Is Heroku safe to install?

A server's blast radius is the most powerful thing each of its tools can do. This grades the tools it declares, read-only, not whether it is secure.

• mediumTool declares a high-privilege capability×4
• mediumTool input schema asks for a credential

Keyword matches in tool descriptions and schemas. These are shown for transparency and are not part of the grade.

• highCode-execution capability×3
• highCredential / secret access capability×2
• highSQL DELETE/UPDATE without WHERE
• highShell/command injection

Drop this into your MCP client config (Claude Desktop, Cursor, and others).

{
  "mcpServers": {
    "heroku": {
      "command": "npx",
      "args": [
        "-y",
        "@heroku/mcp-server"
      ]
    }
  }
}

The grade reflects the blast radius of what Heroku declares it can do, read-only, not whether it is secure or trustworthy, and not a judgment of the vendor. Maintain this server? Claim this listing or request a re-scan. See the methodology.