JWT Payload Extractor Connector for AI agents.

Q: Do I need to provide my private keys to JWT Payload Extractor?

No, you only need the encoded JWT string itself. The tool decodes the payload without needing any secret keys.

3 live capabilities

Decode and inspect JSON Web Token payloads instantly.

Live agent request JWT Payload Extractor / Connector

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AI Agent

Why people use JWT Payload Extractor

JWT Payload Extractor for debugging authentication tokens

With this MCP, you just point your agent at the token. It handles the decoding and normalization instantly, giving you the exact claims you're looking for without leaving your workspace.

What Vinkius changes

You get instant visibility into token contents without needing cryptographic keys.

Use it from Claude, ChatGPT, Cursor or another AI client you already have.

One account · 5,900+ Connectors

Real-world use case 01

Debugging expired sessions

A developer sees a 401 error and asks their agent if the token is still valid using check_token_expiry.
Real-world use case 02

Verifying user permissions

An engineer needs to confirm a 'role' claim is present in a new auth flow by using decode_jwt_payload.
Real-world use case 03

Automating identity checks

A tester uses extract_token_identity to ensure the correct subject ID is being passed in a test suite.

Complete set · 3capabilities

The complete JWT Payload Extractor capability set.

These are the exact actions your AI can choose when you ask it to work with JWT Payload Extractor.

Capability set01 / 01

01—03

3 capabilities in this set.

Part of 3 available through JWT Payload Extractor.

01 Capability
Extract token identity
Pulls a single, specific claim like a user ID or role from a token. It saves you from reading through the whole payload.
02 Capability
Check token expiry
Checks if a specific JWT has passed its expiration timestamp. It's great for quickly seeing if a session is still valid.
03 Capability
Decode jwt payload
Decodes the entire payload segment of a JWT string into readable JSON. Use this to see all claims at once.

Set up in minutes

One URL. Then ask JWT Payload Extractor to work.

Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use JWT Payload Extractor from the conversation.

Choose your client

Live preview

Advanced clients IDE · CLI

Claude · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_ZDWvfAAQYs5wuqUcHTycNIaN4acsQhRWK43rr8eY/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 Payload Extractor, and paste the URL above.
Step 03

Turn it on in chat

Select +, open Connectors, and enable JWT Payload Extractor for the conversation.

ChatGPT · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_ZDWvfAAQYs5wuqUcHTycNIaN4acsQhRWK43rr8eY/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 Payload Extractor URL.
Step 03

Save and start

Save the connection and enable JWT Payload Extractor in your conversation. Desktop may ask you to restart once.

Cursor · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "jwt-payload-extractor": {
      "url": "https://edge.vinkius.com/vk_preview_ZDWvfAAQYs5wuqUcHTycNIaN4acsQhRWK43rr8eY/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 Payload Extractor

Open Agent mode in chat and ask: "Using JWT Payload Extractor, help me...". 3 tools available

VS Code Copilot · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "jwt-payload-extractor": {
      "url": "https://edge.vinkius.com/vk_preview_ZDWvfAAQYs5wuqUcHTycNIaN4acsQhRWK43rr8eY/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 Payload Extractor

Ask Copilot: "Using JWT Payload Extractor, help me...". 3 tools available

Windsurf · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "jwt-payload-extractor": {
      "url": "https://edge.vinkius.com/vk_preview_ZDWvfAAQYs5wuqUcHTycNIaN4acsQhRWK43rr8eY/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 Payload Extractor

Open Cascade and ask: "Using JWT Payload Extractor, help me...". 3 tools available

Cline · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "jwt-payload-extractor": {
      "url": "https://edge.vinkius.com/vk_preview_ZDWvfAAQYs5wuqUcHTycNIaN4acsQhRWK43rr8eY/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 Payload Extractor

Ask Cline: "Using JWT Payload Extractor, help me...". 3 tools available

Claude Code · Terminal command

Official guide ↗

Advanced setup

claude mcp add jwt-payload-extractor --transport http "https://edge.vinkius.com/vk_preview_ZDWvfAAQYs5wuqUcHTycNIaN4acsQhRWK43rr8eY/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 Payload Extractor

Ask Claude: "Using JWT Payload Extractor, show me...". 3 tools are ready

Where the request belongs

Work JWT Payload Extractor can move forward.

