Navigate to Integrations > API Credentials and select "Add Private API Key" from the top right corner:

Give the key a name, and let Recurly know that it's being used for the Upzelo connection. Then hit 'Save Changes'.

Once your key has been created, you'll need to click on the eye icon to reveal it and then copy and paste into Upzelo:
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Upzelo requires a webhook to be setup in Recurly so that subscription changes are kept synchronised in real-time and customer flow outcomes are processed for subscriptions immediately.

Live mode
Fill in your account's app id and copy and Paste the Upzelo webhook configuration into Recurly > Integrations > Webhooks > Configure > New Endpoint.

Endpoint Name: Upzelo
​Endpoint URL: https://upzelo.com/webhooks/recurly/0/[Upzelo app id]
Format: XML

Test mode

Fill in your account's app id and copy and Paste the Upzelo webhook configuration into Recurly > Integrations > Webhooks > Configure > New Endpoint.

Endpoint Name: Upzelo
​Endpoint URL: https://upzelo.com/webhooks/recurly/1/[Upzelo app id]
Format: XML
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When you reach the New Endpoint screen, ensure you have selected format "XML" and selected "Select all notifications".