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OAuth Auditor

Scans MCP server auth code for OAuth 2.1 anti-patterns: token passthrough, missing audience

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-oauth-auditor

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

Scans MCP server auth code for OAuth 2.1 anti-patterns: token passthrough, missing audience

Reviews

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No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

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

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

Tools by what they do 4

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

Read 4 · Look things up without changing anything.

  • list_patterns
  • scan_directory
  • scan_file
  • scan_text

Network hosts it talks to 5

  • github.com · found in code
  • guardbee.ai · found in code
  • legit.com · found in code
  • legit.com.evil.com · found in code
  • raw.githubusercontent.com · found in code

Files it touches

  • Any path the agent passes to its tools

Tools (4)

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 OAuth/token-handling pattern this auditor detects, grouped by category

  • scan_directory

    Recursively scan a directory of MCP server source for OAuth/token-handling anti-patterns

  • scan_file

    Scan a single file for OAuth/token-handling anti-patterns

  • scan_text

    Scan an MCP server's authorization code for OAuth 2.1 anti-patterns named in the MCP spec's own Security Considerations: token passthrough (forwarding a client's token to a downstream API unchanged), missing audience validation on JWT verification, OAuth/OIDC discovery SSRF, missing PKCE, loose redirect_uri validation, and hardcoded client secrets.

Signals

Stars
1
Forks
1
Open issues
14
Weekly downloads
813
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/oauth-auditor
Version
0.3.0
Auth
No auth
Packages
npm @guardbee/mcp-oauth-auditor
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

Copies of this server published by others; search shows only one of them.

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Cite this page

OAuth Auditor MCP server. Agent Mart. https://agentmart.dev/connectors/guardbee-oauth-auditor (last updated 2026-10-24)