OpenZIM MCP Server

🧠 Built for LLM Intelligence

OpenZIM MCP transforms static ZIM archives into dynamic knowledge engines for Large Language Models. Unlike basic file readers, this tool provides intelligent, structured access that LLMs need to effectively navigate and understand vast knowledge repositories.

🚀 Why LLMs Love OpenZIM MCP:

Smart Navigation: Browse by namespace (articles, metadata, media) instead of blind searching
Context-Aware Discovery: Get article structure, relationships, and metadata for deeper understanding
Intelligent Search: Advanced filtering, auto-complete suggestions, and relevance-ranked results
Performance Optimized: Cached operations and pagination prevent timeouts on massive archives
Relationship Mapping: Extract internal/external links to understand content connections

Whether you're building a research assistant, knowledge chatbot, or content analysis system, OpenZIM MCP gives your LLM the structured access patterns it needs to unlock the full potential of offline knowledge archives. No more fumbling through raw text dumps! 🎯

OpenZIM MCP is a modern, secure, and high-performance MCP (Model Context Protocol) server that enables AI models to access and search ZIM format knowledge bases offline.

ZIM (Zeno IMproved) is an open file format developed by the openZIM project, designed specifically for offline storage and access to website content. The format supports high compression rates using Zstandard compression (default since 2021) and enables fast full-text searching, making it ideal for storing entire Wikipedia content and other large reference materials in relatively compact files. The openZIM project is sponsored by Wikimedia CH and supported by the Wikimedia Foundation, ensuring the format's continued development and adoption for offline knowledge access, especially in environments without reliable internet connectivity.

✨ Features

🔒 Security First: Comprehensive input validation and path traversal protection
⚡ High Performance: Intelligent caching and optimized ZIM file operations
🧠 Smart Retrieval: Automatic fallback from direct access to search-based retrieval for reliable entry access
🧪 Well Tested: 90%+ test coverage with comprehensive test suite
🏗️ Modern Architecture: Modular design with dependency injection
📝 Type Safe: Full type annotations throughout the codebase
🔧 Configurable: Flexible configuration with validation
📊 Observable: Structured logging and health monitoring

🚀 Quick Start

Installation

# Clone the repository
git clone <repository-url>
cd openzim-mcp

# Install dependencies
uv sync

# Install development dependencies (optional)
uv sync --dev

Prepare ZIM Files

Download ZIM files (e.g., Wikipedia, Wiktionary, etc.) from the Kiwix Library and place them in a directory:

mkdir ~/zim-files
# Download ZIM files to ~/zim-files/

Running the Server

# Run with the modular architecture
python -m openzim_mcp /path/to/zim/files

# Or using uv
uv run python -m openzim_mcp /path/to/zim/files

# Or using make
make run ZIM_DIR=/path/to/zim/files

MCP Configuration

Add to your MCP client configuration:

{
  "openzim-mcp": {
    "command": "uv",
    "args": [
      "--directory",
      "/path/to/openzim-mcp",
      "run",
      "python",
      "-m",
      "openzim_mcp",
      "/path/to/zim/files"
    ]
  }
}

🛠️ Development

Running Tests

# Run all tests
make test

# Run tests with coverage
make test-cov

# Run specific test file
uv run pytest tests/test_security.py -v

# Run tests with ZIM test data (comprehensive testing)
make test-with-zim-data

# Run integration tests only
make test-integration

# Run tests that require ZIM test data
make test-requires-zim-data

ZIM Test Data Integration

OpenZIM MCP integrates with the official zim-testing-suite for comprehensive testing with real ZIM files:

# Download essential test files (basic testing)
make download-test-data

# Download all test files (comprehensive testing)
make download-test-data-all

# List available test files
make list-test-data

# Clean downloaded test data
make clean-test-data

The test data includes:

Basic files: Small ZIM files for essential testing
Real content: Actual Wikipedia/Wikibooks content for integration testing
Invalid files: Malformed ZIM files for error handling testing
Special cases: Embedded content, split files, and edge cases

Test files are automatically organized by category and priority level.

