You can now add and update external references on invoices and credit memos:

• PUT /invoices/{id} - Update invoice including external_references
• PUT /credit-memos/{id} - Update credit memo including external_references

This allows you to link these documents to records in your external systems after creation.

• Journal entries now include the fields property in API responses, showing any custom field values associated with the entry.

Single contract responses (GET /contracts/{id}) now include:

• invoices - List of invoices associated with the contract
• Invoice status field showing the current invoice state

New filter and sort options for journal entries:

• updated.gt - Filter journal entries updated after a specific timestamp
• sort - Sort by updated_at in ascending or descending order

• Added updated.gt filter parameter to GET /customers to retrieve customers updated after a specific timestamp

Filter entities by their last update time using the updated.gt parameter:

• GET /invoices?updated.gt={timestamp} - Invoices updated after timestamp
• GET /credit-memos?updated.gt={timestamp} - Credit memos updated after timestamp

Note: The previous updated_after parameter has been renamed to updated.gt for consistency with other filter parameters.

Subscribe to real-time event notifications for key entities:

Available Events:

• customer-created, customer-updated, customer-deleted
• contract-created, contract-updated, contract-deleted
• invoice-created, invoice-updated, invoice-deleted, invoice-payment-updated
• credit-memo-created, credit-memo-updated, credit-memo-deleted, credit-memo-payment-updated

Webhook payloads include the full entity data and are signed for verification.

Manage sales tax on invoices and credit memos:

• POST /invoices/{id}/taxes - Add sales tax to an invoice
• PUT /invoices/{id}/taxes - Update sales tax on an invoice
• POST /invoices/{id}/calculate-tax - Calculate tax for an invoice
• POST /credit-memos/{id}/taxes - Add sales tax to a credit memo
• PUT /credit-memos/{id}/taxes - Update sales tax on a credit memo

• PUT /invoices/{id}/sent - Update the sent status of an invoice to track whether it has been delivered to the customer

• Added sort parameter to GET /customers to sort by updated_at in ascending or descending order