Built around the request

Backend engineers and security researchers who spend too much time debugging authentication headers and session timeouts.

Backend Developer

Inspecting auth tokens during API integration tests.

Security Engineer

Auditing JWT claims for improper permission assignments.

QA Tester

Verifying that user roles are correctly reflected in the token payload.

Build the capability set

Each Connector adds new actions and data without changing how you work.

Browse Connectors

01 2 capabilities

JWT & Base64 Decoder

Stop hallucinating Base64 translations. Instantly decode complex JWT tokens into readable headers and payloads with exact expiration mathematics.

View Connector

02 1 capability

Deterministic JWT Inspector

Transform your AI into a cybersecurity diagnostic capability. Instantly decode and inspect JSON Web Tokens (Headers, Payloads, and Expiry metadata) without requiring signature keys.

View Connector

03 1 capability

JWT Decoder & Verifier

Decode and mathematically verify JWT tokens local. Ensure API authentication tokens are cryptographically authentic and not expired.

View Connector

04 4 capabilities

JWT Decoder & Validator

Decode JWT segments and verify cryptographic signatures and temporal claims.

View Connector

05 1 capability

JWT Claims Validator

Validate JWT structure and expiration claims without signature verification.

View Connector

06 3 capabilities

Webhook HMAC Signature Validator

Verify the authenticity of incoming webhook payloads by validating their HMAC signatures.

View Connector

Bring your own AI

Change the model, client or framework. Keep JWT Payload Extractor connected.

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 Payload Extractor.

The practical details behind the request, access and result.

How can I use JWT Payload Extractor to see my user data?

You simply provide the encoded token to your AI client, and it will decode the payload so you can read all the claims like user IDs or roles.

Does JWT Payload Extractor verify if a token is authentic?

No, this MCP only decodes the content. It does not perform cryptographic signature verification to check if the token was tampered with.

Can I use JWT Payload Extractor to find out when a session ends?

Yes, you can use it to inspect the expiration claim and see exactly when the token is set to expire.

Is JWT Payload Extractor useful for checking permissions?

Absolutely. You can use it to quickly pull specific permission or role claims from a token to verify your auth logic.

Do I need to provide my private keys to JWT Payload Extractor?

No, you only need the encoded JWT string itself. The capability decodes the payload without needing any secret keys.

Does this capability verify the JWT signature?

No, the server focuses exclusively on the deterministic parsing of the payload segment. It does not utilize any cryptographic primitives or secret keys to validate the integrity of the signature segment. Capabilities available: decode_jwt_payload, check_token_expiry, extract_token_identity.

How can I see the expiration date of a token?

The server extracts the 'exp' claim from the decoded JSON object and compares its Unix timestamp against the current system time to identify if the token's operational window has expired.

Can I extract specific user IDs from the token?

Yes. After parsing the payload segment into a JSON structure, the server traverses the object hierarchy to retrieve the value associated with any specified key, such as 'sub' or custom user identifiers.

One connection away

Give your agent a direct line to JWT Payload Extractor.

Connect JWT Payload Extractor once. Keep it beside 5,900+ managed Connectors when the next task needs more.

Explore every Connector No credit card required · Free tier available

JWT Payload Extractor for debugging authentication tokens

You get instant visibility into token contents without needing cryptographic keys.

Debugging expired sessions

Verifying user permissions

Automating identity checks

Extract token identity

Check token expiry

Decode jwt payload

Open Connectors

Add the URL

Turn it on in chat

Open MCP settings

Add the URL

Save and start

Open MCP Settings

Add the server config

Save the file

Start using JWT Payload Extractor

Create MCP config

Add the server config

Enable Agent mode

Start using JWT Payload Extractor

Open MCP Settings

Add the server

Save and reload

Start using JWT Payload Extractor

Open Cline MCP Settings

Add remote server

Enable the server

Start using JWT Payload Extractor

Install Claude Code

Add the Connector

Verify the connection

Start using JWT Payload Extractor

Backend Developer

Security Engineer

QA Tester

JWT & Base64 Decoder

Deterministic JWT Inspector

JWT Decoder & Verifier

JWT Decoder & Validator

JWT Claims Validator

Webhook HMAC Signature Validator

Give your agent a direct line to JWT Payload Extractor.