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Implements MCP resource and tool handlers that translate client requests into Puppeteer API calls, managing browser lifecycle and page state across multiple tool invocations within a single server session.","intents":["I want Claude to automate web scraping tasks by controlling a real browser","I need to let an AI agent navigate websites and extract data from dynamic content","I want to enable browser automation without writing custom API wrappers for each tool"],"best_for":["AI developers building Claude-powered web automation agents","Teams integrating browser automation into MCP-compatible LLM workflows","Researchers prototyping AI-driven web interaction systems"],"limitations":["Experimental implementation — not production-hardened; error handling and edge cases may be incomplete","Single browser instance per server — concurrent requests from multiple clients may cause state conflicts","No built-in session persistence — browser state is lost if server restarts","Puppeteer overhead adds 500ms-2s per page load; not suitable for high-frequency scraping","Limited to Chrome/Chromium; no Firefox or Safari support via Puppeteer"],"requires":["Node.js 14.0+","Puppeteer 10.0+ (installed as peer dependency)","MCP client implementation (e.g., Claude desktop app with MCP support)","Chrome or Chromium binary (Puppeteer downloads by default)"],"input_types":["MCP tool call with URL string","MCP tool call with CSS/XPath selectors","MCP tool call with keyboard/mouse event parameters"],"output_types":["HTML/DOM content as text","Screenshot as base64-encoded image","Structured JSON from page evaluation","Navigation status and error messages"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mseeppuppeteer-mcp-server__cap_1","uri":"capability://automation.workflow.page.navigation.and.content.retrieval","name":"page-navigation-and-content-retrieval","description":"Implements MCP tools for navigating to URLs, waiting for page load conditions, and retrieving rendered HTML/text content from the current page. Uses Puppeteer's page.goto(), page.waitForNavigation(), and page.content() methods, with configurable timeout and waitUntil options to handle dynamic content loading and JavaScript-heavy sites.","intents":["I want the AI to navigate to a URL and wait for the page to fully load before extracting data","I need to retrieve the rendered HTML of a page (not just raw HTML from the server)","I want to handle pages with dynamic content that loads after initial page render"],"best_for":["Web scraping workflows where JavaScript execution is required","AI agents that need to interact with modern single-page applications (SPAs)","Scenarios requiring full DOM rendering before content extraction"],"limitations":["waitUntil options (networkidle0, networkidle2, domcontentloaded) may timeout on sites with continuous background requests","No built-in handling for infinite scroll or lazy-loaded content — requires additional evaluate() calls","Page.goto() timeout is fixed at Puppeteer default (30s) — not configurable per request in this implementation","Retrieving full page content for very large DOMs (>100MB) may cause memory pressure"],"requires":["Active Puppeteer browser instance","Valid URL string (http/https)","Network connectivity to target domain"],"input_types":["URL string","waitUntil option string (networkidle0, networkidle2, domcontentloaded, load)"],"output_types":["HTML string (full page markup)","Plain text (page.innerText equivalent)","Navigation status object with timing metadata"],"categories":["automation-workflow","search-retrieval"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mseeppuppeteer-mcp-server__cap_2","uri":"capability://automation.workflow.dom.element.interaction.via.selectors","name":"dom-element-interaction-via-selectors","description":"Provides MCP tools for clicking, typing, and hovering on DOM elements using CSS selectors or XPath expressions. Implements Puppeteer's page.click(), page.type(), and page.hover() methods with selector resolution, automatic element visibility checks, and error handling for missing or non-interactive elements. Supports waiting for elements to appear before interaction.","intents":["I want the AI to click buttons, links, or form elements on a page","I need to fill out forms by typing text into input fields","I want to trigger hover effects or other mouse interactions on specific elements"],"best_for":["Form automation and data entry workflows","Testing AI agents that need to navigate complex web UIs","Web scraping scenarios requiring user interaction (login, pagination, filters)"],"limitations":["Selector-based interaction fails silently if element is not found — no built-in retry logic","No support for shadow DOM or iframe-nested elements without additional evaluate() calls","Typing speed is fixed (Puppeteer default ~100ms per keystroke) — cannot simulate rapid typing","Hover interactions don't trigger all CSS pseudo-classes (e.g., :focus-visible) reliably","No built-in handling for elements that move or change position during interaction"],"requires":["Active Puppeteer page instance","Valid CSS selector or XPath expression","Element must be in viewport or scrollable into view"],"input_types":["CSS selector string","XPath expression string","Text to type (for type action)","Optional delay parameter (milliseconds)"],"output_types":["Success/failure status","Error message if element not found","Timing metadata (interaction duration)"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mseeppuppeteer-mcp-server__cap_3","uri":"capability://code.generation.editing.page.evaluation.and.javascript.execution","name":"page-evaluation-and-javascript-execution","description":"Exposes Puppeteer's page.evaluate() and page.evaluateHandle() methods as MCP tools, allowing Claude to execute arbitrary JavaScript code in the browser context and retrieve