Hosting

Local stdio process

Transport

stdio

Endpoint

Local process; no hosted endpoint documented

Authentication

No credentials were configured; the tested read-only tool “session_list” succeeded in an isolated environment. Other tools may have additional requirements.

Requirements

• Node.js 18+
• The npm package repository matched the repository linked from the public profile.

Setup steps

1. npx -y leapfrog@0.2.0

The server returned 19 tools in tools/list. Only “session_list” was invoked with a synthetic read-only input and succeeded.

• session_create

  Create a new isolated browser session with its own cookies and state. Returns a short session ID (e.g. s_k3m7x1) to pass to all other tools. Each session is a separate BrowserContext — no cookie leakage between sessions. Pool limit: 15 concurrent sessions.

  Parameters: profilePath, viewport, userAgent
  01
• session_list

  List all active browser sessions with their URLs and idle times.

  02
• session_destroy

  Close and clean up a browser session. Frees a pool slot.

  Parameters: sessionId
  03
• session_save_profile

  Save a session's cookies and auth state to disk. Use this after logging in to a site so future sessions can restore that login. Pass the returned profile path to session_create's profilePath to reuse it.

  Parameters: sessionId, name
  04
• session_list_profiles

  List all saved authentication profiles.

  05
• navigate

  Navigate to a URL and return a compact accessibility snapshot with @eN refs. Refs like @e1, @e2 can be passed directly to the 'act' tool — no CSS selectors needed. Snapshots are ~200-500 tokens (vs 15,000 with Playwright MCP).

  Parameters: sessionId, url, waitUntil
  06
• snapshot

  Re-snapshot the current page for fresh @eN refs. Use after 'act' when you need to re-orient, or scope to a region with 'selector'. Use 'selector' to dramatically reduce tokens (e.g. 'form', '#results').

  Parameters: sessionId, selector, maxChars
  07
• act

  Perform a browser interaction: click, fill, type, check, select, press key, scroll, hover, back, forward. Use @eN refs from navigate/snapshot as the target (e.g. '@e2'). CSS selectors also work. Returns a fresh snapshot if the page navigated, or just the action result if it didn't.

  Parameters: sessionId, action, target, value, key, scrollDirection, scrollAmount
  08
• screenshot

  Capture a screenshot of the current page. Returns the image inline.

  Parameters: sessionId, fullPage, selector
  09
• extract

  Extract data from the page without a full snapshot. Types: text (visible text), html (markup), title, url, js (evaluate JavaScript). Use target with @eN or CSS selector for element-specific extraction.

  Parameters: sessionId, type, target, js, maxChars
  10
• pool_status

  Show pool stats, resource usage (memory, uptime), and all active session summaries.

  11
• network_log

  View captured HTTP requests/responses for a session. Shows method, status, URL, size, and timing. Filter by URL pattern, method, status range, or content-type. Network capture starts automatically when a session is created.

  Parameters: sessionId, urlPattern, method, statusMin, statusMax, contentType
  12
• console_log

  View captured browser console messages (log, warn, error, info, debug). Console capture starts automatically when a session is created. Use level filter to focus on errors or warnings.

  Parameters: sessionId, level
  13
• network_intercept

  Add or remove network intercept rules. Block requests (ads, trackers), mock API responses, or log specific traffic. Use action='remove' with ruleId to remove an existing rule.

  Parameters: sessionId, action, ruleId, urlPattern, mockStatus, mockBody, mockContentType
  14
• wait_for

  Wait for a condition before proceeding. Supports: element visible, text appears, network idle, URL navigation, JS expression truthy. Returns a fresh snapshot after the wait completes.

  Parameters: sessionId, condition, target, text, js, timeout
  15
• tabs_list

  List all open tabs in a session. Shows index, URL, title, and which tab is active. New tabs (popups, OAuth windows) are automatically tracked.

  Parameters: sessionId
  16
• tab_switch

  Switch to a different tab by index. Use -1 to switch to the most recently opened tab (useful for popups). Returns a snapshot of the newly active tab.

  Parameters: sessionId, tabIndex
  17
• tab_close

  Close a tab by index. Defaults to the active tab. Cannot close the last remaining tab. Returns a snapshot of the new active tab.

  Parameters: sessionId, tabIndex
  18
• session_health

  Check if a session is healthy (browser connected, page responsive). Omit sessionId to check all sessions. Quick diagnostic for debugging.

  Parameters: sessionId
  19

This server’s available tools can vary by account, permissions, or configuration. The list shown is not its full runtime catalog.

• Runtime verification covered one read-only tool call (session_list); other listed tools were not individually exercised.

• MCP.Directory public profile

  Name, description, publisher identifier, categories, transport, tool inventory, and install configuration.

• Linked publisher repository

  Repository URL linked from the public profile; npm package repository metadata matched this GitHub repository.

• npm registry metadata

  Published package version 0.2.0 checked before launch. Registry repository: git+https://github.com/anthonybono21-cloud/leapfrog.git.

Documentation checked 2026-10-28T00:00:00Z. Connection has not been runtime tested.