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Tool Filter MCP

Official

by respawn-app

MCP proxy server that filters tools from upstream MCP servers via regex-based deny list

A MCP proxy server that filters tools from upstream MCP servers via regex-based deny list. It acts as an intermediary, applying a deny-list to incoming tools and exposing a filtered tool set to clients. Designed for integration in catalogs and tooling pipelines.

🛠️ Key Features

  • Regex-based deny list to filter tools from upstream MCP servers
  • Proxy behavior between MCP upstreams and downstream clients
  • Lightweight, focused on tool-level filtering
  • Descriptive readme excerpt aligned with repository metadata

🚀 Use Cases

  • Catalogs that aggregate MCP tools while excluding unwanted entries
  • Pre-filtering MCP results before display or distribution
  • Lightweight middleware for tool governance in MCP ecosystems

⚡ Developer Benefits

  • Clear ground-truth for filtering logic via regex rules
  • Simple integration point between MCP servers and consumer apps
  • DNS and routing agnostic proxy behavior for flexible deployment
  • Readme excerpt provides quick context for new contributors

⚠️ Limitations

  • Filtering relies on regex accuracy; false positives/negatives possible
  • Behavior depends on upstream MCP server responses
  • Minimal feature scope: tool filtering only, no full MCP protocol emulation

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Tool Filter MCP - agentage MCP Catalog