apollo-config.module.ts

import { NgModule } from '@angular/core';
import { ApolloModule, Apollo } from 'apollo-angular';
import { HttpClientModule } from '@angular/common/http';
import { HttpLinkModule, HttpLink } from 'apollo-angular-link-http';
import { InMemoryCache } from 'apollo-cache-inmemory';

@NgModule({
    imports:[
        HttpClientModule,
        ApolloModule,
        HttpLinkModule
    ]
})

export class ApolloConfigModule {
    constructor(
        private apollo: Apollo,
        private httpLink: HttpLink
    ){
        const uri = 'https://api.graph.cool/simple/v1/cjmi9259f0t5a9c'; // Your endpoint goes here
        const http = httpLink.create({ uri });

        apollo.create({
            link: http,
            cache: new InMemoryCache(),
            connectToDevTools: true
        });
    }
}