request fails an authentication check. A connected service’s failing credential surfaces as a tool error inside Claude’s reply instead