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Trestle

Official registry Developer tools

Detects leaked secrets (API keys, tokens, private keys) in source code.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @trestlescan/mcp
Claude Code 
claude mcp add trestle -- npx -y @trestlescan/mcp@1.4.1 '<workspace_path>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "trestle": {
            "command": "npx",
            "args": [
                "-y",
                "@trestlescan/mcp@1.4.1",
                "<workspace_path>"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. What Trestle does
  2. Building from source
  3. Quick start
  4. Checking whether a secret is live
  5. GitHub Action
  6. Community and Pro
  7. About this repository
  8. License

A local secret scanner for source code. Trestle finds API keys, access tokens, passwords, private keys, and certificates before commiting them by mistake, and keeps them from leaving your machine.

This is the Community edition. Open source under Apache-2.0, and a mirror of the version distributed at [trestlescan.com][trestlescan].

What Trestle does

  • Detection. Hundreds of credential patterns from real services (OpenAI, Anthropic, Stripe, AWS, GitHub, Google, Slack, Sentry, and more), plus unfamiliar keys spotted by entropy, variable names, and surrounding code.
  • Code-aware. Trestle parses your files instead of running plain regular expressions, so it can tell an environment variable from a build argument, a header, a parameter, or a constant in source.
  • Runs everywhere you work. Command line scanner, file watcher, pre-commit hook, language server for LSP-aware editors (Neovim, Helix, Zed, JetBrains), MCP server for AI assistants (Claude Code, Cursor, Copilot, Codex), and a native VS Code extension.
  • Local only. Runs entirely on your machine. No network, no telemetry, no account, no signup.
  • One static binary. No runtime to install, multi-threaded, and honors .gitignore and your own skip rules.

Building from source

A recent stable Rust toolchain is the only prerequisite.

cargo build --release

This builds two binaries: trestle, which does not make network requests, and trestle-net, which can check whether found secrets are still live.

Quick start

In any project directory:

trestle install  # adds a pre-commit hook and AI instructions
trestle scan     # scans the current directory

Other commands:

  • trestle watch keeps scanning as files change.
  • trestle lsp starts the language server.
  • trestle mcp starts the MCP server.
  • trestle uninstall removes the integration from a project.

Checking whether a secret is live

The default trestle binary does not make network requests. The separate trestle-net binary adds an optional check that contacts each detected secret's provider to confirm whether the credential is still valid:

trestle-net scan --validate

Each finding is then labeled (active), (inactive), or (could not verify). This check runs only in trestle-net, so the trestle binary remains fully offline.

The full documentation is available at [trestlescan.com/documentation][docs].

GitHub Action

Use the official GitHub Action to scan every push and pull request:

name: Secret scan

on:
  push:
  pull_request:

jobs:
  trestle:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: toro-guapo/trestle-action@v1

See [toro-guapo/trestle-action][trestle-action] for inputs, outputs, SARIF upload to the GitHub Security tab, and supported runners.

Community and Pro

Trestle is open core.

  • Community (this repository) handles detection. Every finding is reported with its location and the rule that flagged it. Apache-2.0 licensed.
  • Pro adds remediation guidance: for each finding, the steps to remove the secret from source, what to keep in your local .env, and per-platform rotation guides for AWS, GitHub Actions, Vercel, Netlify, Kubernetes, Doppler, and other targets. Distributed under a commercial license.

Pro is available at [trestlescan.com][trestlescan].

About this repository

This is a read-only mirror, refreshed on every Community release. Development happens in a private repository.

Issues and discussion are welcome on GitHub. Pull requests are not accepted through this mirror. If you have a fix or an idea, please open an issue.

License

Apache License 2.0. See LICENSE.

[trestlescan]: https://trestlescan.com [docs]: https://trestlescan.com/documentation [trestle-action]: https://github.com/toro-guapo/trestle-action

Frequently asked questions

What is Trestle?

Detects leaked secrets (API keys, tokens, private keys) in source code.

How do I install Trestle?

It runs on your machine. In Claude Code: claude mcp add trestle -- npx -y @trestlescan/mcp@1.4.1 '<workspace_path>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Trestle need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Trestle open source?

Yes. Its code is on GitHub under the Apache-2.0 license.

Who maintains Trestle?

It is published by toro-guapo. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.