validateGraphql.ts

import { graphql } from 'react-relay';
import { getNode } from 'relay-runtime';

const ShoesListQuery = graphql`
  query ShoesListQuery {
    shoes {
      size
      type
    }
  }
`;

const shoesStatusNode = getNode(ShoesListQuery);
const url = '<my-graphql-server-url>';
await fetch(url, {
      method: 'POST',
      headers: {
        Accept: 'application/json',
        'Content-type': 'application/json',
      },
      body: JSON.stringify({
        query: shoesStatusNode.params.text,
        operationName: shoesStatusNode.operation.name,
        variables: {},
      }),
    });