What algorithms are supported?

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

How does this prevent timing attacks?

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

Can I generate new signatures?

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

HMAC Signature Validator MCP Connector for Claude

A+

High-precision HMAC signature generation and verification with constant-time comparison.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides high-precision cryptographic tools for generating and verifying HMAC signatures. It supports SHA256 and SHA1 algorithms, specifically engineered to prevent timing attacks through constant-time comparison. Use compute_hmac to generate signatures and verify_hmac_signature to validate them securely.

hmacsha256sha1securitycryptography

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp

② Claude Code (terminal)

claude mcp add --transport http hmac-signature-validator https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "hmac-signature-validator": {
      "url": "https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp"
    }
  }
}

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