results. Supports passing arguments to the JavaScript function, returning serializable values (strings, numbers, objects, arrays), and accessing the DOM programmatically without selector-based interaction.","intents":["I want to extract complex data from the page by running custom JavaScript logic","I need to check the current state of JavaScript variables or application state","I want to trigger custom events or call page-specific JavaScript functions"],"best_for":["Advanced web scraping requiring custom data transformation logic","Debugging and inspecting JavaScript application state","Extracting data from complex or dynamically-structured pages"],"limitations":["Only serializable return values are supported — functions, DOM nodes, and circular references will fail","No access to Node.js modules or server-side code from within evaluate() context","JavaScript execution timeout is fixed at Puppeteer default (30s) — long-running scripts will fail","Errors in evaluated JavaScript are not always clearly reported back to the client","No built-in sandboxing — malicious JavaScript in the page can interfere with evaluation"],"requires":["Active Puppeteer page instance","Valid JavaScript function or code string","Arguments must be serializable (JSON-compatible types)"],"input_types":["JavaScript function code as string","Optional arguments array (serializable values)","Optional timeout in milliseconds"],"output_types":["Serialized return value (JSON-compatible)","Error message if evaluation fails","Execution timing metadata"],"categories":["code-generation-editing","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mseeppuppeteer-mcp-server__cap_4","uri":"capability://image.visual.screenshot.and.visual.capture","name":"screenshot-and-visual-capture","description":"Implements MCP tools for capturing screenshots of the current page or specific elements using Puppeteer's page.screenshot() and elementHandle.screenshot() methods. Returns images as base64-encoded strings or file paths, with configurable options for full-page capture, viewport-only capture, and element-specific screenshots. Supports PNG and JPEG formats.","intents":["I want the AI to take a screenshot of the current page state for visual inspection","I need to capture a specific element or region of the page","I want to verify that a page rendered correctly before proceeding with further automation"],"best_for":["Visual verification in automated testing workflows","Debugging AI agent behavior by inspecting page state visually","Creating visual records of web scraping results"],"limitations":["Full-page screenshots of very tall pages (>10000px) may cause memory issues or timeout","Screenshots are rendered at the current viewport size — responsive design may not be captured accurately","Element screenshots fail if element is not visible or is outside viewport","Base64 encoding adds ~33% overhead to image size; large screenshots may exceed MCP message limits","No built-in image compression or quality tuning — JPEG quality is fixed"],"requires":["Active Puppeteer page instance","Page must be rendered (navigation must be complete)","Optional: element handle for element-specific screenshots"],"input_types":["Screenshot type (fullPage, viewport, element)","Optional format (png, jpeg)","Optional JPEG quality (0-100)","Optional clip region (x, y, width, height)"],"output_types":["Base64-encoded image string","Image file path (if saved to disk)","Image metadata (width, height, format)"],"categories":["image-visual","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mseeppuppeteer-mcp-server__cap_5","uri":"capability://automation.workflow.browser.session.and.state.management","name":"browser-session-and-state-management","description":"Manages the lifecycle of a single Puppeteer browser instance and page state across multiple MCP tool invocations. Implements initialization of the browser on server startup, page creation/reuse, and cleanup on server shutdown. Maintains browser context (cookies, local storage, session state) across tool calls, allowing Claude to perform multi-step workflows without losing authentication or page state.","intents":["I want the AI to maintain browser state across multiple interactions (e.g., stay logged in)","I need to reuse the same browser instance for multiple sequential tasks","I want the browser to clean up resources properly when the server shuts down"],"best_for":["Multi-step automation workflows requiring persistent authentication","Long-running AI agents that perform multiple tasks in sequence","Scenarios where browser startup overhead needs to be amortized across many operations"],"limitations":["Single browser instance per server — no isolation between concurrent clients; state conflicts possible","No built-in session persistence — browser state is lost on server restart","No explicit session management API — Claude cannot create isolated browser contexts","Memory leaks possible if pages are not properly closed between tasks","No built-in cookie/storage management — clearing state requires manual evaluate() calls"],"requires":["Node.js process with sufficient memory (Puppeteer typically uses 100-300MB per browser)","Chrome/Chromium binary available (Puppeteer downloads by default)","MCP server initialization and shutdown hooks"],"input_types":["MCP initialization parameters (optional: browser launch options)"],"output_types":["Browser instance handle (internal)","Page instance handle (internal)","Status messages on initialization/shutdown"],"categories":["automation-workflow","memory-knowledge"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mseeppuppeteer-mcp-server__cap_6","uri":"capability://tool.use.integration.mcp.protocol.tool.schema.mapping","name":"mcp-protocol-tool-schema-mapping","description":"Implements the MCP server protocol layer that translates between Claude's tool-calling interface and Puppeteer API calls. Defines