make auth token configurable via env var

[kentcdodds]

Motivation and Context

I run MCP workshops. To keep exercises isolated and setup easy, I programmatically run the inspector with a bunch of things prefilled via the URL and use environment variables to control things like ports etc. With the session token changes, I now have to parse out the generated session token from the output so I can kick off the inspector with the auth token in the search params.

This is possible, but I don't like parsing output as it could easily change. I would much rather just be responsible for generating the token.

How Has This Been Tested?

I made this change in node_modules locally and it worked great.

Breaking Changes

None

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

[kentcdodds]

I have now published this change under @kentcdodds/[email protected] if anyone wants to try it out.