How to Use the JWT Decoder & Verifier MCP in Windsurf

Q: How do I install JWT Decoder & Verifier in Windsurf?

Open your settings and add the server to your mcpconfig.json file. You can also use the Settings UI under Cascade to add this MCP Server.

Inspect and verify JWTs directly inside Windsurf without leaving your active workspace or manually copying payloads.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect JWT Decoder & Verifier MCP to Windsurf

Create your Vinkius account to connect JWT Decoder & Verifier to Windsurf and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

GDPR Free for Subscribers

Setup JWT Decoder & Verifier with Windsurf

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Automate token validation with Windsurf Cascade

Let Cascade run the `decode_jwt` tool the second it spots an authentication error in your backend logs. You don't have to copy the token, open a browser tab, or run manual scripts. Cascade grabs the token from your context, decodes the claims, and tells you if it's expired or altered. This MCP Server runs entirely offline. Your keys and payloads never hit an external API. Cascade uses the tool output to fix your auth middleware or update test environment variables on the fly.

Offline cryptographic verification

Stop pasting production tokens into random web tools; use `decode_jwt` to verify signatures using local public keys or HS256 secrets directly. If a token fails verification, Cascade instantly flags the signature mismatch. The server performs math locally to verify the signature. You get immediate feedback on whether the token was tampered with, helping you debug signing key mismatches in seconds.

Immediate claim inspection

Check token expiration, issuer, and scopes directly with the `decode_jwt` tool instead of writing boilerplate parser code. The tool splits the header and payload into clean JSON objects. Cascade uses this parsed data to determine if a test client is sending expired credentials. It keeps your local testing flow moving without manual debugger breakpoints over this MCP connection.

Setup guide

Set up JWT Decoder & Verifier MCP in Windsurf

Prerequisites

Windsurf IDE installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP configuration

Click the Cascade assistant icon in the sidebar, then click the hammer icon (🔨) at the top of the panel. Select "Configure" to open ~/.codeium/windsurf/mcp_config.json.
2

Add the JWT Decoder & Verifier MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Refresh MCPs

Go back to the hammer icon (🔨) in Cascade and click "Refresh". Windsurf will detect the new server. No full restart is needed — the connection is hot-reloaded.
4

Verify in Cascade

Start a new Cascade conversation and ask something like "Show my JWT Decoder & Verifier payment history." If connected, Cascade will call the JWT Decoder & Verifier tools directly. You will see a green dot next to the server name in the MCP panel.

mcp_config.json

{
  "mcpServers": {
    "jwt-decoder-verifier-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by JSON Web Token. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

Connect JWT Decoder & Verifier now

Real-time monitoring

Live

visibility into every interaction

Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

Built-in savings

60%

lower AI costs

Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

place for every integration

Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about JWT Decoder & Verifier MCP in Windsurf

Open your settings and add the server to your `mcp_config.json` file. You can also use the Settings UI under Cascade to add this MCP Server.

Yes, it supports both HS256 and RS256 algorithms. Just pass the token and the public key to the `decode_jwt` tool, and the local engine handles the cryptographic verification.

Online tools expose your sensitive user data and signatures to third-party servers. This MCP Server runs entirely in your local environment, keeping your secrets secure.

No, Cascade can chain token decoding as part of its autonomous debugging process. It runs the MCP tool, reads the output, and updates your code without prompting you at every step.

The server processes all JWTs and cryptographic keys locally inside a secure sandbox. No token data, payloads, or signing keys ever leave your machine or get sent to external networks.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

OpenAI Agents SDK sdk-python

Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript