All API calls to the UniBee service require an API key included in the request header. 
curl --location --request POST "$UniBee_API_Host/merchant/merchant_metric/merchant_metric_event" \
  --header "Authorization: Bearer $UNIBEE_API_KEY" \
  --header 'Content-Type: application/json' \
  --data-raw '{
    "metricCode": "folder_count_limit", // code needs to be configured in advance in the UniBee portal
    "externalUserId": "$YOUR_USER_ID",
    "externalEventId": "string", // string, __unique__, e.m. [folderId]
    "metricProperties": {}
  }'
You can go to UniBee Admin Portal (Configuration->Integrations->UniBee API Key) to create or regenerate the API key, the current key will still be valid within 1 hour after creating a new key. Go to our API docs for further detail.

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API object definitions

ResourceDefinition
Product APIA good or service that your business sells. A service product can include one or more features.
Plan APIDefines the unit price, currency, and billing cycle for a product.
User APIRepresents a customer who purchases a subscription. Use the Customer object associated with a subscription to make and track recurring charges and to manage the products that they subscribe to.
Invoice APIA statement of amounts a customer owes that tracks payment statuses from draft through paid or otherwise finalized. Subscriptions automatically generate invoices.
Payment APIA way to build dynamic payment flows. A PaymentIntent tracks the lifecycle of a customer checkout flow and triggers additional authentication steps when required by regulatory mandates, custom Radar fraud rules, or redirect-based payment methods. Invoices automatically create PaymentIntents.
Subscription APIRepresents a customer’s scheduled recurring purchase of a product. Use a subscription to collect payments and provide repeated delivery of or continuous access to a product.