# StackScan

> StackScan is technographic intelligence on 425M+ websites: look up the
> technology stack behind any domain, find every website running a given
> technology, and pull company (firmographic) data for the business behind a
> site. Data comes from StackScan's own crawl and is refreshed in batches.

Pricing is credit-based: one Bulk Lookup Credit per resolved lookup. Lookups
that return no data are free. Plans and credit bundles: https://www.stackscan.com/pricing

## For agents and developers

- [API reference](https://api.stackscan.com/docs): every endpoint, with code
  samples in ~20 languages and a live test console
- [OpenAPI 3.1 document](https://api.stackscan.com/docs/openapi.json): machine-readable spec
- [API llms.txt](https://api.stackscan.com/llms.txt): plain-text endpoint
  summary for agents; a full field-level reference is at
  https://api.stackscan.com/llms-full.txt
- [MCP server](https://www.stackscan.com/mcp): npm `@stackscan/mcp-server`,
  registry `com.stackscan/mcp-server`. Six tools wrapping the API for Claude,
  Cursor and other MCP clients
- Authentication: Sanctum bearer token plus an `X-Tenant-Id` workspace header,
  both from the dashboard under My Accounts -> API Tokens

## Product pages

- [Tech Lookup](https://www.stackscan.com/tech-lookup): the stack behind one domain
- [Keyword Scan](https://www.stackscan.com/keyword-search): find sites by topic or niche
- [Custom Scan](https://www.stackscan.com/custom-scan): find sites by the files they serve.
  Search by file name, asset path or asset host across 425M+ websites. Built for
  security research: enumerate a specific vulnerable library build, or every site
  still loading assets from a compromised third-party host
- [Browse Technologies](https://www.stackscan.com/browse): explore stacks by category
- [Help Center](https://www.stackscan.com/docs): tools, API, MCP, credits and billing
- [Pricing](https://www.stackscan.com/pricing) and [FAQs](https://www.stackscan.com/faqs)
- [Contact](https://www.stackscan.com/contact)