sncro.net
Live browser debugging for AI assistants — DOM, console, network via MCP.
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Overview
Open-source components of sncro — the MCP relay, the browser-side agent, and the framework plugins that let AI coding assistants inspect a live browser. 1. Claude calls create_session (MCP tool) → relay returns a 9-digit session key + URL 2. User visits the URL in the browser where their app is running → confirms via "Allow sncro debugging?" 3. The plugin drops a cookie, agent.js is injected into subsequent HTML responses on that origin 4. agent.js pushes baseline data (console, errors) and long-polls for on-demand queries (query_element, get_page_snapshot, etc.)
Installation
Installation instructions are not available yet.
Configuration
Configuration example is not available yet.
Capabilities
- Create a debugging session
ask your AI assistant to call `create_session` so you can connect a live browser tab to the relay.
- Inspect the current page
request a full DOM snapshot of the connected browser tab using `get_page_snapshot`.
- Query a specific element
ask the assistant to retrieve details about a DOM element via `query_element`.
- Capture console output
have the assistant surface console logs and errors that agent.js pushed from the browser.
- Integrate sncro into a FastAPI or Flask app
drop in the provided middleware so your local dev server injects agent.js automatically.
Tags
- browser
- debugging
- development
- browser-automation
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