Vessel Browser, developed by Unmodeled Tyler, is an open-source AI browser built on TypeScript, Node.js 22, Chromium, and Electron. This mcp category program is designed for AI agents to drive web interactions, providing a local Model Context Protocol server. It offers various distribution methods, including Linux AppImage and npm, with macOS releases available from source. Vessel Browser integrates an AI assistant capable of connecting to multiple AI providers.

What does Vessel Browser connect to?

Vessel Browser connects to external AI agents and harnesses, such as Hermes Agent and OpenClaw. It functions as a local Model Context Protocol (MCP) server. The built-in AI assistant can connect to a variety of AI providers, including Anthropic, OpenAI, Ollama, llama.cpp, and other OAI-compatible endpoints. This allows agents to interact with different AI models for diverse tasks.

Core features and tools

Vessel Browser exposes over 40 MCP-native tools for agent-driven browser control, supporting capabilities like research, page reading, navigation, form work, and multi-step web tasks. It includes a Command Bar (Ctrl+L) for harness-driven workflows and a Supervisor Sidebar (Ctrl+Shift+L) for live oversight. The Supervisor Sidebar provides a Run Inbox, conversation Threads, approvals, checkpoints, changes, and Research functions.

Who is it for?

Vessel Browser is primarily designed for AI agents, positioning the agent as the main driver with a human in a supervisory role. It also serves power users and developers who require agent-driven web interactions. The program supports durable browser states and persistent sessions for long-running agent systems. Skip this if your primary need is traditional human-centric web browsing without agent interaction.

How to get started

External MCP clients authenticate using a bearer token. The stdio proxy automatically reads this token from "~/.config/vessel/mcp-auth.json" at connection time, and direct HTTP connections are also supported.

Use cases

• AI-assisted web browsing and research, including page navigation, content summarization, form filling, and multi-step web tasks.
• Autonomous agent operation with human-in-the-loop supervision, allowing observation, approval of sensitive actions, pausing, redirection, or manual takeover.
• Persistent and stateful agent sessions, offering durable browser states, sessions that survive restarts, and checkpoints for long-running agent systems.

Vessel Browser provides an agent-centric platform for automating web interactions and research. It supports various AI providers and offers human supervision capabilities for autonomous operations. The architecture supports both legacy and modern MCP protocols, ensuring broad compatibility with AI clients.