To use Merchize with Customily for Etsy, the first thing you need to do is to create an account on Merchize. If you don't have an account with Merchize, you can create one here.

Once you have a Merchize account, you will need to add them as a Production Partner on your Etsy shop. Etsy requires stores to disclaim who is fulfilling the products for them. So for Customily to be able to send the orders from Etsy to Merchize we need this information to be added to your Etsy account.

Follow these steps to add Merchize as a production partner on your Etsy.

1. Sign in to your Etsy account.
2. Go to your Shop Manager, and choose Settings.
3. Select Production partners.
4. Select Add a new production Partner and fill out the following information:
   • - Production partner:  Merchize
   • - Location: Select the location that aligns with the facility fulfilling your orders (e.g., US, EU, UK, Vietnam)
   • - About your partnership: You can simply put "A production partner", or fill in a short description of why you like to work with them if you're feeling inspired.
   • - Production partner:  select the following statements
     "I don't have the technical ability to make it entirely by myself"
     "I design everything myself"
     "They do everything for me"
5. Once done, you can click Show Preview to see how it will appear in your store.
6. Click Save Partner and you are done!

Once you have Merchize added as your Production Partner, open your Customily app on Shopify and follow these steps.

1. Head on to Start or Store on the left menu
2. Go to Settings and open the Integrations tab.
3. If you have more than one store on your account, make sure you are changing the setting of the correct store by selecting it from the top left dropdown.
   
4. Select Merchize from the Select a provider for integration dropdown
5. Click enable integration
   
6. Paste your Merchize API Key (also known as Access Token) and API Signature (also known as Base URL). Learn where you can find your Access Token and Base URL on Merchize here. 
   
7. Click Save Settings at the bottom of the page.
8. To make sure order tracking is properly synched, you will need to add Customily's webhook to your Merchize account settings. To do that, open your Merchize account, go to "Integrations" on the left menu and click API. Scroll down to the webhook section, click Add webhook.
   
9. Paste the following URL on the Webhook Endpoint

https://sh.customily.com/provider/hooks/orderShipped?provider=merchize

And select the event: Order changed tracking

Click Add to save the webhook.