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Works with

Claude CodeClaude DesktopCursorVS CodeClineCodex CLIOpenClaw+ any MCP client

Install to Claude Code

This server doesn't publish a one-line install command. Follow the setup in the source repository.

Summary

PDF reader for vision LLMs. Auto-detects text corruption and switches to image mode.

README.md

pdf4vllm

![License: MIT](https://opensource.org/licenses/MIT) ![Python 3.10+](https://www.python.org/downloads/) ![PyPI](https://pypi.org/project/pdf4vllm-mcp/) ![Open in Gitpod](https://gitpod.io/#https://github.com/PyJudge/pdf4vllm-mcp)

PDF reading MCP server optimized for vision LLMs.

<!-- mcp-name: io.github.PyJudge/pdf4vllm -->

<details> <summary><b>한국어</b></summary>

문제

| 방식 | 문제점 | |------|--------| | 텍스트 추출 | 인코딩 깨짐 → 쓰레기 출력, 이미지-텍스트 순서 뒤섞임 | | 이미지 변환 | 토큰 폭발 (특히 페이지 많을 때) |

해결

pdf4vllm은 PDF가 지저분하다고 가정합니다.

  • 텍스트 손상 자동 감지 → 이미지로 자동 전환
  • 읽기 순서 보존 (텍스트 → 표 → 이미지 블록 순서대로)
  • 페이지 제한으로 컨텍스트 오버플로우 방지
  • 불필요한 이미지 자동 필터링 (로고, 선, 헤더/푸터)

설치

pip install pdf4vllm-mcp
# 또는
uvx pdf4vllm-mcp

Claude Desktop 설정

git clone https://github.com/PyJudge/pdf4vllm-mcp.git
cd pdf4vllm-mcp
python scripts/install_mcp.py

또는 직접 설정 (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "pdf4vllm": {
      "command": "/python/경로",
      "args": ["/pdf4vllm-mcp/경로/src/server.py"]
    }
  }
}

도구

| 도구 | 설명 | |------|------| | list_pdfs | PDF 파일 찾기 (glob 패턴 name_pattern 지원) | | read_pdf | PDF 내용 블록으로 추출 | | grep_pdf | PDF 내 텍스트 검색 (pdfgrep 설치 필요) |

추출 모드

| 모드 | 설명 | |------|------| | auto (기본) | 텍스트 추출 시도 → 손상 감지 시 이미지로 전환 | | text_only | 텍스트/표만 추출, 이미지 없음 | | image_only | 페이지를 이미지로만 렌더링 |

</details>

---

Problem

| Approach | Issue | |----------|-------| | Text extraction | Encoding corruption → garbage output, mixed text-image ordering | | Image conversion | Token explosion (especially with many pages) |

Solution

pdf4vllm assumes PDFs are messy.

  • Auto-detects text corruption → switches to image automatically
  • Preserves reading order (text → table → image blocks in sequence)
  • Page limits prevent context overflow
  • Filters unnecessary images (logos, lines, headers/footers)
PDF Input
    ↓
Corruption Detection (pdfminer.six + pattern analysis)
    ↓
┌─────────────┬─────────────┐
│  Corrupted  │    Clean    │
│  → Image    │  → Text +   │
│    only     │    Tables + │
│             │    Images   │
└─────────────┴─────────────┘
    ↓
Ordered Blocks (JSON)

Install

pip install pdf4vllm-mcp
# or run without installing
uvx pdf4vllm-mcp

Claude Desktop Setup

git clone https://github.com/PyJudge/pdf4vllm-mcp.git
cd pdf4vllm-mcp
python scripts/install_mcp.py

Or manually edit ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "pdf4vllm": {
      "command": "/path/to/python",
      "args": ["/path/to/pdf4vllm-mcp/src/server.py"]
    }
  }
}

Claude Code Setup

Create .mcp.json in your project:

{
  "mcpServers": {
    "pdf4vllm": {
      "command": "uvx",
      "args": ["pdf4vllm-mcp"]
    }
  }
}

Tools

| Tool | Description | |------|-------------| | list_pdfs | Find PDF files with glob filtering (name_pattern) | | read_pdf | Extract PDF content as ordered blocks | | grep_pdf | Search text in PDFs using pdfgrep (requires pdfgrep installed) |

Extraction Modes

| Mode | Description | |------|-------------| | auto (default) | Try text extraction → switch to image if corrupted | | text_only | Text/tables only, no images | | image_only | Render pages as images only |

Output Format

{
  "pages": [
    {
      "page_number": 1,
      "content_blocks": [
        {"type": "text", "content": "..."},
        {"type": "table", "content": "| A | B |"},
        {"type": "image", "content": "[IMAGE_0]"}
      ]
    }
  ]
}

When text is corrupted: ``json { "page_number": 2, "content_blocks": [], "text_corrupted": true, "page_image": "[IMAGE_1]" } ``

Configuration

config.json or environment variables:

{
  "max_pages_per_request": 10,
  "max_image_dimension": 842,
  "page_image_dpi": 100
}
export PDF_MAX_PAGES=20
export PDF_PAGE_IMAGE_DPI=150

Test Server

pip install pdf4vllm-mcp[test]
python test_server.py
# → http://localhost:8000

License

MIT

---

GitHub · PyPI

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