Set up a Base URL (with Glitch)
In the Developer Portal, extensions have a Base URL field. This indicates that the extension must provide the URL of a server that can receive and respond to HTTP requests from Canva. You can use any programming language, framework, or architecture to handle these requests.
This tutorial explains how to set up a Base URL with:
- Express.js - A minimal web framework for Node.js.
- Glitch - A free, web-based editor for developing (and automatically deploying) Node.js apps.
Step 1: Create a Glitch project
Navigate to glitch.com.
Log in or sign up to Glitch.
Click New Project.
This opens Glitch's code editor.
Step 2: Install Express.js
- Open the
- Click Add package.
- Search for
- Select the first result.
This installs Express.js.
Step 3: Set up the server
Replace the contents of the
server.js file with the following code:
const express = require("express");const app = express();app.use(express.json());app.use(express.static("public"));// Routes go hereapp.listen(process.env.PORT || 3000);
This code initializes an Express.js server without any endpoints. The required endpoints depend the extensions added to the endpoint and how the extensions are configured.
Step 3: Get the public URL of the server
For Canva to send requests to a Base URL, it needs to be exposed via a publicly available URL. This is something that Glitch provides without any further setup.
To get the public URL of a Glitch server:
- Click Share.
- Copy the URL from the Live site field.
This URL is the value that should be entered into an extension's Base URL field.
(Optional) Step 4: Open the logs
To verify that the server is running as expected—and to debug any errors that may occur—it's useful to view the logs.
Click Logs to view the logs of a Glitch server.
To learn more about Glitch, see the Glitch Help Center.