Parallel Browser Mcp

What is Parallel Browser Mcp?

Parallel Browser Mcp is an MCP server for parallel browser automation. It exposes a numeric session model so one client can create and control multiple browser sessions simultaneously across several providers: local Playwright Chromium, Browserbase, Anchor Browser, and Cloudflare Browser Run. It is designed for developers building AI-driven browser automation workflows within MCP‑compatible clients.

How to use Parallel Browser Mcp?

Install via npm (npx parallel-browser-mcp@latest) and add the server configuration to your MCP client (e.g., Claude, Cursor, VS Code). The server runs over stdio. Create sessions by calling start_session with a provider, then use any browser_* tool by passing the returned numeric sessionId. Provider credentials and defaults are set in environment variables or a JSON config object.

Key features of Parallel Browser Mcp

• Multiple concurrent browser sessions with numeric IDs in memory
• Unified provider abstraction for Playwright, Browserbase, Anchor, and Cloudflare
• Session management tools: start, close, close all, list sessions
• Over 20 browser automation tools (navigate, click, fill, screenshot, and more)
• Configuration via environment variables, config file, or inline JSON

Use cases of Parallel Browser Mcp

• Run multiple browser-based agents in parallel from a single MCP client
• Automate web scraping and form filling across different browser providers
• AI agents that need to manipulate several pages concurrently (e.g., research, data extraction)
• Test browser automation scripts locally with Playwright and switch to cloud providers

FAQ from Parallel Browser Mcp

Which providers does Parallel Browser Mcp support?

It supports four providers: Playwright (local Chromium), Browserbase (via @browserbasehq/sdk), Anchor (via anchorbrowser), and Cloudflare (via Cloudflare Browser Run).

How do I configure provider credentials?

Credentials are set via environment variables: BROWSERBASE_API_KEY, ANCHOR_API_KEY, CLOUDFLARE_API_TOKEN, and CLOUDFLARE_ACCOUNT_ID. Playwright requires no credentials. Additional provider‑specific options can be set in a JSON configuration provided through BROWSER_MCP_CONFIG or a config file.

How do I run the server?

You can run it locally with node dist/index.js after building, or use the npm CLI: npx parallel-browser-mcp@latest. The server communicates over stdio, so it integrates with any MCP client that supports stdio transport.

What tools are available for controlling a session?

The server offers session tools (start_session, close_session, close_all_sessions, get_sessions) and browser tools such as browser_navigate, browser_click, browser_fill, browser_screenshot, browser_snapshot, browser_evaluate, and more—over 20 in total.

How do I start and use a session?

Call start_session with a provider name (e.g., "playwright"). The response includes a numeric session ID. Then call any browser_* tool with { "sessionId": <id>, ...}. Finally, call close_session to release resources.