jwt-inspector Connector for AI agents.
1 live capability
Decode and inspect authentication tokens securely without using public web capabilities.
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Why people use jwt-inspector
Deterministic JWT Inspector for Secure Authentication Debugging
This Connector cuts out the middleman. You just give the token to your agent, and it tells you exactly what's inside. You get the data you need in seconds without ever leaving your secure environment.
What Vinkius changes
You get instant, secure token insights without ever exposing your data to a public website.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 6,100+ Connectors
- Real-world use case 01
Debugging 403 Forbidden errors
A developer asks the agent why a user can't access a page.
- Real-world use case 02
Verifying token expiration
An engineer is unsure why an API request is failing.
- Real-world use case 03
Audit header algorithms
A security researcher wants to see what encryption is being used.
Complete set · 1capability
The complete jwt-inspector capability set.
These are the exact actions your AI can choose when you ask it to work with jwt-inspector.
01
1 capability in this set.
Part of 1 available through jwt-inspector.
- 01 Capability
Inspect jwt
Decodes a JWT to show its header and payload. It also calculates if the token is currently expired.
Set up in minutes
One URL. Then ask jwt-inspector to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use jwt-inspector from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it jwt-inspector, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable jwt-inspector for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the jwt-inspector URL.
- Step 03
Save and start
Save the connection and enable jwt-inspector in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"deterministic-jwt-inspector": {
"url": "https://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp"
}
}
}- Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using jwt-inspector
Open Agent mode in chat and ask: "Using jwt-inspector, help me...". 1 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"deterministic-jwt-inspector": {
"url": "https://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp"
}
}
}- Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using jwt-inspector
Ask Copilot: "Using jwt-inspector, help me...". 1 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"deterministic-jwt-inspector": {
"url": "https://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp"
}
}
}- Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using jwt-inspector
Open Cascade and ask: "Using jwt-inspector, help me...". 1 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"deterministic-jwt-inspector": {
"url": "https://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp"
}
}
}- Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using jwt-inspector
Ask Cline: "Using jwt-inspector, help me...". 1 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add deterministic-jwt-inspector --transport http "https://edge.vinkius.com/vk_preview_RsYg5zWS4FmqwKKg6ipnjA8RXRYXPnnOtriCNwkH/mcp"- Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using jwt-inspector
Ask Claude: "Using jwt-inspector, show me...". 1 tools are ready
Where the request belongs
Work jwt-inspector can move forward.
This is for backend engineers and security researchers who handle authentication flows and need to verify token contents without risking data leaks.
Backend Engineer
Debugging why a specific user can't access a route by checking their token claims on a Tuesday afternoon.
Security Auditor
Reviewing the structure of various auth tokens to ensure they follow company standards during a security sweep.
Frontend Developer
Checking the payload of a login response to see what user data is being sent to the UI for display.
Build the capability set
Add more capabilities.
Each Connector adds new actions and data without changing how you work.
Browse Connectors
JWT Payload Extractor
Extract and decode JWT payloads deterministically without cryptographic verification.
JWT Decoder & Verifier
Decode and mathematically verify JWT tokens local. Ensure API authentication tokens are cryptographically authentic and not expired.
JWT & Base64 Decoder
Stop hallucinating Base64 translations. Instantly decode complex JWT tokens into readable headers and payloads with exact expiration mathematics.
JWT Claims Validator
Validate JWT structure and expiration claims without signature verification.
JWT Decoder & Validator
Decode JWT segments and verify cryptographic signatures and temporal claims.
Levo.ai (API Security & Observability)
Secure your APIs via Levo.ai. audit endpoints, monitor sensitive data (PII/PHI), and manage OWASP vulnerabilities.
Bring your own AI
Change the model, client or framework. Keep jwt-inspector connected.
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Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
Windsurf -
ZCode -
Cline -
Zed -
Continue -
Kiro -
Roo Code -
Zencoder -
Goose -
Void -
Augment Code -
Amp -
Qodo -
Tabnine -
Pieces -
Sourcegraph Cody -
JetBrains -
Warp -
Amazon Q -
Antigravity -
BoltAI -
Raycast -
Jan -
LM Studio -
AnythingLLM -
Open WebUI -
Msty -
Cherry Studio -
LibreChat -
TypingMind -
Chorus -
5ire -
n8n -
LangChain -
LlamaIndex -
CrewAI -
Vercel AI SDK
Before you connect
Questions about jwt-inspector.
The practical details behind the request, access and result.
Can I use Deterministic JWT Inspector to see my user roles?
Yes, it extracts all claims from the payload so you can see roles immediately.
Is it safe to use Deterministic JWT Inspector with production tokens?
It's much safer than public sites because it stays in your local environment.
Does Deterministic JWT Inspector need my private keys?
No, it only decodes the data, so you don't need any keys to see the payload.
How does Deterministic JWT Inspector handle expired tokens?
It calculates the expiry based on the current time and tells you if it's dead.
Can Deterministic JWT Inspector decode different types of tokens?
It works on any standard JSON Web Token regardless of the encryption used.
Does this capability verify the JWT signature for authentication?
No. The JWT Inspector is strictly a structural diagnostic capability. It bypasses signature verification to allow the AI to inspect payloads and headers during development and debugging workflows. It should not be used as a backend authentication gate.
Is it secure to decode tokens this way?
Extremely secure. Instead of pasting your token into a third-party website, the decoding happens entirely within the deterministic V8 engine of your local agent runtime, ensuring zero data leakage.
Can it tell me if a token has expired?
Yes. The engine automatically parses the exp (expiration) and iat (issued at) claims, converting them from UNIX timestamps into human-readable ISO dates and returning a boolean flag indicating if it is expired.
One connection away
Give your agent a direct line to jwt-inspector.
Connect jwt-inspector once. Keep it beside 6,100+ managed Connectors when the next task needs more.
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