high severity

How to Fix: 401 Unauthorized Error

Your API returns 401 Unauthorized, meaning the server doesn't recognize your credentials or your token has expired.

401 unauthorizedapi authentication errorbearer token invalidjwt expired

Symptoms

API returns 401 status code

User gets logged out unexpectedly

'Invalid token' or 'Token expired' messages

Common Causes

01

JWT token has expired

02

Missing or malformed Authorization header

03

Token was revoked or invalidated

04

Wrong environment credentials

The DevConsole Solution

DevConsole lets you inspect, decode, and replace JWT tokens instantly. See exactly what's in your token and inject valid test credentials.

Step-by-Step Fix

1

Open Auth Tab

DevConsole shows your current session state and tokens.

2

Decode the JWT

Click on any token to see its decoded payload and expiry time.

3

Inject Test Token

Use a fresh token or test credentials to verify the endpoint works.

Frequently Asked Questions

How do I know if my token is expired?

DevConsole's JWT decoder shows the 'exp' claim and highlights if it's in the past.

Can I test with different user roles?

Yes! DevConsole's user presets let you switch between 'admin', 'user', 'guest' etc. instantly.

Stop debugging blindly

DevConsole gives you the visibility and control to fix issues like 401 unauthorized error in seconds, not hours.

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