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Connect HMAC Signature Validator to ChatGPT and Claude

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. Securely generate and verify cryptographic signatures with your AI agent.

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 · 3 capabilities

We ship only the actions that matter.

Capability set01 / 01

01-03

3 capabilities in this set.

Part of 3 available through HMAC Signature Validator.

  1. 01

    Compute hmac

    This capability calculates an HMAC signature for a specific message. You provide a message, a secret key, and choose between SHA256 or SHA1 algorithms.

  2. 02

    Verify hmac signature

    This capability validates a signature against a message and secret key. It uses constant-time comparison to ensure the verification is secure against timing attacks.

  3. 03

    Get supported algorithms

    This capability lists the cryptographic algorithms currently available for signing and verification.

Real work

What teams actually run

01

Webhook Testing

Your agent generates valid signatures to simulate incoming requests from third-party services.

02

API Security Audits

Verify that your application correctly validates HMAC signatures sent by clients.

03

Data Integrity Checks

Ensure that messages have not been tampered with during transmission.

04

Automated Protocol Testing

Use the MCP to run repetitive signature verification tests as part of a development cycle.

One connector, every AI

HMAC Signature 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 HMAC Signature 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

866ms average. Fast in production.

HMAC Signature Validator is checked daily against the live service.

Daily averagePeak 932ms
Oct 3Today
Fastest day
671ms
Slowest day
932ms
14-day trend
Improving-5%

Connect your client

One URL. Every client.

Activate the Connector, copy your link, and paste it into the client you already use. 3 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 HMAC Signature Validator, so you can see the experience inside your AI.

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

HMAC Signature Validator Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/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 — HMAC Signature Validator capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "hmac-signature-validator-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/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 HMAC Signature Validator in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work HMAC Signature Validator owners hand off.

This MCP is built for technical professionals who need to validate data integrity and authenticity within their AI-driven workflows.

  • 01

    Backend Developers

    Use the MCP to test webhook implementations and API security logic.

  • 02

    Security Engineers

    Verify signature validation logic is resistant to timing attacks.

  • 03

    DevOps Engineers

    Validate message integrity for automated system communications.

FAQ

Questions HMAC Signature Validator owners ask.

  • 01

    How does this MCP prevent timing attacks?

    It uses constant-time comparison during the verification process, which ensures the time taken to validate a signature does not reveal information about the correct key.

  • 02

    Which algorithms can I use?

    The MCP supports SHA256 and SHA1 for both generating and verifying signatures.

  • 03

    Can I use this with Cursor or VS Code?

    Yes, any MCP-compatible client like Cursor, Windsurf, or VS Code can use this capability once connected through Vinkius.

  • 04

    Do I need to manage my own cryptographic libraries?

    No, Vinkius hosts the MCP, so the cryptographic logic is handled by the capability itself.

  • 05

    How do I see which algorithms are currently supported?

    You can ask your agent to use the get_supported_algorithms capability to see the available options.

  • 06

    What algorithms are supported?

    The server supports SHA256 and SHA1 algorithms. You can use get_supported_algorithms to confirm availability.

  • 07

    How does this prevent timing attacks?

    The verify_hmac_signature capability uses constant-time comparison, ensuring the verification time remains identical regardless of whether the signature is correct or where a mismatch occurs.

  • 08

    Can I generate new signatures?

    Yes, you can use the compute_hmac capability to generate a hexadecimal HMAC signature for any message and secret key.

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