Code Quality

# Format code
make format

# Run linting
make lint

# Type checking
make type-check

# Run all checks
make check

Project Structure

openzim-mcp/
├── openzim_mcp/             # Main package
│   ├── __init__.py        # Package initialization
│   ├── __main__.py        # Module entry point
│   ├── main.py            # Main entry point
│   ├── server.py          # MCP server implementation
│   ├── config.py          # Configuration management
│   ├── security.py        # Security and validation
│   ├── cache.py           # Caching functionality
│   ├── content_processor.py # Content processing
│   ├── zim_operations.py  # ZIM file operations
│   ├── exceptions.py      # Custom exceptions
│   └── constants.py       # Application constants
├── tests/                 # Test suite
├── pyproject.toml        # Project configuration
├── Makefile              # Development commands
└── README.md             # This file

📚 API Reference

Available Tools

list_zim_files - List all ZIM files in allowed directories

No parameters required.

search_zim_file - Search within ZIM file content

Required parameters:

zim_file_path (string): Path to the ZIM file
query (string): Search query term

Optional parameters:

limit (integer, default: 10): Maximum number of results to return
offset (integer, default: 0): Starting offset for results (for pagination)

get_zim_entry - Get detailed content of a specific entry in a ZIM file

Required parameters:

zim_file_path (string): Path to the ZIM file
entry_path (string): Entry path, e.g., 'A/Some_Article'

Optional parameters:

max_content_length (integer, default: 100000, minimum: 1000): Maximum length of returned content

Smart Retrieval Features:

Automatic Fallback: If direct path access fails, automatically searches for the entry and uses the exact path found
Path Mapping Cache: Caches successful path mappings for improved performance on repeated access
Enhanced Error Guidance: Provides clear guidance when entries cannot be found, suggesting alternative approaches
Transparent Operation: Works seamlessly regardless of path encoding differences (spaces vs underscores, URL encoding, etc.)

get_zim_metadata - Get ZIM file metadata from M namespace entries

Required parameters:

zim_file_path (string): Path to the ZIM file

Returns: JSON string containing ZIM metadata including entry counts, archive information, and metadata entries like title, description, language, creator, etc.

get_main_page - Get the main page entry from W namespace

Required parameters:

zim_file_path (string): Path to the ZIM file

Returns: Main page content or information about the main page entry.

list_namespaces - List available namespaces and their entry counts

Required parameters:

zim_file_path (string): Path to the ZIM file

Returns: JSON string containing namespace information with entry counts, descriptions, and sample entries for each namespace (C, M, W, X, etc.).

browse_namespace - Browse entries in a specific namespace with pagination

Required parameters:

zim_file_path (string): Path to the ZIM file
namespace (string): Namespace to browse (C, M, W, X, A, I, etc.)

Optional parameters:

limit (integer, default: 50, range: 1-200): Maximum number of entries to return
offset (integer, default: 0): Starting offset for pagination

Returns: JSON string containing namespace entries with titles, content previews, and pagination information.

search_with_filters - Search within ZIM file content with advanced filters

Required parameters:

zim_file_path (string): Path to the ZIM file
query (string): Search query term

Optional parameters:

namespace (string): Optional namespace filter (C, M, W, X, etc.)
content_type (string): Optional content type filter (text/html, text/plain, etc.)
limit (integer, default: 10, range: 1-100): Maximum number of results to return
offset (integer, default: 0): Starting offset for pagination

Returns: Filtered search results with namespace and content type information.

get_search_suggestions - Get search suggestions and auto-complete

Required parameters:

zim_file_path (string): Path to the ZIM file
partial_query (string): Partial search query (minimum 2 characters)

Optional parameters:

limit (integer, default: 10, range: 1-50): Maximum number of suggestions to return

Returns: JSON string containing search suggestions based on article titles and content.

get_article_structure - Extract article structure and metadata

Required parameters:

zim_file_path (string): Path to the ZIM file
entry_path (string): Entry path, e.g., 'C/Some_Article'

Returns: JSON string containing article structure including headings, sections, metadata, and word count.

extract_article_links - Extract internal and external links from an article

Required parameters:

zim_file_path (string): Path to the ZIM file
entry_path (string): Entry path, e.g., 'C/Some_Article'

Returns: JSON string containing categorized links (internal, external, media) with titles and metadata.

