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mcp/harbor
Grok

RetentionCheck for Grok

io.github.brianfofficial/retentioncheck-mcp-server

Pull churn from Stripe, Postgres, MySQL, or pasted feedback. AI-ranked drivers + fixes.

client:Grok transport:stdio runtime:npm

Install RetentionCheck in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "retentioncheck-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@retentioncheck/mcp-server"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "<ANTHROPIC_API_KEY>",
        "STRIPE_SECRET_KEY": "<STRIPE_SECRET_KEY>",
        "POSTGRES_URL": "<POSTGRES_URL>",
        "MYSQL_URL": "<MYSQL_URL>",
        "RETENTIONCHECK_TELEMETRY": "<RETENTIONCHECK_TELEMETRY>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

RetentionCheck in other clients

RetentionCheck MCP server