Connect Cromus to your AI client

The consent screen shows an error

Cromus does not appear in my client's tool list

Authorization window never opens

Which plans support connectors?

I see fewer tools than expected in my client

Available on Claude Pro, Max, and Team plans.

1. 1Run the command below in your terminal.
2. 2A browser window opens asking you to approve access.
3. 3Approve access on the Cromus consent screen.
4. 4Return to the terminal. The connector is active.

claude mcp add --transport http cromus https://mcp.cromus.ai/mcp

Install the Cromus Agent Plugin to get all 17 Cromus tools in any compatible coding agent — Claude Code, Cursor, Cline, Codex — whether or not you route through Vercel AI Gateway.

1. 1Run the command below in your terminal inside your project.
2. 2A browser window opens asking you to approve access.
3. 3Approve access on the Cromus consent screen.
4. 4All 17 Cromus tools are now available in your agent session.

npx plugins add @cromus-ai/plugin

Requires an agent client that supports Agent Plugins 1.0. The plugin is published as @cromus-ai/plugin on npm — no server to host or keys to manage.

Install the Cromus dsh-plugin to get all 17 Cromus tools in your DeepSeek Harness agent session.

1. 1Run the install command below in your terminal.
2. 2Set your Cromus API key as an environment variable (get one at cromus.ai/connect).
3. 3Start or restart your dsh agent session.
4. 4All 17 Cromus tools are now available under the mcp__cromus__ namespace.

dsh plugins add @cromus-ai/dsh-plugin

export CROMUS_API_KEY=your_key_here

Tools appear under the mcp__cromus__* namespace. The plugin is published as @cromus-ai/dsh-plugin on npm — no server to host or keys to manage beyond the API key above.

The Cromus VS Code extension scores and validates your governance files directly in the editor — no context switching required. Inline diagnostics, status-bar CROMS score, model pricing on hover, and policy-as-code enforcement all run on save.

1. 1Search for Cromus in the VS Code Marketplace and click Install, or run the command below.
2. 2Open VS Code Settings (Cmd/Ctrl+,) and search for Cromus.
3. 3Set Cromus: Api Key to your Cromus API key (get one under API Keys above).
4. 4Open any SKILL.md — your CROMS score appears in the status bar and inline diagnostics run on save.

code --install-extension CromusAI.cromus

View on the VS Code Marketplace. The same API key works in the MCP server, the GitHub Action, and the extension.

The Cromus GitHub Copilot Extension puts scoring, validation, and cost simulation directly inside Copilot Chat — on GitHub.com, in VS Code Copilot Chat, and anywhere Copilot Chat extensions are supported. No API key or MCP server needed.

1. 1Click the button below to install the Cromus GitHub App on your account or organization.
2. 2Open any GitHub repository and click the Copilot Chat icon.
3. 3Type @cromus followed by your request — no API key or MCP server required.
4. 4Cromus responds inline: scores, validation results, cost tables, and policy checks.

All analysis is deterministic — zero additional LLM calls. Paste your SKILL.md content directly into the chat; fenced code blocks and bare YAML both work.

Any client that supports remote MCP servers with OAuth can connect using the server URL below. Add the following block to your client's MCP server configuration. The client handles the OAuth authorization flow automatically.

{
  "mcpServers": {
    "cromus": {
      "type": "http",
      "url": "https://mcp.cromus.ai/mcp"
    }
  }
}

After saving the configuration, start a new session. The client will open a browser window for authorization on the first connection.