> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://support.pdfgeneratorapi.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Release Notes 2.259.0 (08.07.2026)

This release introduces updates to the embedded Editor, flexible prefill URL options via the API, and several stability fixes across billing and logging workflows.

### New Features and Improvements
* **Prefilled Viewer URLs via POST** Added support for retrieving a Document Viewer URL containing prefill data and reviewer personal data using a POST request.
* **GitHub SDK Updates** Updated official SDKs and API wrappers across GitHub repositories to align with recent v4 API extensions.
* **Form-First Review Enforcement** Enhanced the Document Viewer workflow to require users to fill out the data collection form completely before the signing step becomes available.
* **Schema Compatibility** Fixed Model Context Protocol (MCP) tool schemas by removing empty-string enum values that caused validation failures for specific API clients.
* **Core Documentation** Added comprehensive details regarding prefill fields to the Store Document API documentation.

### Bug Fixes
* **Webhook Versioning Fix** Fixed an issue where the document webhook response URL returned the initial, unsigned document version instead of the newly updated version after a signing event.
* **Subscription Plan Management** Resolved policy errors that blocked users from switching from annual to monthly plans, or modifying subscription tiers if an underlying account status change was pending.
* **Usage Logging Type Error** Fixed a system exception in the background logging system where a null value passed to the usage event tracker caused a type error.