It looks like the issue is caused by the dash before host. The command is using an en-dash (–) instead of a regular hyphen (-) — which breaks the URL parsing.

Try running this instead:

databricks auth login --host https://<your-instance>.azuredatabricks.net

(make sure you use two regular hyphens before host)

If you’re testing your OIDC setup or want to validate .well-known endpoints, token responses, or redirect flows, you can use these tools:

• OIDC Debugger – test OIDC authorization code flow

• JWT.io – inspect and verify JWT tokens

• OAuth Playground  – simulate OIDC & OAuth flows

These can help ensure your OIDC configuration and endpoints are working as expected.

Great, these are amazing resources! I'm using them to test my IAM apps and flow.