diff --git a/README.md b/README.md
index a3c8eca8..7ca30122 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,19 @@ yarn prisma:seed
 yarn dev
 ```
 
+## Set Up Ngrok
+
+External data providers require HTTPS/SSL webhook URLs for sending data.
+
+To test this locally/during development, you will need to setup `ngrok`.
+
+1. Visit [ngrok.com](https://ngrok.com/)
+2. Create a free account
+3. Visit [this page](https://dashboard.ngrok.com/get-started/your-authtoken) to access your auth token
+4. Paste it into your `.env` file: `NGROK_AUTH_TOKEN={your_auth_token}`
+
+That's it! As long as you run the project locally using `docker` with `yarn dev:services:all` you'll be good to go.
+
 ## Contributing
 
 To contribute, please see our [contribution guide](https://github.com/maybe-finance/maybe/blob/main/CONTRIBUTING.md).