Query Data from MongoDB

In this example, we’re going to build an Endpoint that allows us to read data from a Database. We’ll be using MongoDB in this example, but you can easily swap this out with PostgreSQL or MySQL!
Before we get started with building the Endpoint, let’s create the needed Environment Variables. Head over to the “Environment Variables” section in the Sidebar, located on the right-hand side of the app and create the following variable:
  1. 1.
    MONGODB_URI - Your MongoDB connection string
To enable Buildable to connect to your database, please ensure that your firewall accepts incoming requests from the following IP address:
If you’ve got a separate database for Development and Production, ensure to specify the appropriate values when creating the Environment Variable.

Building the Endpoint

  1. 1.
    Create an Endpoint named query-mongodb-data and set the method type to POST
2. Paste the following code into the Code section
async function response({ body, headers, env }) {
const { collection, query, limit, skip } = body;
const data = await find(env.MONGODB_URI, collection, query, limit, skip);
return {
status: 200, // HTTP Response Status Code
headers: {}, // Response Headers
// Response Body
body: data
async function find(uri, collection, query, limit, skip) {
const db = new MongoDBHelper(uri)
return await db.find(collection, query, limit, skip)
class MongoDBHelper {
constructor(uri) {
this.uri = uri
async connect() {
const MongoClient = require("mongodb").MongoClient
const client = new MongoClient(this.uri)
await client.connect()
this.db = client.db()
this.client = client
async disconnect(client) {
await this.client.close()
async find(collectionName, query, limit = 1, skip = 0) {
await this.connect()
const collection = this.db.collection(collectionName)
const result = await collection
await this.disconnect()
return result
You can also select the Query data from MongoDB example from the Snippets section, located next to the Code editor.
Given a body payload that contains a collection, query, limit, and skip value, this Endpoint will query your Mongo Database and return the data! Give your Endpoint a try with this sample body payload:
"collection": "YOUR_COLLECTION_NAME",
"query": {},
"limit": 10,
"skip": 0
Using the Knex NPM package, you can query and interface with various databases such as PostgreSQL, MySQL, CockroachDB, MSSQL, SQLite3, Oracle, etc.