# Chrome Extension Downloader [Health: Active]

**Category:** 💻 Developer Tools  
**Repository:** https://extensiondownloader.com/mcp  
**Views:** 2  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/chrome-extension-downloader

## Description
Remote MCP access to Chrome extension data for research: compare extensions, explore reviews and historical trends, and inspect permissions. Limited previews are anonymous; full features require an API key.

## Tools
Capabilities this server exposes over MCP:

- **extension_search** — Find extensions by name, description or category name. Returns metadata and pagination, ordered by user count. Use returned IDs for detail and analysis tools; not Chrome Web Store keyword search positions.
- **extension_get** — Get collected store metadata for one extension, including users, ratings and version. Free without a key for basic metadata only; a key returns the full metadata record. Unknown IDs return not found, never trigger a crawl.
- **extension_trends** — Read one extension's user-count, store rating-count and average-star history with current metrics and deltas. Use for time-series analysis, not keyword ranks. Missing days are not zero values.
- **extension_rank_history** — Track one extension's position in our overall and category user-count rankings. Returns per-scope history, not official store or keyword search positions. Untracked ranks may be missing.
- **extension_safety** — Inspect permission capabilities, observed permission changes and heuristic store risk signals. Reports evidence and incomplete assessments; not a malware scan, malware probability or safety guarantee.
- **extension_compare** — Compare up to four extensions side by side: users, stars, rating counts, versions, permissions and recent permission changes. For historical comparisons, call extension_trends for each ID; this is not code-similarity detection.
- **extension_top** — Browse extensions ranked by current users, average stars or store rating count. Free without a key for the first 10 by users only; omit arguments for that preview. Other sorts and pagination require a key.
- **extension_trending** — Find growing extensions using saved 7/14/30/90-day user or rating-count growth rankings. Candidates have 1K-1M users and at least 500 net new users in the window. Free without a key for the first 10 by 30-day user gain; omit arguments for that preview. Missing comparison data is not zero growth; requests never rebuild rankings.
- **extension_rankings** — Read our saved user-count leaderboard for one date, overall or within a category. Returns positions and pagination; not official store or keyword search ranks. Use extension_rank_history to follow one extension over time.
- **extension_review_summary** — Get an existing published AI summary of collected reviews, with pros and cons. Use extension_reviews for original comments. Returns null when unavailable and English when a translation is missing; never calls a model or generates a new summary.
- **extension_review_insights** — Read stored review statistics and star distribution for an extension, optionally by review language. These describe collected reviews, not all store ratings. Missing statistics return null; no refresh is triggered.
- **extension_review_history** — Read collected review counts grouped by original publication date and stars, plus version-level ratings and undated/unrated counts. Reconstructed from retained reviews, not historical store rating-count snapshots.
- **extension_reviews** — Read original stored reviews for one extension, with text, star and language filters combined using AND. Returns reviews and pagination. For cross-extension or OR queries, use extension_reviews_search.
- **extension_reviews_search** — Search original stored reviews across extensions with AND/OR field filters. Returns reviews and pagination. Example filter: {"field":"body","operator":"contains","value":"subscription"}. Use extensionEid to narrow to an extension.
- **extension_source_search** — Find extensions by Manifest metadata, permission names, host patterns, descriptions or archived source file paths. Returns metadata matches and snippets, not full-text JavaScript search, source downloads or code-similarity analysis.
- **extension_api_usage** — Read the current API key's daily REST/MCP usage and remaining key/account allowance. Requires a key, but remains available after its daily data quota is exhausted. Does not debit data quota; account minute limits still apply.

## Claude Desktop Quick Installation
Remote MCP endpoint (confidence: medium). Install path inferred — verify against the README before running it. Add as a URL/SSE server in your client:

```json
"mcpServers": {
  "chrome-extension-downloader": {
    "url": "https://extensiondownloader.com/mcp"
  }
}
```

## Documentation

## 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.

_Full upstream README: https://allmcps.com/mcp/chrome-extension-downloader/readme_