Examples

Listing ZIM files

{
  "name": "list_zim_files"
}

Response:

Found 1 ZIM files in 1 directories:

[
  {
    "name": "wikipedia_en_100_2025-08.zim",
    "path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "directory": "C:\\zim",
    "size": "310.77 MB",
    "modified": "2025-09-11T10:20:50.148427"
  }
]

Searching ZIM files

{
  "name": "search_zim_file",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "query": "biology",
    "limit": 3
  }
}

Response:

Found 51 matches for "biology", showing 1-3:

## 1. Taxonomy (biology)
Path: Taxonomy_(biology)
Snippet: #  Taxonomy (biology) Part of a series on
---
Evolutionary biology
Darwin's finches by John Gould

  * Index
  * Introduction
  * [Main](Evolution "Evolution")
  * Outline

## 2. Protein
Path: Protein
Snippet: #  Protein A representation of the 3D structure of the protein myoglobin showing turquoise α-helices. This protein was the first to have its structure solved by X-ray crystallography. Toward the right-center among the coils, a prosthetic group called a heme group (shown in gray) with a bound oxygen molecule (red).

## 3. Ant
Path: Ant
Snippet: #  Ant Ants
Temporal range: Late Aptian – Present
---
Fire ants
[Scientific classification](Taxonomy_\(biology\) "Taxonomy \(biology\)")
Kingdom:  | [Animalia](Animal "Animal")
Phylum:  | [Arthropoda](Arthropod "Arthropod")
Class:  | [Insecta](Insect "Insect")
Order:  | Hymenoptera
Infraorder:  | Aculeata
Superfamily:  |
Latreille, 1809[1]
Family:  |
Latreille, 1809

Getting ZIM entries

{
  "name": "get_zim_entry",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "entry_path": "Protein"
  }
}

Response:

# Protein

Path: Protein
Type: text/html
## Content

#  Protein

A representation of the 3D structure of the protein myoglobin showing turquoise α-helices. This protein was the first to have its structure solved by X-ray crystallography. Toward the right-center among the coils, a prosthetic group called a heme group (shown in gray) with a bound oxygen molecule (red).

**Proteins** are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes, and which usually results in protein folding into a specific 3D structure that determines its activity.

A linear chain of amino acid residues is called a polypeptide. A protein contains at least one long polypeptide. Short polypeptides, containing less than 20–30 residues, are rarely considered to be proteins and are commonly called peptides.

... [Content truncated, total of 56,202 characters, only showing first 1,500 characters] ...

Smart Retrieval in Action

Example: Automatic path resolution

{
  "name": "get_zim_entry",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "entry_path": "A/Test Article"
  }
}

Response (showing smart retrieval working):

# Test Article

Requested Path: A/Test Article
Actual Path: A/Test_Article
Type: text/html

## Content

# Test Article

This article demonstrates the smart retrieval system automatically handling
path encoding differences. The system tried "A/Test Article" directly,
then automatically searched and found "A/Test_Article".

... [Content continues] ...

get_server_health - Get server health and statistics

No parameters required.

Returns:

Server status and performance metrics
Cache statistics
Configuration information
Instance tracking information
Conflict detection results

Example Response:

{
  "status": "healthy",
  "server_name": "openzim-mcp",
  "allowed_directories": 1,
  "cache": {
    "enabled": true,
    "size": 1,
    "max_size": 100,
    "ttl_seconds": 3600
  },
  "instance_tracking": {
    "active_instances": 1,
    "conflicts_detected": 0
  }
}

get_server_configuration - Get detailed server configuration

No parameters required.

Returns: Comprehensive server configuration including diagnostics, validation results, and conflict detection.

Example Response:

{
  "configuration": {
    "server_name": "openzim-mcp",
    "allowed_directories": ["/path/to/zim/files"],
    "cache_enabled": true,
    "config_hash": "abc123...",
    "server_pid": 12345
  },
  "diagnostics": {
    "validation_status": "healthy",
    "conflicts_detected": [],
    "warnings": [],
    "recommendations": []
  }
}

diagnose_server_state - Comprehensive server diagnostics

No parameters required.

