Get notified on Slack when a buyer purchases your NFT with Paper:
- As a Slack admin, click the Add to Slack button on the Incoming WebHooks page in your Slack directory
- Select the channel you'd like to post your message to.
- Click Add Incoming Webhooks.
- Copy the Webhook URL (which starts with https://hooks.slack.com/services/...).
- Edit your checkout and add copy this URL as one of the webhook URLs.