What this skill does
Add a text watermark to one or multiple PDFs by uploading them to the Solutions API, polling until completion, then returning download URL(s) for the watermarked PDF(s) (or a ZIP if multiple).
Add watermark to PDF is part of the Data & APIs category — data and API skills that fetch, query, and work with external data sources. You can install it on its own or alongside other data & apis skills from the OpenClaw catalog.
How to install Add watermark to PDF
The easiest path is via the OpenClaw Easy desktop app — one click, no terminal required:
- Download OpenClaw Easy for macOS or Windows (free, one-click installer, ~30 seconds).
- Open the in-app Skills panel.
- Search for
add-watermark-to-pdfand click Install. - The skill activates automatically when an incoming message matches its description.
Install from the command line
If you already run the OpenClaw CLI, add Add watermark to PDF with a single command:
openclaw skills add add-watermark-to-pdf
This pulls add-watermark-to-pdf from ClawHub and installs it into ~/.openclaw/skills/add-watermark-to-pdf/. Restart the OpenClaw gateway afterwards so the new skill is discovered.
How to use Add watermark to PDF
Once installed, Add watermark to PDF activates on its own: when an incoming message on WhatsApp, Telegram, Slack, Discord, Feishu or Line matches the skill's description, your OpenClaw agent loads it and runs the workflow. You can also trigger it explicitly by describing the task in chat. No extra configuration is required after install.
Manual install (advanced)
If you prefer manual installation:
- Click the Download .zip button above to grab
add-watermark-to-pdf-1.0.0.zipdirectly from our S3 mirror. - Unzip into
~/.openclaw/skills/add-watermark-to-pdf/(create the directory if it does not exist). - Restart OpenClaw Easy (or the OpenClaw CLI gateway) so the new skill is discovered.
Frequently asked questions
How do I install Add watermark to PDF?
Install Add watermark to PDF in the OpenClaw Easy desktop app by opening the Skills panel, searching for add-watermark-to-pdf, and clicking Install. From a terminal you can run: openclaw skills add add-watermark-to-pdf. Either way the skill is placed in ~/.openclaw/skills/add-watermark-to-pdf/.
Is Add watermark to PDF free?
Yes. Add watermark to PDF is free and open-source, distributed under the Apache-2.0 license through ClawHub. No account or payment is required to download or run it.
What does Add watermark to PDF do?
Add a text watermark to one or multiple PDFs by uploading them to the Solutions API, polling until completion, then returning download URL(s) for the watermarked PDF(s) (or a ZIP if multiple).
Related: more data & apis skills
If Add watermark to PDF looks useful, you may also want to check out other data & apis skills in the OpenClaw catalog:
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Free, open-source · Apache-2.0 · Works with Claude, ChatGPT, Gemini, or local Ollama models