Returns: Detailed diagnostic information including instance conflicts, configuration validation, file accessibility checks, and actionable recommendations.

Example Response:

{
  "status": "healthy",
  "server_info": {
    "pid": 12345,
    "server_name": "openzim-mcp",
    "config_hash": "abc123..."
  },
  "conflicts": [],
  "issues": [],
  "recommendations": ["Server appears to be running normally"],
  "environment_checks": {
    "directories_accessible": true,
    "cache_functional": true
  }
}

resolve_server_conflicts - Identify and resolve server conflicts

No parameters required.

Returns: Results of conflict resolution including cleanup actions and recommendations.

Example Response:

{
  "status": "success",
  "cleanup_results": {
    "stale_instances_removed": 2
  },
  "conflicts_found": [],
  "actions_taken": ["Removed 2 stale instance files"],
  "recommendations": ["No active conflicts detected"]
}

Additional Search Examples

Computer-related search:

{
  "name": "search_zim_file",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "query": "computer",
    "limit": 2
  }
}

Response:

Found 39 matches for "computer", showing 1-2:

## 1. Video game
Path: Video_game
Snippet: #  Video game First-generation _Pong_ console at the Computerspielemuseum Berlin
---
Platforms

## 2. Protein
Path: Protein
Snippet: #  Protein A representation of the 3D structure of the protein myoglobin showing turquoise α-helices. This protein was the first to have its structure solved by X-ray crystallography. Toward the right-center among the coils, a prosthetic group called a heme group (shown in gray) with a bound oxygen molecule (red).

Getting detailed content:

{
  "name": "get_zim_entry",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "entry_path": "Evolution",
    "max_content_length": 1500
  }
}

Response:

# Evolution

Path: Evolution
Type: text/html
## Content

#  Evolution

Part of the Biology series on
---
****
Mechanisms and processes

  * Adaptation
  * Genetic drift
  * Gene flow
  * History of life
  * Maladaptation
  * Mutation
  * Natural selection
  * Neutral theory
  * Population genetics
  * Speciation

... [Content truncated, total of 110,237 characters, only showing first 1,500 characters] ...

🎯 Advanced Knowledge Retrieval Examples

Getting ZIM metadata:

{
  "name": "get_zim_metadata",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim"
  }
}

Response:

{
  "entry_count": 100000,
  "all_entry_count": 120000,
  "article_count": 80000,
  "media_count": 20000,
  "metadata_entries": {
    "Title": "Wikipedia (English)",
    "Description": "Wikipedia articles in English",
    "Language": "eng",
    "Creator": "Kiwix",
    "Date": "2025-08-15"
  }
}

Browsing a namespace:

{
  "name": "browse_namespace",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "namespace": "C",
    "limit": 5,
    "offset": 0
  }
}

Response:

{
  "namespace": "C",
  "total_in_namespace": 80000,
  "offset": 0,
  "limit": 5,
  "returned_count": 5,
  "has_more": true,
  "entries": [
    {
      "path": "C/Biology",
      "title": "Biology",
      "content_type": "text/html",
      "preview": "Biology is the scientific study of life..."
    }
  ]
}

Filtered search:

{
  "name": "search_with_filters",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "query": "evolution",
    "namespace": "C",
    "content_type": "text/html",
    "limit": 3
  }
}

Getting article structure:

{
  "name": "get_article_structure",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "entry_path": "C/Evolution"
  }
}

Response:

{
  "title": "Evolution",
  "path": "C/Evolution",
  "content_type": "text/html",
  "headings": [
    {"level": 1, "text": "Evolution", "id": "evolution"},
    {"level": 2, "text": "History", "id": "history"},
    {"level": 2, "text": "Mechanisms", "id": "mechanisms"}
  ],
  "sections": [
    {
      "title": "Evolution",
      "level": 1,
      "content_preview": "Evolution is the change in heritable traits...",
      "word_count": 150
    }
  ],
  "word_count": 5000
}

Getting search suggestions:

{
  "name": "get_search_suggestions",
  "arguments": {
    "zim_file_path": "C:\\zim\\wikipedia_en_100_2025-08.zim",
    "partial_query": "bio",
    "limit": 5
  }
}

Response:

