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The MCP server exposes the full GroupDocs.Watermark engine: every format the .NET library can watermark — 50+ document, spreadsheet, presentation, image, and diagram formats — is available to your AI agent. The canonical matrix lives in the library documentation: supported document formats.
What agents are asked for most:
- PDF — the distribution format, and the one where CONFIDENTIAL and DRAFT marks earn their keep.
- DOCX / XLSX / PPTX — mark a document while it is still being worked on, in its own format.
- Images (PNG, JPG, TIFF) — both as targets and as the source of an image watermark.
Watermark sources: an image watermark can be a PNG, JPG, or similar file resolved from your storage folder by name, exactly like the document.
What can be removed depends on how the mark was applied. Watermarks added as watermark objects — by this server, by the GroupDocs library, or by many common tools — can be found and removed. A mark flattened into a page image, or drawn as ordinary content, cannot: search_watermarks tells you which you are dealing with.
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