> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stackone.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fastbill Changelog

> Release history for the Fastbill connector. Each version lists what changed and which actions were affected.

<Card title="Fastbill connector" icon="arrow-left" href="/connectors/fastbill" horizontal>
  Back to the connector overview, authentication methods, and actions.
</Card>

<Update label="v2.1.0" description="18 Sept 2026">
  `data-sync`

  Added Data Sync support for articles, contacts, customers, documents, estimates, expenses, invoices, projects, recurring invoices, revenues, templates and time entries, so these collections can be kept in sync on a schedule. Most page through FastBill's LIMIT and OFFSET parameters, and invoices also sync incrementally, pulling only records changed since the last run. Added LIMIT and OFFSET inputs to List Documents, which now requests a full page by default so its documents page correctly.

  <AccordionGroup>
    <Accordion title="Changed · 12 actions updated">
      `fastbill_list_articles`, `fastbill_list_contacts`, `fastbill_list_customers`, `fastbill_list_documents`, `fastbill_list_estimates`, `fastbill_list_expenses`, `fastbill_list_invoices`, `fastbill_list_projects`, `fastbill_list_recurring_invoices`, `fastbill_list_revenues`, `fastbill_list_templates`, `fastbill_list_time_entries`
    </Accordion>
  </AccordionGroup>
</Update>

<Update label="v2.0.0" description="9 Sept 2026">
  `breaking` `bug-fix` `description-fix`

  List Revenues no longer accepts CURRENCY\_CODE, which Fastbill does not support for revenue entries; filter on the CURRENCY\_CODE field of the returned rows instead. Update Article now requires TITLE alongside ARTICLE\_ID, because Fastbill blanks an article title whenever an update omits it, so resend the current title on every update. Also fixes a 0% project VAT rate that would not save, and rejected document, invoice, revenue and recurring-schedule calls that previously looked successful.

  <AccordionGroup>
    <Accordion title="Changed · 20 actions updated">
      `fastbill_create_document`, `fastbill_create_estimate`, `fastbill_create_invoice`, `fastbill_create_recurring_invoice`, `fastbill_delete_estimate`, `fastbill_get_time_entry`, `fastbill_list_contacts`, `fastbill_list_customers`, `fastbill_list_estimates`, `fastbill_list_expenses`, `fastbill_list_invoices`, `fastbill_list_revenues`, `fastbill_send_invoice_email`, `fastbill_set_invoice_paid`, `fastbill_set_revenue_paid`, `fastbill_update_article`, `fastbill_update_contact`, `fastbill_update_customer`, `fastbill_update_invoice`, `fastbill_update_project`
    </Accordion>
  </AccordionGroup>
</Update>

<Update label="v1.1.0" description="3 Aug 2026">
  `new-actions`

  Added inbound webhook (events) support. StackOne now auto-provisions a Fastbill webhook on connect (covering the enabled events, via the webhook.create API service) and removes it on disconnect, routing customer, contact, invoice, and estimate events to your integration; includes a webhook events setup guide.
</Update>