{
  "partial_query": "bio",
  "suggestions": [
    {"text": "Biology", "path": "C/Biology", "type": "title_start_match"},
    {"text": "Biochemistry", "path": "C/Biochemistry", "type": "title_start_match"},
    {"text": "Biodiversity", "path": "C/Biodiversity", "type": "title_start_match"}
  ],
  "count": 3
}

🔧 Server Management and Diagnostics Examples

Getting server health:

{
  "name": "get_server_health"
}

Response:

{
  "status": "healthy",
  "server_name": "openzim-mcp",
  "uptime_info": {
    "process_id": 12345,
    "started_at": "2025-09-14T10:30:00"
  },
  "cache_performance": {
    "enabled": true,
    "size": 15,
    "max_size": 100,
    "hit_rate": 0.85
  },
  "instance_tracking": {
    "active_instances": 1,
    "conflicts_detected": 0
  }
}

Diagnosing server state:

{
  "name": "diagnose_server_state"
}

Response:

{
  "status": "healthy",
  "server_info": {
    "pid": 12345,
    "server_name": "openzim-mcp",
    "config_hash": "abc123def456..."
  },
  "conflicts": [],
  "issues": [],
  "recommendations": ["Server appears to be running normally. No issues detected."],
  "environment_checks": {
    "directories_accessible": true,
    "cache_functional": true,
    "zim_files_found": 5
  }
}

Resolving server conflicts:

{
  "name": "resolve_server_conflicts"
}

Response:

{
  "status": "success",
  "cleanup_results": {
    "stale_instances_removed": 2,
    "files_cleaned": ["/home/user/.openzim_mcp_instances/server_99999.json"]
  },
  "conflicts_found": [],
  "actions_taken": ["Removed 2 stale instance files"],
  "recommendations": ["No active conflicts detected after cleanup"]
}

🎯 ZIM Entry Retrieval Best Practices

Smart Retrieval System

OpenZIM MCP implements an intelligent entry retrieval system that automatically handles path encoding inconsistencies common in ZIM files:

How It Works:

Direct Access First: Attempts to retrieve the entry using the provided path exactly as given
Automatic Fallback: If direct access fails, automatically searches for the entry using various search terms
Path Mapping Cache: Caches successful path mappings to improve performance for repeated access
Enhanced Error Guidance: Provides clear guidance when entries cannot be found

Benefits for LLM Users:

Transparent Operation: No need to understand ZIM path encoding complexities
Single Tool Call: Eliminates the need for manual search-first methodology
Reliable Results: Consistent success across different path formats (spaces vs underscores, URL encoding, etc.)
Performance Optimized: Cached mappings improve repeated access speed

Example Scenarios Handled Automatically:

A/Test Article → A/Test_Article (space to underscore conversion)
C/Café → C/Caf%C3%A9 (URL encoding differences)
A/Some-Page → A/Some_Page (hyphen to underscore conversion)

Usage Recommendations

For Direct Entry Access:

{
  "name": "get_zim_entry",
  "arguments": {
    "zim_file_path": "/path/to/file.zim",
    "entry_path": "A/Article_Name"
  }
}

When Entry Not Found: The system will automatically provide guidance:

Entry not found: 'A/Article_Name'.
The entry path may not exist in this ZIM file.
Try using search_zim_file() to find available entries,
or browse_namespace() to explore the file structure.

⚠️ Important Notes and Limitations

Content Length Requirements

The max_content_length parameter for get_zim_entry must be at least 1000 characters
Content longer than the specified limit will be truncated with a note showing the total character count

Search Behavior

Search results may include articles that contain the search terms in various contexts
Results are ranked by relevance but may not always be directly related to the primary meaning of the search term
Search snippets provide a preview of the content but may not show the exact location where the search term appears

File Format Support

Currently supports ZIM files (Zeno IMproved format)
Tested with Wikipedia ZIM files (e.g., wikipedia_en_100_2025-08.zim)
File paths must be properly escaped in JSON (use \\ for Windows paths)

🔄 Multi-Server Instance Management

OpenZIM MCP includes advanced multi-server instance tracking and conflict detection to ensure reliable operation when multiple server instances are running.

