> ## 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="v2.0.0" 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>