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Prompt Leak Scanner

Catches leaked credentials and PII in outbound LLM prompts

Connector by GuardBee · GitHub account verified by the MCP Registry

IndexedMITLocal (stdio)★ 1
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Install

Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/guardbee-prompt-leak-scanner

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Catches leaked credentials and PII in outbound LLM prompts

Reviews

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Permissions

What this server can do and what it asks for, from its tool list, install config and code. Checked Oct 25, 2026.

Tools
5 read · 0 write · 0 deleteRead-only
Secrets
None asked for
Install scripts
None found
Runs as
Node.js package

Tools by what they do 5

Read from the source code; the running server may list different tools.

Read 5 · Look things up without changing anything.

  • list_patterns
  • scan_directory
  • scan_file
  • scan_messages
  • scan_text

Network hosts it talks to 4

  • api.openai.com · found in code
  • github.com · found in code
  • guardbee.ai · found in code
  • raw.githubusercontent.com · found in code

Files it touches

  • Any path the agent passes to its tools

Tools (5)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • list_patterns

    List every credential/PII pattern this scanner detects, grouped by category

  • scan_directory

    Recursively scan a directory of prompt logs or request-body fixtures for leaked credentials and PII

  • scan_file

    Scan a single file — plain text, or a JSON chat-request-body fixture (auto-detected) — for leaked credentials and PII

  • scan_messages

    Scan an OpenAI/Anthropic-style chat request body (a JSON object with a `messages` array and/or a `system` field) for leaked credentials and PII in every message's text content, before it would be sent to the model.

  • scan_text

    Scan a raw text string (e.g. a prompt you're about to send to an LLM) for leaked credentials (API keys, private keys, JWTs) and PII (TC Kimlik No, credit card, IBAN, email, phone) — checksum-validated where applicable to keep false positives low.

Signals

Stars
1
Forks
1
Open issues
14
Weekly downloads
988
Last commit (this folder)
Oct 22, 2026 (6 days ago)
Last release
Oct 22, 2026 (6 days ago)
Last package publish
Oct 22, 2026 (6 days ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Registry name
io.github.GuardBee/prompt-leak-scanner
Version
1.0.2
Auth
No auth
Packages
npm @guardbee/mcp-prompt-leak-scanner
License
MIT
Repository
github.com/GuardBee/guardbee-mcp
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
Official MCP Registrygithub-graphql

Same server elsewhere

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Cite this page

Prompt Leak Scanner MCP server. Agent Mart. https://agentmart.dev/connectors/guardbee-prompt-leak-scanner (last updated 2026-10-24)