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PDF to PNG MCP Server

by truaxki
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Python
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PDF to PNG MCP Server

A Model Context Protocol (MCP) server that provides PDF to PNG conversion capabilities. This server allows you to convert PDF documents into PNG images with a simple MCP tool call.

Prerequisites

This server requires the Model Context Protocol (MCP). If you're new to MCP, start by installing the SDK:

uv pip install mcp

Additional requirements:

  • Python 3.10 or higher

  • uv package manager

  • poppler (required for pdf2image)

Installing Poppler

  • Windows: Download and install from poppler-windows

  • macOS: brew install poppler

  • Linux: sudo apt-get install poppler-utils

Related MCP server: MCP PDF Reader

Installation

  1. Clone this repository:

    git clone https://github.com/truaxki/mcp-Pdf2png.git
cd mcp-Pdf2png

  2. Create and activate a virtual environment:

    uv venv
# Windows
.venv\Scripts\activate
# Unix/macOS
source .venv/bin/activate

  3. Install the package:

    uv pip install -e .

Usage

1. Configure MCP Client

Add the server configuration to your claude_desktop_config.json. The file is typically located in:

  • Windows: %APPDATA%\Claude Desktop\config\claude_desktop_config.json

  • macOS/Linux: ~/.config/Claude Desktop/config/claude_desktop_config.json

{
  "mcpServers": {
    "pdf2png": {
      "command": "uv",
      "args": [
        "--directory",
        "/absolute/path/to/mcp-Pdf2png",
        "run",
        "pdf2png"
      ]
    }
  }
}

Note: Replace /absolute/path/to/mcp-Pdf2png with the actual path where you cloned the repository.

2. Using the Server

The server provides a single tool pdf2png with these parameters:

  • read_file_path: Absolute path to the input PDF file

  • write_folder_path: Absolute path to the directory where PNG files should be saved

Output:

  • Each PDF page is converted to a PNG image

  • Files are named page_1.png, page_2.png, etc.

  • Returns a success message with the conversion count

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Available Tools

1 tool
pdf2pngC

Converts PDFs to images in PNG format.

ParametersJSON Schema
NameRequiredDescriptionDefault
read_file_pathYes
write_folder_pathYes

TDQS

C2.8/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions conversion but lacks details on permissions, rate limits, error handling, or output behavior (e.g., whether it overwrites files). This leaves significant gaps for a tool that performs file operations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with zero waste, front-loading the core functionality. It's appropriately sized for a straightforward tool, earning a high score for conciseness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (file conversion with 2 parameters), lack of annotations, and no output schema, the description is incomplete. It doesn't address key aspects like what the tool returns, error conditions, or file handling specifics, leaving the agent with insufficient context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate by explaining parameters. It adds no meaning beyond the schema, failing to clarify what 'read_file_path' and 'write_folder_path' represent (e.g., input PDF file path and output directory for PNGs).

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose with a specific verb ('converts') and resource ('PDFs to images in PNG format'), making it immediately understandable. It doesn't need to distinguish from siblings since none exist, so a 4 is appropriate rather than a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives, prerequisites, or contextual constraints. It merely states what the tool does without indicating appropriate scenarios or limitations.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 1 tool updatev1.0.0
    • Addedpdf2png
Deploy Server
One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

TDQS

B3/5.0

Scored across 1 tool

Disambiguation5/5

With only one tool, there is no possibility of ambiguity or overlap between tools. The tool's purpose is singular and clearly defined.

Naming Consistency5/5

A single tool inherently has perfect naming consistency, as there are no other tools to compare against. The name 'pdf2png' is descriptive and follows a clear pattern.

Tool Count2/5

One tool is too few for most practical server purposes, as it limits functionality to a single operation. For a PDF conversion server, this feels thin and under-scoped, lacking features like batch processing or format options.

Completeness2/5

The server is severely incomplete for a PDF conversion domain. It only converts PDFs to PNGs, missing obvious operations like converting to other image formats (e.g., JPEG, TIFF), handling multiple pages, or providing configuration options (e.g., resolution, quality).

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

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