Using Sendle
From Spiffy Stores Knowledge Base
Spiffy Stores provides an easy to use integration with Sendle. There are a number of steps that you need to go through in order to connect your store to your Sendle account.
You can read more about how to generate an API key for your Sendle account here https://developers.sendle.com/reference/getting-your-api-key.
1. Signup with Sendle
Add Payment Details
You can sign up for a new account at https://www.sendle.com/users/sign_up
Before you can start using the API, you'll need to attach a credit card to your account for invoicing. This card will need to be in the currency you're going to be creating orders in.
2. Generate an API Key
Access your Business Details
Login to your MyPost Business account, and find the Business details link in the drop-down menu at the top right-hand corner of the page under your account name.