Documentation

Connect RankGenius to your AI assistant over MCP, or call the REST API from your own code. Both expose the same tools across 21 Amazon marketplaces, authenticated with a single API key.

Your API key — one key authenticates both the MCP server and the REST API. Present it as Authorization: Bearer <your-api-key>.

<your-api-key>

Find your real key on your Dashboard after you sign up free — keep it secret. Rotate it any time with Regenerate Key.

MCP (for AI clients)

Connect Claude, Cursor, or any MCP-compatible client and ask questions in natural language — the assistant calls the tools for you.

MCP Integration →

REST API (for developers)

Call the tools directly over HTTPS and get a JSON envelope back. Ideal for scripts, dashboards, and back-end integrations.

REST API Reference →

The tools

Tool	What it returns
`keyword_rank` Keyword Rank	Live Amazon search results (organic + sponsored) for a keyword.
`buybox` Buy Box	Who owns the Buy Box for an ASIN, plus price, stock, and delivery.
`mobile_search` Mobile Search	Like Keyword Rank, but the mobile (phone) search page, which often differs.
`product_page` Product Page	Structured product details parsed from the listing (and, on request, the full page HTML).
`product_reviews` Product Reviews	Customer reviews for an ASIN, one page at a time.
`seller_details` Seller Details	A seller's public storefront details by seller id.
`supported_zips` Supported Zips	The delivery zip / postal codes accepted by the optional zip parameter.

Every tool call counts as one metered request. You can try any tool in your browser first on the Explore page.