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Cactus MCP Server

Cactus MCP Server

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by hey-cactus
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Cactus MCP server

Cactus (heycactus.ai) learns a product from its codebase, answers its customers live, and keeps its help site and changelog current with every release. Its MCP server lets your team reach that knowledge from Claude, ChatGPT, Cursor, VS Code or any other MCP client.

This repository holds no server code. It lists Cactus's hosted MCP server: how to connect, the tools it offers, and the manifests MCP directories read.

Connect

  • Server: https://mcp.heycactus.ai/mcp

  • Transport: Streamable HTTP

  • Sign-in: OAuth 2.0 with your Cactus account (Google or GitHub). Dynamic client registration and client ID metadata documents are supported, with PKCE (S256).

Step-by-step setup for each AI client: https://heycactus.ai/docs/connect-an-ai-client

In Claude Code:

claude mcp add --transport http cactus https://mcp.heycactus.ai/mcp

In Cursor, add this to .cursor/mcp.json:

{
  "mcpServers": {
    "cactus": {
      "url": "https://mcp.heycactus.ai/mcp"
    }
  }
}

You need a Cactus team with a product built from a GitHub repository. Cactus is about to launch; its closed beta started on 16 Oct 2026. Join the waitlist at https://heycactus.ai.

Related MCP server: Citepath

Tools

On https://mcp.heycactus.ai/mcp, signed in:

Tool

What it does

list_products

List your team's products

search_help

Search the product's published help pages

read_page

Read a help page

list_topics

List help topics

read_timeline

Read the product's dated record of releases

lookup_map

Read the product map Cactus keeps from your code

search_conversations

Search past customer conversations

read_conversation

Read a conversation

search_evidence

Search past customer conversations and imported help articles

search, fetch

Search, and fetch a result

ask

Ask Cactus a question. It answers from the published pages, the product map, the product knowledge and past conversations, and cites its sources

start_investigation, get_investigation

Investigate a question in the product's code and knowledge, and read the finding

Every tool carries MCP annotations. No tool edits or deletes anything. Only ask and start_investigation aren't read-only, because each runs a new answer or investigation.

Public help-center servers

Every product's public help center has its own server, with no sign-in: https://mcp.heycactus.ai/p/<name>/mcp. Cactus's own help center is https://mcp.heycactus.ai/p/cactus/mcp. It offers search_help, read_page, list_topics, read_timeline, ask_help, contact_team, search and fetch.

ask_help answers the way the help center answers a visitor. It starts from the published help pages and reads the product map, the code index and the code when those fall short. contact_team sends the team a message they can reply to.

Links

The files in this repository are under the MIT license.

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityMaintained
ResponsivenessSyncing

Resources

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