View, annotate, and sign PDFs in a live interactive viewer. Mark up contracts, fill forms with visual feedback, stamp approvals, and place signatures — then download the annotated copy.
- Open PDFs from local files or academic sources (arXiv, bioRxiv, etc.)
- Annotate collaboratively — Claude proposes highlights, notes, and stamps section by section; you review each batch in the viewer
- Fill forms — guided field-by-field completion with live preview
- Sign documents — place signature/initials images on the page
- Stamp approvals — APPROVED, DRAFT, CONFIDENTIAL, or any custom label
- Download — export the annotated PDF from the viewer toolbar
| Command | What it does |
|---|---|
/pdf-viewer:open |
Open a PDF in the interactive viewer |
/pdf-viewer:annotate |
Walk through the document, propose + apply markup, review together |
/pdf-viewer:fill-form |
Fill PDF form fields interactively |
/pdf-viewer:sign |
Place a signature or initials image on the page |
This plugin is for interactive, visual workflows — when you want to see the document, mark it up, and download an annotated copy.
If you just want Claude to summarize or extract text from a PDF, don't use this plugin. Claude can read PDF files natively and that's faster for pure ingestion.
This plugin uses a local MCP server (@modelcontextprotocol/server-pdf)
that runs on your machine via npx. No API keys or remote services —
the PDF server starts automatically when the plugin loads.
- Node.js >= 18
- Internet for remote PDFs (arXiv, etc.)
- Local files (file paths in your working directory)
- arXiv —
/abs/URLs auto-convert to PDF - Any direct HTTPS PDF URL (bioRxiv, Zenodo, OSF, etc. — use the PDF link, not the landing page)
/pdf-viewer:sign places a visual signature image on the page. It is not
a certified or cryptographic digital signature. For legally binding
e-signatures, use a dedicated signing service.