Claude Code

Add this to .mcp.json in the project:

{
  "mcpServers": {
    "cosmic": {
      "url": "https://mcp.cosmicjs.com/v1/buckets/your-bucket-slug",
      "headers": {
        "Authorization": "Bearer your-read-key:your-write-key"
      }
    }
  }
}

Drop :your-write-key for read-only tools. The key rules are in MCP Server. Install the coding skill with:

npx skills add cosmicjs/skills

An agent that does not have a bucket yet should call the signup tools on https://mcp.cosmicjs.com/v1/agent instead of the bucket URL. The flow is AI onboarding.