Use JWT Decoder & Validator with your AI.
Connect your account once and let the AI you already use work with it, without building another integration. Decode JWT segments and verify cryptographic signatures and temporal claims.
Developed, maintained, and hosted by Vinkius.
MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED
Waiting for input…
Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.
Complete set · 4 capabilities
The complete JWT Decoder & Validator capability set.
These are the exact actions your AI can choose when you ask it to work with JWT Decoder & Validator.
01-04
4 capabilities in this set.
Part of 4 available through JWT Decoder & Validator.
- 01
Validate jwt temporal claims
Checks the validity of standard time-based claims against the current system time
- 02
Verify jwt signature
Cryptographically validates that the signature matches the provided header and payload using a specified key
- 03
Decode jwt components
Extracts and decodes the readable JSON content from the JWT header and payload
- 04
Parse jwt string
Verifies if a provided string adheres to the fundamental three-part format of a JWT
Observed, not estimated
632ms average. Fast in production.
JWT Decoder & Validator is checked daily against the live service.
- Fastest day
- 486ms
- Slowest day
- 802ms
- 14-day trend
- Slowing+24%
Connect your client
One URL. Every client.
Activate the Connector, copy your link, and paste it into the client you already use. 4 capabilities arrive 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 Decoder & Validator, so you can see the experience inside your AI.
It does not authenticate your account with JWT Decoder & Validator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.
JWT Decoder & Validator Connector
You're all set. Choose your MCP client and follow the setup instructions.
https://edge.vinkius.com/vk_preview_E47Wl1pMoDCfXmcNGBlWo7ceQ1TGjYjWMSJWkgQy/mcpClaude 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 — JWT Decoder & Validator capabilities are ready to use.
{
"mcpServers": {
"jwt-decoder-validator-mcp": {
"url": "https://edge.vinkius.com/vk_preview_E47Wl1pMoDCfXmcNGBlWo7ceQ1TGjYjWMSJWkgQy/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
FAQ
Questions JWT Decoder & Validator owners ask.
- 01
What algorithms are supported for signature verification?
The verify_jwt_signature capability supports HS256, RS256, and ES256 algorithms.
- 02
Can I check if a token has expired?
Yes, by using the validate_jwt_temporal_claims capability with the decoded payload and the current timestamp.
- 03
Does this server verify the authenticity of the token?
The verify_jwt_signature capability can validate the signature if you provide the appropriate secret or public key.
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