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Website source search for AI agents (API and MCP)

Connect StackGrep's MCP server and your agent can search website code, count how many sites use something, and build lists by tech stack. Plain words work; agents switch to regex only when they need a pattern.

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Who it's for

Developers building research and lead-gen agents
People using Claude or Cursor who want answers about the web's tech
Data teams who'd rather call an API than run a crawler

Searches to start with

Click one to run it. No account needed.

Which sites embed a given widgetwidget.example.comcode Sites with a specific tag ID formatGTM-[A-Z0-9]{6,8}regex Stores using Klaviyo and Yotpoklaviyo AND yotpostack

Questions

Which tools does the MCP server give my agent?

search_source (find sites whose HTML contains something), count_sites (how many), and filter_sites (by tech stack).

Does my agent need to write regex?

No. Plain words are matched literally and ignore case. Regex is there when the agent needs a pattern.

How is it billed?

From the same credits as the website: 1 a search, 5 for counts and stack filters. You can cap any API key.

Want the whole list?

Sign up free to download every site you find, and get a heads-up when new ones appear. 500 free credits a month, no card needed.

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