Instance Tracking Features

Automatic Instance Registration: Each server instance is automatically registered with a unique process ID and configuration hash
Conflict Detection: Detects when multiple servers with different configurations are accessing the same directories
Stale Instance Cleanup: Automatically identifies and cleans up orphaned instance files from terminated processes
Configuration Validation: Ensures all server instances use compatible configurations

Conflict Types

Configuration Mismatch: Multiple servers with different settings accessing the same directories
Multiple Instances: Multiple servers running simultaneously (may cause confusion)
Stale Instances: Orphaned instance files from terminated processes

Automatic Conflict Warnings

OpenZIM MCP automatically includes conflict warnings in search results and file listings when issues are detected:

🔍 **Server Conflict Detected**
⚠️ Configuration mismatch with server PID 12345. Search results may be inconsistent.
💡 Use 'resolve_server_conflicts()' to fix these issues.

Best Practices

Use diagnose_server_state() regularly to check for conflicts
Run resolve_server_conflicts() to clean up stale instances
Ensure all server instances use the same configuration when accessing shared directories
Monitor server health with get_server_health() for instance tracking information

🔧 Configuration

OpenZIM MCP supports configuration through environment variables with the OPENZIM_MCP_ prefix:

# Cache configuration
export OPENZIM_MCP_CACHE__ENABLED=true
export OPENZIM_MCP_CACHE__MAX_SIZE=200
export OPENZIM_MCP_CACHE__TTL_SECONDS=7200

# Content configuration
export OPENZIM_MCP_CONTENT__MAX_CONTENT_LENGTH=200000
export OPENZIM_MCP_CONTENT__SNIPPET_LENGTH=2000
export OPENZIM_MCP_CONTENT__DEFAULT_SEARCH_LIMIT=20

# Logging configuration
export OPENZIM_MCP_LOGGING__LEVEL=DEBUG
export OPENZIM_MCP_LOGGING__FORMAT="%(asctime)s - %(name)s - %(levelname)s - %(message)s"

# Server configuration
export OPENZIM_MCP_SERVER_NAME=my_openzim_mcp_server

Configuration Options

Setting	Default	Description
`OPENZIM_MCP_CACHE__ENABLED`	`true`	Enable/disable caching
`OPENZIM_MCP_CACHE__MAX_SIZE`	`100`	Maximum cache entries
`OPENZIM_MCP_CACHE__TTL_SECONDS`	`3600`	Cache TTL in seconds
`OPENZIM_MCP_CONTENT__MAX_CONTENT_LENGTH`	`100000`	Max content length
`OPENZIM_MCP_CONTENT__SNIPPET_LENGTH`	`1000`	Max snippet length
`OPENZIM_MCP_CONTENT__DEFAULT_SEARCH_LIMIT`	`10`	Default search result limit
`OPENZIM_MCP_LOGGING__LEVEL`	`INFO`	Logging level
`OPENZIM_MCP_LOGGING__FORMAT`	`%(asctime)s - %(name)s - %(levelname)s - %(message)s`	Log message format
`OPENZIM_MCP_SERVER_NAME`	`openzim-mcp`	Server instance name

🔒 Security Features

Path Traversal Protection: Secure path validation prevents access outside allowed directories
Input Sanitization: All user inputs are validated and sanitized
Resource Management: Proper cleanup of ZIM archive resources
Error Handling: Sanitized error messages prevent information disclosure
Type Safety: Full type annotations prevent type-related vulnerabilities

🚀 Performance Features

Intelligent Caching: LRU cache with TTL for frequently accessed content
Resource Pooling: Efficient ZIM archive management
Optimized Content Processing: Fast HTML to text conversion
Lazy Loading: Components initialized only when needed
Memory Management: Proper cleanup and resource management

🧪 Testing

The project includes comprehensive testing with 90%+ coverage using both mock data and real ZIM files:

Test Categories

Unit Tests: Individual component testing with mocks
Integration Tests: End-to-end functionality testing with real ZIM files
Security Tests: Path traversal and input validation testing
Performance Tests: Cache and resource management testing
Format Compatibility: Testing with various ZIM file formats and versions
Error Handling: Testing with invalid and malformed ZIM files

Test Infrastructure

OpenZIM MCP uses a hybrid testing approach:

