How does the MCP detect leaks?

It uses the Longest Common Substring (LCS) algorithm via dynamic programming to find exact character-for-character matches between the output and the system prompt.

What makes a leak high risk?

The risk score increases if the leaked text contains sensitive keywords like 'MANDATORY' or 'priority' defined in your instructions.

Can I use this with Cursor or Windsurf?

Yes, this MCP is compatible with any MCP-compatible client including Claude, Cursor, and Windsurf.

What information do I get from a leak detection?

You get the leakage percentage, the specific character offsets of the leaked segments, and a risk classification.

Does this MCP host the data?

Yes, Vinkius hosts and manages the MCP, so you only need to connect your client once to start using it.

How does the capability detect leakage?

The detect_leakage capability uses exact substring matching to find continuous sequences of characters in the agent's output that are identical to the original system prompt.

What is a Security Risk Score?

It is a weighted evaluation where the score increases if the leaked segments contain sensitive keywords defined in your security configuration.

Can I see where the leak happened?

Yes, the capability returns exact character offsets for every contiguous leaked block found in the output.

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Connect System Prompt Leakage Detector 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. Protect your agent's core logic from instruction leaks.

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.

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.

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 System Prompt Leakage Detector.

01
Analyze leakage density
This capability checks if leaked text is concentrated in one specific block or scattered throughout the response.
02
Detect leakage
This capability scans agent outputs for verbatim repetitions of your system prompt and calculates a risk score.
03
Get risk classification
This capability converts raw security scores into human-readable severity levels for your security reports.

Real work

What teams actually run

Prompt Injection Testing

Test if a user can force your agent to reveal its internal logic through clever phrasing.

Automated Security Auditing

Run checks on agent logs to identify patterns of instruction exfiltration.

Guardrail Validation

Verify that your existing safety filters are actually preventing verbatim prompt leaks.

Risk Assessment

Quantify the danger of specific outputs using the risk classification capability.

One connector, every AI

System Prompt Leakage Detector 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.

Building your own app? The connector is yours to use.

You don't need a client to put System Prompt Leakage Detector 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

734ms average. Fast in production.

System Prompt Leakage Detector is checked daily against the live service.

Daily averagePeak 938ms

Oct 3Today

Fastest day: 646ms
Slowest day: 938ms
14-day trend: Improving-14%

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 System Prompt Leakage Detector, so you can see the experience inside your AI.

It does not authenticate your account with System Prompt Leakage Detector. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.

System Prompt Leakage Detector Connector

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

Connector linkhttps://edge.vinkius.com/vk_preview_yMAsL4yWDRbK69R8LLTjB0GTLTzNpZnBPICtwOyQ/mcp

Claude 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 — System Prompt Leakage Detector capabilities are ready to use.

Configuration · claude_desktop_config.jsonCopy

{
  "mcpServers": {
    "system-prompt-leakage-detector-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_yMAsL4yWDRbK69R8LLTjB0GTLTzNpZnBPICtwOyQ/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 System Prompt Leakage Detector in Claude and other AIs

See all the AI clients this connector works with ↑

Who it's for

Built for the work System Prompt Leakage Detector owners hand off.

This MCP is built for developers and security engineers building agentic workflows that require strict instruction privacy.

01
AI Engineers
They use it to validate that their custom system prompts aren't being exposed to end users.
02
Security Researchers
They use it to test the robustness of agent guardrails against prompt injection.
03
DevOps Engineers
They use it to monitor and report on the security health of deployed AI agents.

FAQ

Questions System Prompt Leakage Detector owners ask.

01
How does the MCP detect leaks?
It uses the Longest Common Substring (LCS) algorithm via dynamic programming to find exact character-for-character matches between the output and the system prompt.
02
What makes a leak high risk?
The risk score increases if the leaked text contains sensitive keywords like 'MANDATORY' or 'priority' defined in your instructions.
03
Can I use this with Cursor or Windsurf?
Yes, this MCP is compatible with any MCP-compatible client including Claude, Cursor, and Windsurf.
04
What information do I get from a leak detection?
You get the leakage percentage, the specific character offsets of the leaked segments, and a risk classification.
05
Does this MCP host the data?
Yes, Vinkius hosts and manages the MCP, so you only need to connect your client once to start using it.
06
How does the capability detect leakage?
The detect_leakage capability uses exact substring matching to find continuous sequences of characters in the agent's output that are identical to the original system prompt.
07
What is a Security Risk Score?
It is a weighted evaluation where the score increases if the leaked segments contain sensitive keywords defined in your security configuration.
08
Can I see where the leak happened?
Yes, the capability returns exact character offsets for every contiguous leaked block found in the output.

Explore

More in Developer Tools

Connect System Prompt Leakage Detector to Claude, Cursor, ChatGPT & more

Your AI does the work. We keep it safe and sound.

Each Connector runs inside its own sealed environment.

One switch stops every agent. Instantly.

Spending limits that pause instead of surprise.

We ship only the actions that matter.

01-03

Analyze leakage density

Detect leakage

Get risk classification

What teams actually run

Prompt Injection Testing

Automated Security Auditing

Guardrail Validation

Risk Assessment

Building your own app? The connector is yours to use.

System Prompt Leakage Detector Connector

Claude Desktop

AI Engineers

Security Researchers

DevOps Engineers

How does the MCP detect leaks?

What makes a leak high risk?

Can I use this with Cursor or Windsurf?

What information do I get from a leak detection?

Does this MCP host the data?

How does the capability detect leakage?

What is a Security Risk Score?

Can I see where the leak happened?

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