You can print Sendle labels via ReadyToShip and automatically receive Sendle Premium pricing for free.
Step 1: Create a Sendle account
If you don't have a Sendle account, you can create one here.
Step 2: Go to your Account Settings in Sendle
Step 3: Generate an API Key
Important: To enable the API tab in your Sendle Account settings, you need to Complete the Dangerous Goods declaration. You can find this on the Pickup tab under Account Settings.
Add a credit card to your account in the Billing page.
Go to the API tab in the My Account page and generate a new API key
Enter your store's domain name and estimated parcels per month Click Claim Access to generate your API key. The API Key and the Sendle ID will need to be entered into the setup process in ReadyToShip in the next step.
Step 4: Add Sendle as a Carrier in ReadyToShip
In ReadyToShip, go to Settings ⇒ Carriers ⇒ Add Carrier, and click Sendle
You will be shown the Sendle connection page (Step 1) in the process.
This is where you need to enter your API Key and Sendle ID from Step 3.
And that's it. Once you have entered payment details in your Sendle account, ReadyToShip will now be able to quote on your shipments and print labels for Sendle.