import SGPClient from 'sgp';

const client = new SGPClient({
  apiKey: process.env['SGP_API_KEY'], // This is the default and can be omitted
});

const response = await client.applications.validate({
  edges: [{ from_field: 'from_field', from_node: 'from_node', to_field: 'to_field', to_node: 'to_node' }],
  nodes: [{ id: 'id', application_node_schema_id: 'text_input_schema' }],
  version: 'V0',
});

console.log(response);

{
  "errors": [
    {
      "error_code": "INVALID_APPLICATION_NO_INPUT_NODE",
      "message": "<string>"
    }
  ],
  "sgp_error_code": "APPLICATION_BUILDER_VALIDATION_ERROR"
}