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Implements Puppeteer's page.$(selector), page.$$(selector), and element.evaluate() patterns, with error handling for missing elements and stale references.","intents":["I want to click a button or link identified by a CSS selector","I need to fill out a form by setting input values and submitting","I want to extract text or attributes from specific DOM elements"],"best_for":["Automated form submission and data entry workflows","Web scraping with precise element targeting","Testing or monitoring workflows requiring specific UI interaction"],"limitations":["Selector-based interaction is fragile — page layout changes break selectors without error recovery","No built-in retry logic for elements that appear after animations or async rendering","XPath support depends on Puppeteer version; complex XPath expressions may have performance overhead","No visual element detection — requires manual selector specification, not image-based targeting"],"requires":["Valid CSS selector or XPath expression","Element must be present in DOM (not hidden by display:none or visibility:hidden by default)","Element must be clickable/interactable (not obscured by overlays, unless handled by Puppeteer's click strategy)"],"input_types":["CSS selector string","XPath expression string","Text input value (for form filling)","Element index (for multiple matching elements)"],"output_types":["Boolean (success/failure of interaction)","String (extracted text or attribute value)","JSON object (element properties: tag, class, id, attributes)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm-puppeteer-mcp-server__cap_3","uri":"capability://image.visual.screenshot.and.visual.capture","name":"screenshot-and-visual-capture","description":"Implements MCP tools for capturing full-page or viewport screenshots as PNG/JPEG, with options for clipping to specific regions or elements. Uses Puppeteer's page.screenshot() with configurable quality, format, and clip parameters, returning base64-encoded image data for transmission via MCP.","intents":["I want to capture a screenshot of the current page state for visual verification","I need to extract a visual snapshot of a specific region or element","I want to monitor visual changes in a webpage over time"],"best_for":["Visual regression testing or monitoring workflows","LLM vision models that need to analyze page layouts or UI state","Debugging browser automation workflows by inspecting rendered output"],"limitations":["Base64 encoding adds ~33% overhead to image data size, increasing MCP message payload","Screenshots capture rendered state at a single moment — no support for video/animation capture","Clipping to elements requires element references or coordinates — no semantic region detection","Large screenshots (full-page on high-resolution displays) can exceed MCP message size limits"],"requires":["Page must be loaded and rendered","Optional: valid CSS selector or clip coordinates for region capture","Sufficient memory for image encoding (large pages may cause memory spikes)"],"input_types":["Format enum (png, jpeg)","Quality number (0-100, JPEG only)","Optional clip object (x, y, width, height)","Optional selector for element-based clipping"],"output_types":["Base64-encoded PNG or JPEG string","Image metadata (width, height, format)"],"categories":["image-visual","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm-puppeteer-mcp-server__cap_4","uri":"capability://code.generation.editing.javascript.execution.and.page.evaluation","name":"javascript-execution-and-page-evaluation","description":"Provides MCP tools for executing arbitrary JavaScript in the page context via page.evaluate(), allowing LLM agents to run custom scripts, extract computed properties, or trigger page-specific logic. Returns serialized JavaScript values (primitives, objects, arrays) with error handling for non-serializable results.","intents":["I want to extract computed CSS properties or JavaScript state from the page","I need to run custom JavaScript to interact with a single-page application","I want to check if a specific condition is true on the page (e.g., element visibility, data loaded)"],"best_for":["Advanced web scraping requiring JavaScript-based data extraction","SPA automation where standard DOM queries are insufficient","Conditional logic in browser automation workflows"],"limitations":["JavaScript execution is sandboxed to the page context — cannot access Node.js APIs or external resources","Return values must be JSON-serializable — functions, DOM nodes, and circular references cause errors","No access to browser DevTools Protocol (CDP) features like performance metrics or network interception","Timeout handling is implicit — long-running scripts may hang the page without explicit timeout"],"requires":["Valid JavaScript code as a string","Page must be loaded and ready for script execution","Return value must be JSON-serializable (primitives, objects, arrays only)"],"input_types":["JavaScript code string","Optional arguments array (passed to the script function)"],"output_types":["JSON-serializable value (string, number, boolean, object, array)","Error message if script throws or returns non-serializable value"],"categories":["code-generation-editing","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm-puppeteer-mcp-server__cap_5","uri":"capability://automation.workflow.wait.and.synchronization.primitives","name":"wait-and-synchronization-primitives","description":"Implements MCP tools for waiting on page conditions (selector visibility, navigation completion, network idle, timeout-based delays) using Puppeteer's page.waitForSelector(), page.waitForNavigation(), and page.waitForFunction(). Enables LLM agents to synchronize browser state with automation logic without polling.","intents":["I want to wait for a specific element to appear before interacting with it","I need to wait for a page navigation to complete after clicking a link","I want to wait for dynamic content to load before extracting data"],"best_for":["Automation workflows with asynchronous page updates (AJAX, WebSockets)","Scenarios requiring precise synchronization between actions and page state","Flaky test prevention by waiting for expected conditions rather than fixed delays"],"limitations":["Timeout-based waits can mask underlying issues — no diagnostic info on why condition wasn't met","waitForNavigation() can be unreliable if navigation happens before the wait is registered","No support for custom wait conditions beyond selector visibility and navigation — complex conditions require page.waitForFunction()","Waiting on network idle (networkidle0) is fragile for pages with background requests or WebSocket connections"],"requires":["Valid CSS selector (for waitForSelector) or