Get Schema SDL from Remote GraphQL API

gistfile1.txt

import graphql from 'graphql';

const resp = await fetch(url, { method: 'POST', body: JSON.stringify({ query: graphql.getIntrospectionQuery() }), headers: { 'content-type': 'application/json' } });
const introspectionResult = await resp.json();
const schema = graphql.buildClientSchema(introspectionResult.data);
const sdl = graphql.printSchema(schema);