---
search:
  tags:
    - Documents
    - POST
seo:
  description: >-
    Draws a Helvetica-bold text stamp on selected pages (default: all).
    Positions:… Reference for the POST /documents/pdf/watermark endpoint in the
    Seal API.
sidebar:
  label: Stamp a text watermark onto a draft PDF
  badge: POST
title: Stamp a text watermark onto a draft PDF
type: openapi-operation
---
Draws a Helvetica-bold text stamp on selected pages (default: all). Positions: diagonal (default), center, or footer. Deterministic pdf-lib — no Seal-hosted model inference.

`POST /documents/pdf/watermark`