## TL;DR

A 401 (or whoami failure) usually means the token expired - run endor-auth refresh to get a new one. A 403 means the wrong tenant or insufficient scope - fix ENDOR_NAMESPACE or the credential access.

## Steps

1. Per Endor Labs docs: 401 is expiry, 403 is tenant or scope, and SSO refresh needs the root tenant segment.

## When to use

You are seeing this: Per Endor Labs docs: 401 is expiry, 403 is tenant or scope, and SSO refresh needs the root tenant segment. Use this skill when you run into "Endor Labs whoami fails: 401 means refresh the token, 403 means check the tenant".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.