Mock-based tests: Fast unit tests using mocked libzim components
Real ZIM file tests: Integration tests using official zim-testing-suite files
Automatic test data management: Download and organize test files as needed

Test Data Sources

Built-in test data: Basic test files included in the repository
zim-testing-suite integration: Official test files from the OpenZIM project
Environment variable support: ZIM_TEST_DATA_DIR for custom test data locations

# Run tests with coverage report
make test-cov

# View coverage report
open htmlcov/index.html

# Run comprehensive tests with real ZIM files
make test-with-zim-data

Test Markers

Tests are organized with pytest markers:

@pytest.mark.requires_zim_data: Tests requiring ZIM test data files
@pytest.mark.integration: Integration tests
@pytest.mark.slow: Long-running tests

📈 Monitoring

OpenZIM MCP provides built-in monitoring capabilities:

Health Checks: Server health and status monitoring
Cache Metrics: Cache hit rates and performance statistics
Structured Logging: JSON-formatted logs for easy parsing
Error Tracking: Comprehensive error logging and tracking

🤝 Contributing

Fork the repository
Create a feature branch (git checkout -b feature/amazing-feature)
Make your changes
Run tests (make check)
Commit your changes (git commit -m 'Add amazing feature')
Push to the branch (git push origin feature/amazing-feature)
Open a Pull Request

Development Guidelines

Follow PEP 8 style guidelines
Add type hints to all functions
Write tests for new functionality
Update documentation as needed
Ensure all tests pass before submitting

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

Kiwix for the ZIM format and libzim library
MCP for the Model Context Protocol
The open-source community for the excellent libraries used in this project

Name		Name	Last commit message	Last commit date
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.github		.github
docs		docs
openzim_mcp		openzim_mcp
scripts		scripts
tests		tests
website		website
wiki-content		wiki-content
.flake8		.flake8
.gitignore		.gitignore
.pre-commit-config.yaml		.pre-commit-config.yaml
.python-version		.python-version
CHANGELOG.md		CHANGELOG.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
SECURITY.md		SECURITY.md
pyproject.toml		pyproject.toml
uv.lock		uv.lock

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cameronrye/openzim-mcp

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OpenZIM MCP Server

🧠 Built for LLM Intelligence

✨ Features

🚀 Quick Start

Installation

Prepare ZIM Files

Running the Server

MCP Configuration

🛠️ Development

Running Tests

ZIM Test Data Integration

Code Quality

Project Structure

📚 API Reference

Available Tools

list_zim_files - List all ZIM files in allowed directories

search_zim_file - Search within ZIM file content

get_zim_entry - Get detailed content of a specific entry in a ZIM file

get_zim_metadata - Get ZIM file metadata from M namespace entries

get_main_page - Get the main page entry from W namespace

list_namespaces - List available namespaces and their entry counts

browse_namespace - Browse entries in a specific namespace with pagination

search_with_filters - Search within ZIM file content with advanced filters

get_search_suggestions - Get search suggestions and auto-complete

get_article_structure - Extract article structure and metadata

extract_article_links - Extract internal and external links from an article

Examples

Listing ZIM files

Searching ZIM files

Getting ZIM entries

Smart Retrieval in Action

get_server_health - Get server health and statistics

get_server_configuration - Get detailed server configuration

diagnose_server_state - Comprehensive server diagnostics

resolve_server_conflicts - Identify and resolve server conflicts

Additional Search Examples

🎯 Advanced Knowledge Retrieval Examples

🔧 Server Management and Diagnostics Examples

🎯 ZIM Entry Retrieval Best Practices

Smart Retrieval System

Usage Recommendations

⚠️ Important Notes and Limitations

Content Length Requirements

Search Behavior

File Format Support

🔄 Multi-Server Instance Management

Instance Tracking Features

Conflict Types

Automatic Conflict Warnings

Best Practices

🔧 Configuration

Configuration Options

🔒 Security Features

🚀 Performance Features

🧪 Testing

Test Categories

Test Infrastructure

Test Data Sources

Test Markers

📈 Monitoring

🤝 Contributing

Development Guidelines

📄 License

🙏 Acknowledgments

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