feedthrough/feedthrough

Overview

Feedthrough is a TypeScript debug bridge that embeds into a web application and exposes runtime internals to AI agents through the Model Context Protocol (MCP). It acts as a communication layer between live application state and external agentic tools.

Best for

Best for
Developers building AI agents that need live introspection of web application internals

Use cases

• Inspecting live application state during AI-assisted debugging
• Feeding real-time runtime data to agentic coding assistants
• Building custom AI agent integrations that need access to web app internals

How to use

Install

npx @feedthrough/mcp

Tools exposed

• get_instructions()
• query_dom(selector)
• inspect_element(selector, properties?)
• get_html(selector)
• get_console_logs(limit?, levels?, match?, since?)
• get_network_requests(filter?, since?)
• get_page_info()
• connection_status()
• click(selector)
• fill(selector, value)
• hover(selector)
• press_key(selector, key)
• set_style(selector, properties)
• set_attribute(selector, name, value)
• set_text(selector, text)
• reset_overrides()

Tested with

Claude Code, Cursor

Example client config

{\n  "mcpServers": {\n    "feedthrough": {\n      "command": "npx",\n      "args": ["@feedthrough/mcp"]\n    }\n  }\n}

Notes

Feedthrough is a TypeScript debug bridge that embeds into a web application and exposes runtime internals to AI agents through the Model Context Protocol (MCP). It acts as a communication layer between live application state and external agentic tools.

2 stars on GitHub. Last updated 2026-06-10. Licensed MIT.

Use cases

• Inspecting live application state during AI-assisted debugging
• Feeding real-time runtime data to agentic coding assistants
• Building custom AI agent integrations that need access to web app internals

Pros

• Direct runtime access enables deep debugging without static analysis
• Leverages MCP standard for interoperability with multiple agent frameworks
• Minimal overhead as a lightweight TypeScript module

Cons

• Very early project (2 stars) with limited community validation
• Embedding a debug bridge in production apps may pose security risks
• Requires custom integration effort beyond simple drop-in usage

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.