MCP tool schemas (name, description, input schema) for each Puppeteer capability, handles tool invocation requests from the MCP client, marshals arguments, executes Puppeteer methods, and returns results in MCP-compliant format. Uses JSON Schema for input validation and type safety.","intents":["I want Claude to understand what browser automation tools are available and their parameters","I need the MCP server to validate tool inputs before executing Puppeteer methods","I want clear error messages when Claude calls tools with invalid parameters"],"best_for":["MCP client developers integrating this server into their applications","Teams building Claude-powered automation agents that need type-safe tool calling","Developers extending the server with additional Puppeteer capabilities"],"limitations":["Tool schemas are static — cannot be dynamically generated based on page content or runtime state","No support for tool dependencies or conditional tool availability","Input validation is JSON Schema only — complex validation logic must be in tool handlers","Error messages from Puppeteer are passed through as-is; may not be user-friendly","No built-in rate limiting or quota management for tool invocations"],"requires":["MCP client implementation (e.g., Claude desktop app)","JSON Schema knowledge for understanding tool input schemas","Node.js MCP SDK or compatible server implementation"],"input_types":["MCP tool call request (JSON)","Tool name string","Tool arguments object (validated against JSON Schema)"],"output_types":["MCP tool result response (JSON)","Tool output (varies by tool)","Error response with error code and message"],"categories":["tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"npm_npm-mseeppuppeteer-mcp-server__cap_7","uri":"capability://automation.workflow.error.handling.and.resilience","name":"error-handling-and-resilience","description":"Implements error handling for Puppeteer failures (navigation timeouts, element not found, JavaScript errors) and translates them into MCP error responses. Includes basic retry logic for transient failures (network timeouts), timeout configuration, and error message formatting for Claude to understand what went wrong. Does not include advanced resilience patterns like circuit breakers or exponential backoff.","intents":["I want the AI to understand when a browser operation fails and why","I need clear error messages so Claude can decide whether to retry or take an alternative action","I want the server to handle transient failures gracefully without crashing"],"best_for":["Production-adjacent automation workflows where reliability is important","Debugging AI agent behavior when browser operations fail","Scenarios where Claude needs to make decisions based on failure reasons"],"limitations":["Retry logic is basic — no exponential backoff or jitter; may hammer failing services","No circuit breaker pattern — repeated failures don't prevent subsequent attempts","Timeout values are fixed — not configurable per tool invocation","Error messages are Puppeteer's raw error strings — may be cryptic or inconsistent","No built-in logging or observability — failures are only visible through MCP error responses","No distinction between retryable and non-retryable errors"],"requires":["Active Puppeteer browser instance","Network connectivity (for transient failure detection)"],"input_types":["Tool invocation that may fail"],"output_types":["MCP error response with error code and message","Optional: retry metadata (attempt count, next retry time)"],"categories":["automation-workflow","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":29,"verified":false,"data_access_risk":"high","permissions":["Node.js 14.0+","Puppeteer 10.0+ (installed as peer dependency)","MCP client implementation (e.g., Claude desktop app with MCP support)","Chrome or Chromium binary (Puppeteer downloads by default)","Active Puppeteer browser instance","Valid URL string (http/https)","Network connectivity to target domain","Active Puppeteer page instance","Valid CSS selector or XPath expression","Element must be in viewport or scrollable into view"],"failure_modes":["Experimental implementation — not production-hardened; error handling and edge cases may be incomplete","Single browser instance per server — concurrent requests from multiple clients may cause state conflicts","No built-in session persistence — browser state is lost if server restarts","Puppeteer overhead adds 500ms-2s per page load; not suitable for high-frequency scraping","Limited to Chrome/Chromium; no Firefox or Safari support via Puppeteer","waitUntil options (networkidle0, networkidle2, domcontentloaded) may timeout on sites with continuous background requests","No built-in handling for infinite scroll or lazy-loaded content — requires additional evaluate() calls","Page.goto() timeout is fixed at Puppeteer default (30s) — not configurable per request in this implementation","Retrieving full page content for very large DOMs (>100MB) may cause memory pressure","Selector-based interaction fails silently if element is not found — no built-in retry logic","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.05,"quality":0.41,"ecosystem":0.36,"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":"2026-05-24T12:16:23.904Z","last_scraped_at":"2026-05-03T14:23:46.467Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=npm-mseeppuppeteer-mcp-server","compare_url":"https://unfragile.ai/compare?artifact=npm-mseeppuppeteer-mcp-server"}},"signature":"202rEEz4tjnf19tzEUjryIqTulVkUqEqy21MEmPly6mt6ZTTk1IIO9MQa5GbZoYPU4NKz/GMuRnBOd7d8so6Bw==","signedAt":"2026-06-21T03:11:51.527Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/npm-mseeppuppeteer-mcp-server","artifact":"https://unfragile.ai/npm-mseeppuppeteer-mcp-server","verify":"https://unfragile.ai/api/v1/verify?slug=npm-mseeppuppeteer-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"}}