Chrome Extension Downloader

What Chrome Extension Downloader does

Chrome Extension Downloader exposes collected Chrome extension research data through a remote MCP endpoint. Agents can search for extensions, retrieve store metadata, compare up to four extensions, inspect permissions, review stored review content, and examine saved ranking and growth data.

The service is suited to market research, extension evaluation, review analysis, and monitoring changes over time. Its rankings are based on the service's saved data and should not be treated as official Chrome Web Store rankings or keyword-search positions.

How it works

The extension_search tool finds extensions by name, description, or category and returns identifiers for use with detail and analysis tools. extension_get retrieves collected metadata, while extension_compare places up to four extensions side by side using fields such as users, stars, rating counts, versions, permissions, and recent permission changes.

Historical analysis is split across several tools. extension_trends returns user-count and rating history with current values and deltas. extension_rank_history follows an extension's saved overall or category ranking, and extension_rankings reads the leaderboard for a selected date. extension_top browses current leaders, while extension_trending reads saved growth rankings for selected time windows.

Review tools distinguish between stored review content and aggregate store ratings. extension_reviews returns original reviews for one extension, and extension_reviews_search searches across extensions with combined field filters. extension_review_summary reads an existing published AI summary rather than generating one. Review statistics and distributions come from extension_review_insights, while extension_review_history groups retained reviews by publication date, star rating, and version.

extension_safety reports permission capabilities, observed permission changes, and heuristic store risk signals. It provides evidence and may be incomplete; it is not a malware scan or a safety guarantee. extension_source_search searches Manifest metadata, permission names, host patterns, descriptions, and archived source-file paths, but does not perform JavaScript full-text search or download source.

Setup and configuration

Connect an MCP client to the remote endpoint at https://extensiondownloader.com/mcp. Anonymous access provides limited previews. Supply an API key when the workflow needs full metadata, additional ranking or sorting options, pagination, or other key-gated data access.

The extension_api_usage tool reports daily REST/MCP usage and remaining account allowance for the active key. It requires an API key, does not consume data quota, and remains available after the daily data quota is exhausted, subject to account minute limits.

Tools and capabilities

• Search extensions and obtain identifiers for follow-up requests.
• Retrieve basic or full collected store metadata.
• Compare extension users, ratings, versions, permissions, and permission changes.
• Analyze user and rating trends, saved rankings, and growth lists.
• Read original reviews, cross-extension review matches, summaries, statistics, and history.
• Inspect permissions, host patterns, Manifest metadata, and heuristic risk evidence.

Limitations and notes

Missing historical days, ranking entries, comparison data, or review statistics are not automatically interpreted as zero. Some tools return retained or reconstructed data rather than complete store history. Review summaries are only available when an existing summary has been published, and missing translations may be returned in English.

The service does not provide official Chrome Web Store keyword positions, malware probabilities, guaranteed safety assessments, code-similarity detection, source downloads, or full-text JavaScript search. Unknown extension identifiers return a not-found result rather than initiating a crawl, and requests do not rebuild saved rankings.