Connect cubic to your IDE

Connect cubic’s MCP server to your coding agent to read review findings and codebase context, request PR reviews, and triage PR or codebase scan issues.

Use the exact endpoint https://www.cubic.dev/api/mcp. Some OAuth clients reject https://cubic.dev/api/mcp because the protected resource origin does not match.

Add the server

Add cubic to ~/.cursor/mcp.json for all projects, or .cursor/mcp.json for one project. If the file already has servers, add the cubic entry inside its mcpServers object:

{
  "mcpServers": {
    "cubic": {
      "url": "https://www.cubic.dev/api/mcp"
    }
  }
}

Connect

Open Cursor’s MCP settings, connect cubic, and complete the browser sign-in flow.

Add the MCP server

Add this to ~/.cursor/mcp.json or project .cursor/mcp.json:

{
  "mcpServers": {
    "cubic": {
      "type": "http",
      "url": "https://www.cubic.dev/api/mcp"
    }
  }
}

Run these commands from the project where you use Cursor Agent:

agent mcp enable cubic
agent mcp login cubic

Verify

agent mcp list-tools cubic

Add the MCP server

claude mcp add --transport http --scope user cubic https://www.cubic.dev/api/mcp

Open Claude Code and run:

/mcp

Choose cubic and complete the browser OAuth flow.

Verify

claude mcp list

Optional skills and slash commands

Install the cubic plugin to add skills and namespaced slash commands:

/plugin marketplace add mrge-io/skills
/plugin install cubic@cubic

Add the MCP server

codex mcp add cubic --url https://www.cubic.dev/api/mcp

codex mcp login cubic

Verify

codex mcp list

Add the MCP server

gemini mcp add --transport http --scope user cubic https://www.cubic.dev/api/mcp

Open Gemini CLI and run:

/mcp auth cubic

Verify

/mcp

Add the MCP server

Add this to ~/.config/opencode/opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "cubic": {
      "type": "remote",
      "url": "https://www.cubic.dev/api/mcp",
      "enabled": true
    }
  }
}

opencode mcp auth cubic

Verify

opencode mcp list

Add the MCP server

droid mcp add cubic https://www.cubic.dev/api/mcp --type http

Open Droid, run /mcp, choose cubic, and complete the browser OAuth flow.

Verify

The /mcp panel should show cubic as connected.

Install cubic's Pi target

npx @cubic-plugin/cubic-plugin install --to pi

The installer writes Pi’s MCP config to ~/.config/mcp/mcp.json.

Install the MCP adapter (if needed)

pi install npm:pi-mcp-adapter

Skip this step if pi-mcp-adapter is already installed.

Check the MCP config

The adapter reads ~/.config/mcp/mcp.json automatically. Confirm the config contains:

{
  "mcpServers": {
    "cubic": {
      "auth": "oauth",
      "url": "https://www.cubic.dev/api/mcp"
    }
  }
}

/mcp-auth cubic

Verify

/mcp reconnect cubic

Add the MCP server

Open the Command Palette, run MCP: Add Server, choose HTTP, and enter:

https://www.cubic.dev/api/mcp

Name the server cubic and choose Global or Workspace for the configuration.

Run MCP: List Servers, start cubic, and complete OAuth when prompted.

Verify

Run MCP: List Servers and confirm cubic is running.

What you can ask

Try “use cubic to show open review issues on this PR”. The agent should retrieve the findings with file locations and descriptions. See MCP tools and examples for a prompt using an explicit PR URL.

“start a cubic review of this PR”
“list wiki pages for this repo”
“what review learnings apply here?”
“show scan findings with severity at least 7”

Skills and slash commands

MCP gives your agent access to cubic tools. For agents that also support skills or slash commands, install those separately:

npx @cubic-plugin/cubic-plugin install --skills-only

The installer detects supported agents in your home directory. Add --to codex, for example, to choose one target. See Skills for prerequisites, verification, and command names for each installation.

To ask your agent to “review my code” locally, install and sign in to the cubic CLI. MCP setup alone does not install the CLI.

Get started

AI code review

Review in cubic

cubic in your IDE

Measure impact

Portal

Account & support

API reference

What you can ask

Skills and slash commands

​What you can ask

​Skills and slash commands

What you can ask

Skills and slash commands