# \#docbuilder-api

**URL:** https://community.onlyoffice.com/tag/docbuilder-api/159.md

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## [How to use v9.3 signature field via DocBuilder API?](https://community.onlyoffice.com/t/how-to-use-v9-3-signature-field-via-docbuilder-api/20621)

<div class="topic-metadata">

**Author:** [@therootcompany](https://community.onlyoffice.com/u/therootcompany)\
**Replies:** 1\
**Last updated:** [3 September 2026 11:16 UTC](https://community.onlyoffice.com/t/how-to-use-v9-3-signature-field-via-docbuilder-api/20621 "2026-09-03T11:16:43Z")

</div>

I’m on Document Server 9.4 and I’m trying to use DocBuilder to add the Signature field introduced in 9.3 (for documents that have a variable number of signers). This is how I’m doing it in the docx: let customerSig …