Onepdf

97 PDF tools for Claude, Cursor & Codex.

Give your AI assistant the power to merge, split, compress, convert, encrypt, add visible signatures, watermark, and analyze PDFs — all with natural language. Core tools run locally; professional document conversions can use optional local programs.

Official guide: 1pdf.best/mcp

Quick Start

OpenAI Codex

codex mcp add 1pdf -- npx -y onepdf-mcp-server

Verify with codex mcp list, restart Codex, then ask:

Use 1PDF to merge report1.pdf and report2.pdf.

Claude Code

claude mcp add 1pdf -- npx -y onepdf-mcp-server

Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "1pdf": {
      "command": "npx",
      "args": ["-y", "onepdf-mcp-server"]
    }
  }
}

Cursor

Settings → MCP → Add Server:

Command: npx
Args: -y, onepdf-mcp-server

Windsurf

Settings → MCP → Add Server:

npx -y onepdf-mcp-server

Check Available Capabilities

Ask your Agent to call system_status before workflows that use Office, MOBI, DjVu, XPS, Ghostscript, or PDF/A conversion.

The status response reports:

• the 1PDF MCP and Node versions;
• detected optional programs and versions;
• tools enabled by each program;
• platform-specific installation instructions for missing programs.

Core PDF tools run with the npm package. Professional document conversion uses optional local programs. Missing dependencies return MISSING_DEPENDENCY; 1PDF does not report a successful conversion when a required program is missing.

Capability Boundaries

• sign_pdf adds a visible signature appearance. It does not provide certificate-backed authenticity.
• pdf_to_pdfa and font_to_outline require Ghostscript. PDF/A conversion can optionally require independent veraPDF validation with validate: true.
• ocg_manager accurately lists Optional Content Groups. Persisting layer visibility is not available yet and returns a structured failure without writing a copied output.
• deskew_pdf automatically detects and corrects page tilt locally. The corrected output is rasterized, so selectable text and vector elements become images; use OCR afterward when searchable text is required.
• compress uses a lossless structural rewrite at high quality, Ghostscript image resampling at low quality, and the best available medium-quality path. Its result reports when an already-compact PDF did not become smaller.

What You Can Do

Once installed, just talk to your AI assistant naturally:

"Merge report1.pdf and report2.pdf"
"Split this PDF into pages 1-3 and 5"
"Encrypt this PDF with password mypass123"
"Add a DRAFT watermark to this PDF"
"Convert these JPG images to a single PDF"
"Extract all tables from this PDF"
"Convert this Markdown file to PDF"

All 97 Tools

Organize & Manage (12)

merge · split · extract_pages · delete_pages · sort_pages · reverse_pages · add_blank_page · rotate · alternate_merge · view_metadata · edit_metadata · page_dimensions

Edit & Annotate (7)

watermark · page_number · add_header_footer · add_stamps · crop_pdf · flatten_pdf · bates_number_pdf

Optimize & Security (6)

compress · encrypt · decrypt · redact_pdf · remove_metadata · invert_colors

Convert — Image → PDF (9)

image_to_pdf · jpg_to_pdf · png_to_pdf · webp_to_pdf · bmp_to_pdf · tiff_to_pdf · svg_to_pdf · heic_to_pdf · psd_to_pdf

Convert — PDF → Image (6)

pdf_to_png · pdf_to_jpg · pdf_to_webp · pdf_to_bmp · pdf_to_tiff · pdf_to_zip

Document Conversion (10)

markdown_to_pdf · pdf_to_markdown · txt_to_pdf · json_to_pdf · email_to_pdf · cbz_to_pdf · epub_to_pdf · rtf_to_pdf · pdf_to_greyscale · pdf_to_pdfa

Page Layout (7)

divide_pages · combine_single_page · nup_pdf · pdf_booklet · posterize_pdf · grid_combine · fix_page_size

Analysis & Info (9)

pdf_reader · get_page_text · pdf_search · get_pdf_chunks · compare_pdfs · remove_blank_pages · pdf_to_json · extract_tables · table_of_contents

Annotations & Metadata (6)

edit_bookmarks · extract_attachments · remove_annotations · background_color · change_permissions · ocg_manager

Optimize (4)

repair_pdf · linearize_pdf · sanitize_pdf · remove_restrictions

Forms & Signing (3)

sign_pdf · form_filler · form_creator

AI Tools (3)

ai_summarize · ai_chat_with_pdf · ai_extract_info

Specialized (6)

deskew_pdf · rasterize_pdf · extract_images · add_attachments · edit_attachments · font_to_outline

External Tools (9) — require LibreOffice/Calibre/DjVuLibre

word_to_pdf · excel_to_pdf · powerpoint_to_pdf · pdf_to_docx · pdf_to_excel · pdf_to_ppt · mobi_to_pdf · djvu_to_pdf · xps_to_pdf

Core tools process files locally. Nine document-conversion tools use optional LibreOffice, Calibre, or DjVuLibre installations; system_status reports their availability before an Agent starts a workflow.

Requirements

• Node.js 20.9+
• Claude Desktop, Cursor, Windsurf, or Claude Code
• Optional: LibreOffice, Calibre, DjVuLibre, Ghostscript, and veraPDF for specialized conversions and validation

Development

git clone https://github.com/WendongAI/onepdf-mcp-server.git
cd onepdf-mcp-server
npm install
npm run build          # TypeScript build
npm test               # native tools + quality + runtime + MCP E2E
npm run test:package   # install and start the packed npm tarball

License

MIT © 1pdf