OpenTabs

OpenTabs is an open-source platform designed to enable AI agents to interact directly with any web application by leveraging the user's authenticated browser session. Rather than simulating user actions or relying on public APIs, it reverse-engineers the internal APIs used by web app frontends, allowing AI to make the same backend calls through the browser. This approach eliminates the need for screenshots or DOM manipulation and provides a more reliable and efficient way for AI agents to perform actions on web apps.

The platform consists of a Chrome extension, an MCP (Machine Control Protocol) server, and a plugin SDK. AI agents communicate with OpenTabs by sending tool calls, which are routed to the appropriate browser tab via the MCP server and executed on the real web application. Results are then returned to the agent. OpenTabs supports integration with a range of MCP clients that use Streamable HTTP, including Claude, Code Cursor, and Windsurf, among others. The system offers over 100 plugins and approximately 2,000 tools, enabling access to a wide variety of web services such as Slack, Discord, GitHub, Jira, Notion, Figma, AWS, Stripe, Robinhood, Netflix, Airbnb, Spotify, DoorDash, and Linear, with coverage across messaging, DevOps, finance, shopping, streaming, and other domains.

Plugin development is a key aspect of OpenTabs. The platform can analyze web pages, discover internal APIs, scaffold code, and register plugins—many of which are generated by AI itself. Users can choose to publish plugins or keep them local for internal use. The plugin system is designed with security in mind: all plugins are disabled by default, and users have granular control over which plugins to trust and enable. Before activation, AI-assisted code review is available to examine the adapter source code, and findings are presented for user approval. Plugin permissions reset upon updates, and a full audit log records every tool call, including its success or failure. All operations run locally, with no cloud involvement or telemetry.

OpenTabs is distributed as open-source software under the MIT license and can be installed via npm. Its architecture and plugin system are intended for developers and AI practitioners seeking to extend agent capabilities across diverse web applications using their existing browser sessions.