navigation trigger","Timeout value in milliseconds (default typically 30s)","Page must be in a state where the condition is possible (e.g., element not permanently hidden)"],"input_types":["Selector string (for element wait)","Timeout in milliseconds","Optional: JavaScript function string (for custom conditions)"],"output_types":["Boolean (condition met or timeout)","Element reference or null (if selector-based wait)","Error message if timeout exceeded"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm-puppeteer-mcp-server__cap_6","uri":"capability://tool.use.integration.cookie.and.session.management","name":"cookie-and-session-management","description":"Provides MCP tools for getting, setting, and deleting cookies via page.cookies() and page.setCookie(), enabling session persistence and authentication workflows. Stores cookies in memory per browser instance or optionally persists to external storage for cross-session reuse.","intents":["I want to set authentication cookies to access protected pages","I need to persist session state across multiple page navigations","I want to clear cookies to simulate a fresh browser session"],"best_for":["Authenticated web scraping or automation workflows","Multi-step workflows requiring session persistence","Testing scenarios that need to simulate different user states"],"limitations":["Cookies are stored in memory per browser instance — no built-in persistence across server restarts","No support for cookie encryption or secure storage — sensitive tokens are visible in memory","Cannot set cookies for domains not yet visited (Puppeteer restriction) — requires navigation first","No built-in handling of cookie expiration or refresh logic"],"requires":["Cookie name, value, and domain","Page must have navigated to the target domain before setting cookies","Optional: cookie attributes (expires, httpOnly, secure, sameSite)"],"input_types":["Cookie object (name, value, domain, path, expires, httpOnly, secure, sameSite)","Cookie name (for deletion)"],"output_types":["Array of cookie objects (for get operation)","Boolean (success/failure of set/delete operation)"],"categories":["tool-use-integration","memory-knowledge"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm-puppeteer-mcp-server__cap_7","uri":"capability://tool.use.integration.mcp.server.lifecycle.and.connection.management","name":"mcp-server-lifecycle-and-connection-management","description":"Implements the MCP server protocol for browser automation, handling client connections, tool registration, and request/response serialization. Uses Node.js MCP SDK to expose Puppeteer capabilities as standardized MCP tools, with automatic browser instance creation and cleanup on client disconnect.","intents":["I want to connect my LLM client to a browser automation server via MCP protocol","I need to discover available browser automation tools from the MCP server","I want the server to clean up browser resources when my client disconnects"],"best_for":["Integrating browser automation into Claude or other MCP-compatible LLM platforms","Building multi-client systems where browser automation is a shared service","Teams standardizing on MCP for tool integration across AI applications"],"limitations":["Single browser instance per server connection — concurrent requests from the same client are serialized","No built-in load balancing or connection pooling — multiple clients require multiple server instances","MCP protocol overhead (JSON serialization, network latency) adds latency vs direct library usage","Tool discovery is static — cannot dynamically register new tools at runtime"],"requires":["MCP-compatible client (Claude, custom application with MCP SDK)","Network connectivity between client and server (stdio, HTTP, or WebSocket transport)","Node.js 14+ with MCP SDK installed"],"input_types":["MCP tool call with parameters","MCP resource request (if resources are exposed)"],"output_types":["MCP tool result (JSON-serialized response)","MCP error response (if tool execution fails)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":54,"verified":false,"data_access_risk":"high","permissions":["Node.js 14+ (Puppeteer requirement)","MCP-compatible client (Claude, custom LLM application, or MCP inspector)","Chromium/Chrome binary (auto-downloaded by Puppeteer on first run, ~150-300MB)","Valid URL (http/https)","Network connectivity from the server to the target domain","Timeout configuration (default typically 30s, configurable per request)","Valid CSS selector or XPath expression","Element must be present in DOM (not hidden by display:none or visibility:hidden by default)","Element must be clickable/interactable (not obscured by overlays, unless handled by Puppeteer's click strategy)","Page must be loaded and rendered"],"failure_modes":["Headless-only execution — no native support for rendering visual interactions in real browsers","Single browser instance per server connection — concurrent requests require connection pooling or multiple server instances","Network latency between MCP client and server adds overhead compared to direct Puppeteer library usage","Limited to Puppeteer's supported browser versions (Chromium-based only, no Firefox/Safari support)","Wait conditions (networkidle) can timeout on slow or continuously-loading pages (e.g., infinite scroll, WebSocket streams)","JavaScript-heavy SPAs may require explicit wait-for-selector or wait-for-navigation calls beyond standard load events","No built-in handling for authentication or cookie persistence across navigation calls","Selector-based interaction is fragile — page layout changes break selectors without error recovery","No built-in retry logic for elements that appear after animations or async rendering","XPath support depends on Puppeteer version; complex XPath expressions may have performance overhead","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.28123988473266254,"quality":0.41,"ecosystem":0.39999999999999997,"match_graph":0.25,"freshness":0.52,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.15,"match_graph":0.23,"freshness":0.12}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-05-24T12:16:23.902Z","last_scraped_at":"2026-05-03T14:04:47.472Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":1274,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=puppeteer-mcp-server","compare_url":"https://unfragile.ai/compare?artifact=puppeteer-mcp-server"}},"signature":"TDZpA/2oZXeQlM29zX0oRw1knRpgeCA1BthR8Nzcv4V20y20oRuaSSAaMteEJViKq4FoqIyl/QCFLWQu6He1BQ==","signedAt":"2026-06-23T14:42:50.095Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/puppeteer-mcp-server","artifact":"https://unfragile.ai/puppeteer-mcp-server","verify":"https://unfragile.ai/api/v1/verify?slug=puppeteer-mcp-server","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}