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Connect JWT Claims Validator to ChatGPT, Claude and Gemini

Set it up once and it works in ChatGPT, Claude, Cursor, and any other client you love. It all runs safely in the background, so you can relax and focus on what really matters. Inspect token payloads and expiration claims instantly.

Ask AI about this Connector

Developed, maintained, and hosted by Vinkius.

MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED

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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.

ChatGPTClaudeCursorPerplexityGeminiMicrosoft CopilotRaycastMeta AI

Your AI does the work. We keep it safe and sound.

No other AI tool gives you this. Your workflow runs in the client you already love, your account stays protected, and you decide what the agent can and cannot do. It is the whole reason to make the switch.

Each Connector lives inside our infrastructure, the same place where your workflow runs. The three things below are already part of it, working quietly in the background so you never have to think about them. Nothing to add, nothing to set up, nothing to worry about.

A futuristic MCP client docking bay
V8 Isolate01

Each Connector runs inside its own sealed environment.

Each Connector runs inside its own sealed V8 runtime — no access to your files, your system, or other servers. A Connector never sees past its own request.

Kill Switch02

One switch stops every agent. Instantly.

One action deactivates every Connector, revokes every token, and ends every session at once. AI Governance keeps the record.

FinOps per User03

Spending limits that pause instead of surprise.

Every user keeps their own connections and credentials, isolated from everyone else. Anything that would cross your spending limit is held for your approval, not billed.

Three controls, built into the layer your AI connects through.

Curated set · 1 capability

We ship only the actions that matter.

Capability set01 / 01

01

1 capability in this set.

Part of 1 available through JWT Claims Validator.

  1. 01

    Validate jwt

    The validate_jwt capability checks if a JWT's structure is correct and if its time-based claims are currently valid.

Real work

What teams actually run

01

Pre-flight API Checks

Your agent checks a token's expiration before attempting an authenticated request to an external service.

02

Debugging Auth Failures

You paste a suspicious token into your AI client to see if the expiration or 'not before' claims are the cause of a 401 error.

03

Automated Token Testing

An AI agent uses the capability to verify that a series of generated tokens follow the expected time-based constraints.

04

Payload Inspection

You quickly read the contents of a JWT payload without using external web-based decoders.

One connector, every AI

JWT Claims Validator works with the most popular AI clients.

These are the most popular clients, each with a step-by-step guide: one link, set up once, with governance and visibility built in. And because everything runs on the MCP standard, the same connection also works in any other compatible client — nothing to rebuild.

ClaudeClaudeChatGPTChatGPTGeminiGeminiPerplexityPerplexityGrokGrokMicrosoft CopilotMicrosoft CopilotCursorCursorVS CodeVS CodeWindsurfWindsurfJetBrainsJetBrainsClineClineLangChainLangChainVercel AI SDKVercel AI SDKLovableLovableZ.aiZ.aiRaycastRaycastQwen CodeQwen CodeKimi CodeKimi CodeLe ChatLe Chat

Building your own app? The connector is yours to use.

You don't need a client to put JWT Claims Validator to work: the same hosted connection plugs into your own applications and agent code, with the same governance on every request. Build with it, chat with it — one connection for both.

Observed, not estimated

565ms average. Fast in production.

JWT Claims Validator is checked daily against the live service.

Daily averagePeak 790ms
Oct 3Today
Fastest day
490ms
Slowest day
790ms
14-day trend
Stable-3%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 1 capability arrives ready to run.

Preview access · not provider authentication

The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of JWT Claims Validator, so you can see the experience inside your AI.

It does not authenticate your account with JWT Claims Validator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

JWT Claims Validator Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_P6u7uYZqm7b1xlgsX1l9T96GkSQC7KF63hyJ7LU0/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — JWT Claims Validator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "jwt-claims-validator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_P6u7uYZqm7b1xlgsX1l9T96GkSQC7KF63hyJ7LU0/mcp"
    }
  }
}
  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Step-by-step instructions for each client are in the guide. How to connect

Guided setup for Claude? Set up JWT Claims Validator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work JWT Claims Validator owners hand off.

This MCP is built for developers working with authentication and API security.

  • 01

    Backend Developers

    They use it to debug why authentication requests are failing in their local environments.

  • 02

    Security Engineers

    They use it to quickly inspect token claims during security audits or testing.

  • 03

    QA Engineers

    They hand off token strings to their AI agent to automate the testing of token expiration logic.

FAQ

Questions JWT Claims Validator owners ask.

  • 01

    Does this MCP verify the JWT signature?

    No, this MCP does not perform signature verification. It focuses on decoding the payload and checking claims like expiration and issuance times.

  • 02

    Which claims does it check?

    It checks critical time-based claims including exp (expiration), nbf (not before), and iat (issued at).

  • 03

    Can I use this with Claude?

    Yes, you can use this MCP with any MCP-compatible client, including Claude, Cursor, and Windsurf.

  • 04

    Why use this instead of a standard decoder?

    This allows your AI agent to perform the validation itself as part of a larger, automated workflow or debugging session.

  • 05

    Is it safe to use with sensitive tokens?

    The MCP performs local decoding of the payload to check claims, making it a capability for inspecting the structure and timing of the token.

  • 06

    Does this capability verify the cryptographic signature of the JWT?

    No. This capability focuses on structural and claim-based validation (like expiration) without performing expensive cryptographic signature verification.

  • 07

    What claims are checked during validation?

    The capability checks the exp (expiration), nbf (not before), and iat (issued at) claims to ensure the token is currently valid.

  • 08

    Can I use this with Claude Desktop or Cursor?

    Yes, you can connect this MCP server to Claude Desktop, Cursor, VS Code, Windsurf, and any other MCP-compatible client via Vinkius Edge.

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