Browserbase

Exposes browser automation capabilities through the Model Context Protocol (MCP) standard, allowing LLM agents and tools to invoke headless browser operations (navigation, interaction, extraction) as remote procedure calls. Browserbase manages browser lifecycle, session state, and resource pooling in the cloud, abstracting away infrastructure complexity while maintaining stateful browser context across multiple tool invocations within a single agent session.

Maintains browser session state across multiple sequential navigation and interaction commands, preserving cookies, local storage, authentication tokens, and DOM state between tool invocations. The MCP server manages session IDs and routes subsequent requests to the same browser instance, enabling multi-step workflows where later actions depend on earlier page states (e.g., authenticated navigation after login).

Supports multiple element targeting strategies (CSS selectors, XPath, text matching, accessibility labels) and executes interactions (click, type, submit, hover, scroll) with built-in waits for element visibility and interactability. The MCP server translates high-level interaction intents into Playwright commands with automatic retry logic and stale element detection, handling common web automation challenges (dynamic content, lazy loading, overlays) transparently.

Captures full-page or viewport screenshots at any point in the automation workflow, returning images in PNG or JPEG format. Screenshots can be taken before/after interactions to verify page state changes, and are useful for debugging agent decisions or providing visual context to multi-modal LLMs. The MCP server handles screenshot rendering, compression, and encoding transparently.

Executes arbitrary JavaScript code within the browser context, enabling agents to perform custom DOM queries, trigger events, manipulate page state, or extract data using client-side logic. The MCP server evaluates JavaScript in the page's context and returns serialized results (JSON, primitives, or stringified objects). Useful for interacting with complex frameworks or extracting data that requires computation.

Extracts data from the DOM using CSS selectors or XPath expressions, returning structured results (text content, attributes, HTML) for multiple matching elements. The MCP server evaluates selectors against the current DOM and returns results as JSON arrays or objects, enabling agents to parse tables, lists, product information, or other structured content without manual DOM traversal.

Polls for specific page conditions (element visibility, text presence, URL change, network idle) with configurable timeout and polling interval. The MCP server repeatedly evaluates the condition until it becomes true or the timeout expires, blocking the agent until the condition is satisfied. Enables agents to synchronize with asynchronous page behavior (AJAX requests, animations, lazy loading) without explicit sleep commands.

Fills form fields with text, selects dropdown options, checks/unchecks checkboxes, and submits forms with built-in validation and error handling. The MCP server maps high-level form operations to low-level DOM interactions, handling common form patterns (required fields, validation messages, multi-step forms) transparently. Includes automatic detection of form submission success/failure and navigation state changes.

Manages multiple browser tabs and navigates between them, or switches context to interact with content within iframes. The MCP server tracks open tabs/windows and routes subsequent commands to the specified context. Enables agents to handle workflows that involve opening new tabs (e.g., clicking a link with target='_blank') or interacting with embedded content.

Intercepts HTTP requests and responses, enabling agents to inspect network traffic, modify request/response headers, or block specific requests. The MCP server uses Playwright's request interception to provide visibility into network behavior and control over network-level interactions. Useful for debugging, performance analysis, or bypassing certain network requests.