Validate MCP Server: Install & Setup

Install Validate in Claude Code

Remote URL

Claude Code

claude mcp add --transport http validate https://api.machinegrade.dev/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "validate": {
      "url": "https://api.machinegrade.dev/mcp"
    }
  }
}

npm

Claude Code

claude mcp add validate -e SANDBOX_API_KEY=... -- npx -y @machinegrade/validate

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "validate": {
      "command": "npx",
      "args": [
        "-y",
        "@machinegrade/validate"
      ],
      "env": {
        "SANDBOX_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Validate MCP server do?

Deterministic validation of AI-generated artifacts: JSON Schema and OpenAPI response conformance and per-dialect SQL syntax, with typed verdicts and fix hints.

Is the Validate MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Validate run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Validate to Claude Code?

Run: claude mcp add --transport http validate https://api.machinegrade.dev/mcp

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