Docs
Connect an AI client to Cactus
Cactus answers questions about your product from your own sources and cites each answer. Over MCP, the way AI clients connect to tools, you ask it from inside Claude, ChatGPT, Cursor, VS Code, Codex or Claude Code.
For your team
One address reaches every product on your team. The first time a client uses it, you sign in with your Cactus account and see what it sees.
https:/It adds the server for every project on this machine.
claude mcp add --transport http --scope user cactus https:/What a public help site serves
Each address below is live on our own help site.
Find
A robots.txt that lets every AI crawler in and says how the pages may be used, in Content Signals.cactus.heycactus.ai/robots.txt
A sitemap with every published page and when it last changed.cactus.heycactus.ai/sitemap.xml
An llms.txt that lists every page with a line on what it answers.cactus.heycactus.ai/llms.txt
Read
A markdown copy of every page, at the page's address with /md on the end.cactus.heycactus.ai/publish-machine-readable-help/md
The page's own address answers in markdown to a request that sends Accept: text/markdown.cactus.heycactus.ai/publish-machine-readable-help
Every page in one file, for a model that wants the whole site at once.cactus.heycactus.ai/llms-full.txt
Act
A public MCP address anyone can add to Claude, ChatGPT, Cursor or Codex, no account needed, described by its server card. Every address the site answers for a program, the ask included, is described in OpenAPI at cactus.heycactus.ai/openapi.json.cactus.heycactus.ai/.well-known/mcp/server-card.json
An Agent Skill that tells an agent how to ask the help, over MCP or as text.cactus.heycactus.ai/.well-known/agent-skills/ask-help/SKILL.md
Four tools in the messenger for browser agents, through WebMCP where the browser offers it. The owner can switch them off.
For your customers
Each published Help Center has its own address, one per product. Anyone can add it to the same six clients with no sign-in and no account, and it answers from published pages only.
https://mcp.heycactus.ai/p/<product name>/mcpThe name is your Help Center's, the part before .heycactus.ai. The owner finds the exact address in Cactus under AI clients in the top navigation, with a button for each client.
What each tool can see
Same address either way. What it shows depends on who asks.
Signed in with a Cactus account
Your pages, including the ones only your team can read
The map of your code
Past conversations with your customers
Investigations Cactus has run for you
Not signed in
Published pages from that one product
Nothing that is not published
Answers can be wrong
Every answer links to the page or file it came from, so you can open what Cactus read. It is still a model reading text and can be wrong or out of date, so check anything that matters before you act on it.
Support
Email hello@heycactus.ai. We reply within two business days, and you do not need an account.
What we collect and how long we keep it is on the privacy page.