HMAC Signature Validator Connector for AI agents.
3 live capabilities
Secure cryptographic signature generation and verification
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Why people use HMAC Signature Validator
Secure HMAC Signature Validation for API Security
With this MCP, that friction disappears. You tell your agent what the message and key are, and it handles the math instantly. You get the signature or the verification result right in your chat, keeping your entire security testing workflow in one place.
What Vinkius changes
You get professional-grade cryptographic verification directly inside your chat interface.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 6,100+ Connectors
- Real-world use case 01
Webhook security testing
A developer needs to ensure their server correctly validates GitHub webhooks.
- Real-world use case 02
API authentication debugging
An engineer is getting 401 errors on an API.
- Real-world use case 03
Data integrity audits
A security analyst uses the MCP to verify that a batch of transmitted logs hasn't been tampered with by checking their HMAC signatures.
Complete set · 3capabilities
The complete HMAC Signature Validator capability set.
These are the exact actions your AI can choose when you ask it to work with HMAC Signature Validator.
01—03
3 capabilities in this set.
Part of 3 available through HMAC Signature Validator.
- 01 Capability
Compute hmac
Calculates an HMAC signature for a message using SHA256 or SHA1. It's perfect for generating signatures to test API authentication.
- 02 Capability
Get supported algorithms
Lists the cryptographic algorithms available for signing and verification. Use this to confirm which hashing method to use.
- 03 Capability
Verify hmac signature
Validates a signature against a message and key using secure constant-time comparison. This prevents timing attacks during verification.
Set up in minutes
One URL. Then ask HMAC Signature Validator to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use HMAC Signature Validator from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it HMAC Signature Validator, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable HMAC Signature Validator for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the HMAC Signature Validator URL.
- Step 03
Save and start
Save the connection and enable HMAC Signature Validator in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"hmac-signature-validator": {
"url": "https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp"
}
}
}- Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using HMAC Signature Validator
Open Agent mode in chat and ask: "Using HMAC Signature Validator, help me...". 3 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"hmac-signature-validator": {
"url": "https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp"
}
}
}- Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using HMAC Signature Validator
Ask Copilot: "Using HMAC Signature Validator, help me...". 3 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"hmac-signature-validator": {
"url": "https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp"
}
}
}- Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using HMAC Signature Validator
Open Cascade and ask: "Using HMAC Signature Validator, help me...". 3 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"hmac-signature-validator": {
"url": "https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp"
}
}
}- Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using HMAC Signature Validator
Ask Cline: "Using HMAC Signature Validator, help me...". 3 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add hmac-signature-validator --transport http "https://edge.vinkius.com/vk_preview_gWGMvzG4iAvT97lHqBpehck0DefoznivwVASd4tU/mcp"- Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using HMAC Signature Validator
Ask Claude: "Using HMAC Signature Validator, show me...". 3 tools are ready
Where the request belongs
Work HMAC Signature Validator can move forward.
This is for developers and security engineers who need to validate data integrity or test webhook security without leaving their AI-driven development environment.
Backend Engineer
Validating that incoming requests from third-party services match the expected signatures.
Security Researcher
Testing the strength of HMAC implementations and verifying signature logic.
DevOps Engineer
Automating the verification of secure communication between distributed services.
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Bring your own AI
Change the model, client or framework. Keep HMAC Signature Validator connected.
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Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
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Before you connect
Questions about HMAC Signature Validator.
The practical details behind the request, access and result.
How can I use the HMAC Signature Validator MCP to test my webhooks?
You can ask your agent to generate a valid signature for a specific payload using the compute_hmac capability. You then use that signature to simulate a real request from a service like GitHub or Stripe to see if your server accepts it.
Does the HMAC Signature Validator MCP protect against timing attacks?
Yes. The verify_hmac_signature capability uses constant-time comparison, which ensures that the time taken to validate a signature doesn't reveal information about the correct signature to an attacker.
Can I use this MCP with Claude or Cursor?
Yes, as long as you are using an MCP-compatible client like Claude, Cursor, or Windsurf, you can connect this MCP and use it immediately.
What algorithms does the HMAC Signature Validator MCP support?
The MCP currently supports SHA256 and SHA1 algorithms for both generating and verifying HMAC signatures.
Is it possible to verify a signature if I don't know the algorithm used?
You should first use the capability to check which algorithms are supported, then attempt verification with the most likely algorithm (usually SHA256) to see if it matches.
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 capability 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 capability to generate a hexadecimal HMAC signature for any message and secret key.
One connection away
Give your agent a direct line to HMAC Signature Validator.
Connect HMAC Signature Validator once. Keep it beside 6,100+ managed Connectors when the next task needs more.
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