# agent-browser

**Category:** ☁️ Cloud Platforms  
**Repository:** https://github.com/codeChap/mcp-server-agent-browser  
**Views:** 0  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/agent-browser-2

## Description
MCP server for browser automation via Vercel's agent-browser CLI

## Claude Desktop Quick Installation
Heuristic fallback — verify the package name and runner against the repository README before running it. Uses `npx` (confidence: low):

```json
"mcpServers": {
  "agent-browser": {
    "command": "npx",
    "args": ["-y","agent-browser-2"]
  }
}
```

## Documentation & README

# mcp-server-agent-browser

> **Status: Beta** — CLI wrapper is covered by unit tests and a fake-browser stdio smoke test. Cookie restore across a real Chromium restart is still a manual check.

Let LLMs drive a real browser. This MCP server wraps [agent-browser](https://github.com/vercel-labs/agent-browser) (Vercel Labs) so any MCP client can navigate, fill forms, click, snapshot the accessibility tree, and screenshot.

It is not Grok's `web_search` / `open_page`. Those fetch documents. This one runs Chromium. Use search to find a URL, then `browser_navigate`.

## Prerequisites

```bash
cargo install agent-browser
agent-browser install
```

Call `browser_doctor` if anything is missing.

## Build

```bash
cargo build --release
```

Binary: `target/release/mcp-server-agent-browser`

```bash
cargo test
./tests/test-stdio.sh
```

Real Chromium login-restore is not in CI. After a headed login, restart the MCP process and confirm the next `browser_navigate` is still logged in.

## Configuration

MCP client (stdio):

```json
{
  "mcpServers": {
    "agent-browser": {
      "command": "/path/to/mcp-server-agent-browser"
    }
  }
}
```

Optional TOML at `~/.config/mcp-server-agent-browser/config.toml` (see `config.example.toml`). Missing file uses defaults. Override the path with `MCP_AGENT_BROWSER_CONFIG`.

| Setting | Default | Meaning |
|---|---|---|
| `headed` | `false` | Show a window. Launch-time only; `browser_close` first if a headless daemon is already up. Also `AGENT_BROWSER_HEADED=1`. |
| `persist` | `true` | Bare `--restore` per `session_id` (default session key `default`) plus `--namespace mcp-server`. |
| `keep_daemon` | `false` | If false, MCP exit runs `close` so restore state is saved and Chrome does not leak. |
| `namespace` | `mcp-server` | Isolates this MCP's daemon sockets and restore files from a human using the CLI. |
| `command_timeout_secs` | `120` | Wrapper timeout. Playwright's own 25s action timeout is left alone (CLI IPC is ~30s). |
| `idle_timeout` | `1h` | Daemon idle shutdown. Use `"0"` with `keep_daemon = true`. |
| `download_dir` | `~/Downloads` | `--download-path`. `~` is expanded. |
| `profile` | unset | Optional persistent Chrome user-data dir. Not your daily Chrome profile. |
| `encryption_key_file` | unset | Sets `AGENT_BROWSER_ENCRYPTION_KEY`. Restore files are credentials; plaintext unless this is set. |
| `AGENT_BROWSER_PATH` | `agent-browser` | CLI binary. |

`allowed_domains` is optional. Localhost is allowed unless you set a list that excludes it.

## What it can do

Same interaction set as before (navigate, click, type, snapshot, screenshot, cookies, eval, CDP, sessions), plus:

- **`browser_doctor`** — CLI, config, persist, headed/DISPLAY, daemon guess. Does not launch Chrome.
- **`browser_get_text` `pattern`** — regex over page text with two lines of context.
- **`browser_wait`** — `load` / `url` / `text` as well as a selector.

Typical loop:

1. `browser_navigate`
2. `browser_snapshot` (`-i` for interactive)
3. `browser_click` / `browser_fill` with `@ref`s
4. `browser_screenshot` if you need pixels

## Persistence

With `persist = true` (default), each session saves cookies and localStorage on close and on the CLI's autosave interval. State lives under `~/.agent-browser/`, namespaced to `mcp-server`. Isolated `session_id`s do not share a restore key.

Headed login once, `browser_close` or exit the MCP, start again. The next navigate should restore that session.

A killed MCP process may leave the daemon running. `browser_doctor` reports that. Idle shutdown still saves if persist is on.

## Limitations

- Chromium via `agent-browser` (Playwright). No search.
- Headed is ignored until the existing daemon is closed.
- Snap Chromium on Ubuntu can fail to advertise its DevTools port; prefer `agent-browser install`'s browser or `executable_path`.
- Writes (screenshot, pdf, download) must be relative, under `/tmp`, or under `download_dir`.
- 25s Playwright action timeout is an upstream CLI limit, not this wrapper.

## License

MIT