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

# API changelog

> Changes to the Flowsign REST API and webhooks.

<Update label="v1.0.0" description="28 September 2026">
  ## Public API v1

  * **Public API v1.** Bearer API keys (`fsk_` prefix) created from **Settings > API keys**. Endpoints for workspaces, packages (list, create, get, act on, delete) and templates (list, create, get, update, delete, instantiate). Requests act in one workspace per call via the `X-Workspace-Id` header. See the [developer quickstart](/developers).
  * **Webhooks.** Register HTTPS endpoints from **Settings > Webhooks** or `POST /api/v1/webhooks`. Nine package and session events, HMAC-SHA256 signatures, automatic retries with exponential backoff, and a per-endpoint delivery log. See [Webhooks](/webhooks/overview).
</Update>