Payload Validator for Cursor

com.gumballtools/payload-validator

Validate JSON, YAML, XML and CSV with exact line/column errors and silent-corruption warnings.

client:Cursor transport:streamable-http tools:5

Install Payload Validator in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

{
  "mcpServers": {
    "payload-validator": {
      "url": "https://payload-validator.gumballtools.com/api/mcp"
    }
  }
}

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs