Cognitive Browser

Cognitive Browser

105-tool browser automation with cognitive user simulation, visual testing, persona system, and site knowledge. Rate limited (50 req/hr). Free for evaluation

Quick Start

# Connect this server (installs CLI if needed)
npx -y smithery mcp add alexandria-shai-eden/cbrowser

# Browse available tools
npx -y smithery tool list alexandria-shai-eden/cbrowser

# Get full schema for a tool
npx -y smithery tool get alexandria-shai-eden/cbrowser navigate

# Call a tool
npx -y smithery tool call alexandria-shai-eden/cbrowser navigate '{}'

Direct MCP Connection

Endpoint: https://cbrowser.run.tools

Tools (105)

• navigate — Navigate to a URL and take a screenshot. Pass _browserToken from a previous tool call to reuse the same browser session.
• click — Click an element on the page. MUST pass _browserToken from previous tool call to click on the same page. Without it, cl…
• smart_click — Click with auto-retry and self-healing selectors. v11.8.0: Added confidence gating - only reports success if healed sel…
• dismiss_overlay — Detect and dismiss modal overlays (cookie consent, age verification, newsletter popups). Constitutional Yellow zone.
• fill — Fill a form field with text. MUST pass _browserToken from previous tool call to interact with the same page.
• scroll — Scroll the page. MUST pass _browserToken from previous tool call to scroll the same page.
• screenshot — Take a screenshot of the current page. IMPORTANT: If you received a _browserToken from a previous tool call (navigate, …
• extract — Extract data from the page. Pass _browserToken to use the same browser session.
• assert — Assert a condition using natural language
• analyze_page — Analyze page structure for forms, buttons, links
• generate_tests — Generate test scenarios for a page
• find_element_by_intent — AI-powered semantic element finding with ARIA-first selector strategy. Prioritizes aria-label > role > semantic HTML > …
• ai_benchmark — Compare AI-friendliness across competitor sites. Runs agent-ready audits on each URL, ranks by AI readiness grade, and …
• save_session — Save browser session (cookies, storage) for later use
• load_session — Load a previously saved session
• list_sessions — List all saved sessions with metadata (name, domain, cookies count, localStorage keys, created date, size)
• delete_session — Delete a saved session by name
• heal_stats — Get self-healing selector cache statistics
• visual_baseline — Capture a visual baseline using Wasserstein barycenter. Takes multiple screenshots, rejects outliers, computes optimal …
• visual_regression — Run visual regression test against a baseline. Automatically uses smart regression (Wasserstein) if a smart baseline ex…
• cross_browser_test — Test page rendering across multiple browsers
• cross_browser_diff — Quick diff of page metrics across browsers
• responsive_test — Test page across different viewport sizes
• ab_comparison — Compare two URLs visually (staging vs production)
• transport_map — Generate a Visual Transport Map showing WHERE visual content moved between two screenshots. Produces heatmap, flow arro…
• attention_analysis — Analyze where a persona's visual attention goes on a page using Wasserstein saliency. Produces attention alignment, ent…
• attention_compare — Compare attention patterns between two personas on the same page. Shows where they look differently and the Wasserstein…
• nl_test_file — Run natural language test suite from a file. Returns step-level results with enriched error info, partial matches, and …
• nl_test_inline — Run natural language tests from inline content. Returns step-level results with enriched error info, partial matches, a…
• repair_test — AI-powered test repair for broken tests
• detect_flaky_tests — Detect flaky/unreliable tests by running multiple times
• coverage_map — Generate test coverage map for a site
• hunt_bugs — Autonomous bug hunting - crawl and find issues. Returns bugs with severity, selector, and actionable recommendation for…
• chaos_test — Inject failures and test resilience
• compare_personas — Compare how different user personas experience a journey. In Claude Code sessions (no API key), use compare_personas_in…
• compare_personas_init — Initialize persona comparison for Claude Code bridge workflow. Returns persona profiles and instructions for running jo…
• compare_personas_complete — Complete persona comparison by aggregating journey results. Call this after running all persona journeys via the bridge…
• cognitive_distance — Compute the Wasserstein cognitive distance between two personas. Returns W₁ distance (true cognitive distance), per-tra…
• cognitive_coverage — Select the N most cognitively different personas from a list for maximum test coverage. Uses greedy farthest-point samp…
• cognitive_interpolate — Generate an interpolated persona between two known personas using Wasserstein geodesic. Preserves trait coupling struct…
• cognitive_load_estimate — Estimate cognitive load for a specific persona on page metrics. Returns per-dimension breakdown (information, visual, a…
• cognitive_journey_init — Initialize a cognitive user journey simulation. Returns the persona's cognitive profile, initial state, and abandonment…
• cognitive_journey_update_state — Update the cognitive state during a journey simulation. Call this after each action to track mental state.
• list_cognitive_personas — List all available personas with their cognitive traits (includes accessibility and emotional personas)
• persona_values_list — List all Schwartz's 10 Universal Values with their meanings, plus higher-order values, Self-Determination Theory needs,…
• persona_values_lookup — Look up the values profile for a persona (Schwartz's 10 Universal Values, SDT needs, Maslow level). Values describe WHO…
• list_influence_patterns — List research-backed behavioral persuasion patterns (Cialdini, Kahneman) and which persona values correlate with suscep…
• persona_questionnaire_get — Get the persona questionnaire for building a custom persona. Returns research-backed questions that map to cognitive tr…
• persona_questionnaire_build — Build a custom persona from questionnaire answers with category-aware value safeguards. Answers should be a map of trai…
• persona_trait_lookup — Look up behavioral descriptions for specific trait values. Useful for understanding what a trait value means in practic…
• persona_category_guidance — Get guidance for value assignment based on persona category. (v16.12.0) Explains research basis for why cognitive, phys…
• perf_baseline — Capture performance baseline for a URL
• perf_regression — Detect performance regression against baseline with configurable sensitivity. Uses dual thresholds: both percentage AND…
• list_baselines — List all saved baselines (visual and performance)
• agent_ready_audit — Audit a website for AI-agent friendliness. Analyzes findability, stability, accessibility, and semantics. Returns score…
• competitive_benchmark — Compare UX across competitor sites. Runs identical cognitive journeys on multiple sites and generates head-to-head comp…
• empathy_audit — Simulate how real users experience a site. Accepts ANY persona — disability personas get specialized barrier detection,…
• webmcp_ready_audit — Audit an MCP server for Claude in Chrome / WebMCP compatibility. Uses 6-tier evaluation: Server Implementation (25%), T…
• status — Get CBrowser environment status and diagnostics including data directories, installed browsers, configuration, self-hea…
• browser_health — Check if the browser is healthy and responsive. Use this before operations if you suspect the browser may have crashed.
• browser_recover — Attempt to recover from a browser crash by restarting the browser process. Use this when browser_health returns unhealt…

*Response truncated. Use npx -y smithery for complete data.*