AppSigma MCP Server

App Store intelligence for LLMs — apps, reviews, rankings, developers, in-app purchases, price history, editorial features and in-app events, straight from the AppSigma API.

This is a hosted (remote) MCP server — nothing to install or run. It speaks Streamable HTTP at:

https://api.appsigma.io/mcp

Authentication is the same X-API-Key header the REST API uses. Try it instantly with the built-in demo key demo (no signup), or get a real API key for full access.

Setup

Cline

Add to your Cline MCP settings (cline_mcp_settings.json):

{
  "mcpServers": {
    "appsigma": {
      "type": "streamableHttp",
      "url": "https://api.appsigma.io/mcp",
      "headers": {
        "X-API-Key": "demo"
      }
    }
  }
}

Replace demo with your API key when you have one.

Claude Code

claude mcp add --transport http appsigma https://api.appsigma.io/mcp --header "X-API-Key: demo"

Claude Desktop / Cursor / other MCP clients

Any client that supports remote Streamable HTTP servers works with the same URL and header:

{
  "mcpServers": {
    "appsigma": {
      "type": "http",
      "url": "https://api.appsigma.io/mcp",
      "headers": { "X-API-Key": "demo" }
    }
  }
}

Tools

One tool per REST endpoint — every call is authenticated, rate-limited and billed credits exactly like the REST route it wraps. Credit costs are stated in each tool description.

Search & catalog

Tool	Description
search_applications	Search the App Store by term (proxies iTunes Search).
list_applications	List/filter the application catalog (by ids, term, filters; paginated).

Applications

Tool	Description
get_application	One application by id, full detail.
get_application_reviews	Customer reviews (paginated, filterable by country).
get_application_versions	Version/release history.
get_application_similars	Similar apps.
get_application_in_app_purchases	In-app purchases.
get_application_price_changes	Price change history.
get_application_editorial_items	App Store editorial stories featuring the app.
get_application_events	In-app events of the app.
get_application_chart_history	Chart position history.
get_application_rating_histogram	Star-rating histogram over time.
get_application_ratings_by_version	Ratings broken down by version.
get_application_review_histogram	Review-count histogram.

Charts

Tool	Description
get_chart_positions	Current App Store chart positions by chart/genre/country.
get_chart_history	Historical chart data across apps.

Developers

Tool	Description
get_developer	One developer (publisher) by id.
get_developer_applications	A developer's applications.
get_developer_events	In-app events across a developer's apps.

Editorial & events

Tool	Description
get_editorial_item	One App Store editorial story by id.
get_event	One App Store in-app event by id.

Demo mode

The demo key is free and needs no signup. It is limited to a curated set of applications and developers, a fixed set of search terms, shallow chart depth, and a per-IP rate limit — enough to explore every tool. A paid key removes all of those limits.

Links

• API documentation: https://docs.appsigma.io
• Get an API key: https://appsigma.io