- EXPIRED
- VALID
- FUTURE
- HUMAN
Short answer
How can I check if my JWT is expired using AI?
Your AI uses the inspect_jwt tool to pull timestamps from the token and compares them to the current UTC time. This tells you if the token is expired, not yet valid, or if the issue is something else. You'll see the specific cause of the auth failure.
The results of the inspection.
Where every issue lands.
The AI categorizes the token status into clear outcomes.
EXPIRED
Token is expired
The AI finds that the expiration time has passed. You'll know you need to refresh your credentials.
VALID
Token is active
The AI confirms the timestamps are within the valid window. This means the problem is likely in your headers or permissions.
FUTURE
Token not yet valid
The AI flags that the token's start time is in the future. This usually points to a clock skew issue.
HUMAN
Manual check required
If the token is malformed, the AI can't read it. You'll need to inspect the raw string yourself.
The workflow
What your AI does when the token arrives.
Your agent handles the decoding and time math so you don't have to.
Decode the JWT
The AI takes your raw string and breaks it into its header, payload, and signature components.
inspect_jwtExtract claims
The agent pulls the specific expiration and issuance timestamps from the payload.
inspect_jwtVerify time
The AI compares those timestamps against the current UTC time to check for validity.
inspect_jwtDiagnose failure
The agent identifies if the failure is due to expiry, clock skew, or a malformed structure.
inspect_jwt
Try it
Copy these to start.
Use these prompts to begin your diagnosis.
Starting points
Swap the bracketed text for your actual JWT or log data.
Deterministic JWT Inspector Connector
You're all set. Choose your MCP client and follow the setup instructions.
https://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp
Claude Desktop
Follow the steps below to connect in seconds.
- 1In Claude Desktop, open Settings → Connectors.
- 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
- 3Click Add and start a new chat — Deterministic JWT Inspector capabilities are ready to use.
{
"mcpServers": {
"deterministic-jwt-inspector-mcp": {
"url": "https://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp"
}
}
}Inspect this JWT and tell me if it's expired: [paste_token_here]
Check the expiration of the token in this log: [paste_log_snippet]
Compare the 'nbf' claim in this token against current UTC: [paste_token_here]
Analyze this JWT payload to find why my auth is failing: [paste_token_here]
- Claude
ChatGPT
Cursor
VS Code
Windsurf- Claude Code
JetBrains
Cline
Start here
Connect Deterministic JWT Inspector once, then ask.
Connect the MCP to your client in one click. Your credentials stay encrypted on our side, and you can start asking questions immediately.
Connect Deterministic JWT Inspector to your AIFAQ
How this task behaves
- 01
Can the AI fix my expired token?
No. The AI only diagnoses the token status. You have to handle the re-authentication yourself.
- 02
Does the AI change the token data?
No. The AI only reads and analyzes the data you provide. It cannot modify or sign tokens.
- 03
Can it check tokens from any source?
Yes. You can paste a token from a browser, a terminal, or a log file directly into the chat.
- 04
What if the token is malformed?
The AI will tell you it can't parse the string. It won't try to fix it or guess the contents.
- 05
Does it check the signature validity?
No. This specific task focuses on analyzing the timestamps within the payload.
More questions about Deterministic JWT Inspector? The Connector page answers them. See everything the Deterministic JWT Inspector Connector can do
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