Extenda: An AI-Powered Browser Automation Proxy Tool Supporting 14+ Platform Integrations

Extenda is an open-source AI-driven browser proxy tool that enables cross-application workflow automation via Chrome extension and API. Its core features include support for 14+ platform integrations, 219 available tools, OAuth secure authentication, flexible workflow orchestration, and an intelligent sidebar UI, aiming to solve the pain points of cross-application data processing and task automation in digital work environments.

In complex digital work environments, cross-application data processing and task automation are key to efficiency improvement. Extenda was open-sourced by developer jsodeh with the goal of combining AI and browser automation to build an intelligent proxy system that understands user intent and completes tasks across SaaS platforms. Its architecture includes an API server based on the Hono framework and a Chrome extension built with React, balancing backend capabilities and user interaction.

Extenda uses a monorepo structure managed by pnpm (apps/api, apps/extension, packages/shared). It is built around 219 tools (6 basic + 213 adapter actions), covering 14+ mainstream SaaS platforms such as Gmail and Slack. The API layer uses the Hono framework and integrates 14 OAuth adapters; the extension layer provides functions like sidebar UI based on React.

Extenda supports secure authentication from 11 OAuth providers and uses AES-256-GCM encryption to protect OAuth tokens. Users can configure AI providers (Google Gemini, OpenAI, Anthropic) on the settings page, select models like gemini-pro/gpt-4/claude-3, and input their own API keys (BYOM mode), balancing security and flexibility.

Users describe tasks in natural language (e.g., "Summarize the last 5 emails"), and the system automatically creates a workflow plan. It supports multiple execution modes: step dependencies to ensure order, parallel execution to improve efficiency, conditional logic to dynamically adjust the process, and result injection to allow subsequent steps to reference previous outputs. For example: GmailScraper fetches emails → AIProcessor generates summaries (dependency execution).

The Chrome extension provides an intelligent sidebar (input commands, view plans, approve, manage settings, track history) and workflow template functions (e.g., "Email Summary") to lower the entry barrier. For deployment, the backend API can be deployed to Google Cloud Run + Cloud SQL PostgreSQL, with complete gcloud commands provided in the documentation; the extension layer supports adding new platform adapters or custom tools, and WebSocket ensures real-time synchronization.

Extenda is suitable for users who switch between multiple SaaS platforms: sales teams can automate email extraction of customer information → update CRM → send follow-up messages; project managers can automate project status collection → generate reports → distribute notifications. It demonstrates the potential of AI agents to understand complex complex intentions and plan multi-step execution, representing the development direction of office automation.

As an open-source AI browser proxy tool, Extenda provides a complete cross-application automation solution through rich integrations, flexible orchestration, secure mechanisms, and a user-friendly UI. It is a project worth attention for both developers and users. In the future, with the evolution of AI and the addition of more adapters, it is expected to become an important tool for improving efficiency, and the open-source community can participate in its improvement and refinement.