Stack Overflow MCP Server
A Model Context Protocol (MCP) server that provides comprehensive tools for interacting with Stack Overflow through the Stack Exchange API. This server enables AI assistants to search questions, get detailed answers, and explore Stack Overflow content through a standardized interface.

🚀 Features
- Question Search - Advanced search with multiple filters and sorting options
- Question Details - Get comprehensive information including answers with body content
- Tag-based Search - Find questions by specific tags
- Top Answers - Retrieve highly-voted answers from the community
- Type Safety - Full Pydantic validation with structured response models
- Error Handling - Comprehensive error reporting and graceful failure modes
📦 Installation
Using uvx (Recommended)
uvx stack-overflow-mcp-light
Using uv
uv add stack-overflow-mcp-light
uv run stack-overflow-mcp-light
Using pip
pip install stack-overflow-mcp-light
stack-overflow-mcp-light
⚙️ Configuration
Environment Variables
STACK_EXCHANGE_API_KEY (Optional): Stack Exchange API key for increased rate limits. Get one at Stack Apps
STACK_OVERFLOW_MCP_SHOW_LOGS (Optional): Set to "true" to enable detailed logging
💡 API Key: While optional, an API key significantly increases your rate limits from 300 to 10,000 requests per day.
Transport Types
stdio (default) - Standard input/output, client launches server automatically
http (recommended for remote) - Modern HTTP transport (aliases: streamable-http, streamable_http)
sse (legacy) - Server-Sent Events transport (deprecated)
🚀 Quick Start (uvx)
Stdio Transport
{
"mcpServers": {
"stack-overflow": {
"command": "uvx",
"args": ["--no-progress", "stack-overflow-mcp-light"],
"env": {
"STACK_EXCHANGE_API_KEY": "your_api_key_here",
"STACK_OVERFLOW_MCP_SHOW_LOGS": "false"
}
}
}
}
HTTP Transport
Start server:
export STACK_EXCHANGE_API_KEY="your_api_key_here"
uvx --no-progress stack-overflow-mcp-light --transport http --port 8000 --host 0.0.0.0
Client config:
{
"mcpServers": {
"stack-overflow": {
"url": "http://localhost:8000/mcp",
"transport": "http"
}
}
}
SSE Transport
Start server:
export STACK_EXCHANGE_API_KEY="your_api_key_here"
uvx --no-progress stack-overflow-mcp-light --transport sse --port 8000 --host 0.0.0.0
Client config:
{
"mcpServers": {
"stack-overflow": {
"url": "http://localhost:8000/sse",
"transport": "sse"
}
}
}
🔧 Alternative Commands
Stdio with uv run --with
{
"mcpServers": {
"stack-overflow": {
"command": "uv",
"args": ["run", "--with", "stack-overflow-mcp-light", "stack-overflow-mcp-light"],
"env": {
"STACK_EXCHANGE_API_KEY": "your_api_key_here",
"STACK_OVERFLOW_MCP_SHOW_LOGS": "false"
}
}
}
}
Stdio with uv run --directory (Local Development)
{
"mcpServers": {
"stack-overflow": {
"command": "uv",
"args": ["run", "--directory", "/path/to/stack-overflow-mcp-light", "stack-overflow-mcp-light"],
"env": {
"STACK_EXCHANGE_API_KEY": "your_api_key_here",
"STACK_OVERFLOW_MCP_SHOW_LOGS": "true"
}
}
}
}
Stdio with pip Install
{
"mcpServers": {
"stack-overflow": {
"command": "stack-overflow-mcp-light",
"args": [],
"env": {
"STACK_EXCHANGE_API_KEY": "your_api_key_here",
"STACK_OVERFLOW_MCP_SHOW_LOGS": "false"
}
}
}
}
HTTP/SSE Alternative Commands
All transport types can use these alternative commands:
export STACK_EXCHANGE_API_KEY="your_api_key_here"
uv run --with stack-overflow-mcp-light stack-overflow-mcp-light --transport http --port 8000
export STACK_EXCHANGE_API_KEY="your_api_key_here"
cd /path/to/stack-overflow-mcp-light
uv run stack-overflow-mcp-light --transport http --port 8000
export STACK_EXCHANGE_API_KEY="your_api_key_here"
stack-overflow-mcp-light --transport http --port 8000
🛠️ Available Tools
❓ Question Tools (3 tools)
search_questions
Search Stack Overflow questions with advanced filters.
- Input: Search parameters including:
q - Free-form text search
tagged - Semi-colon delimited list of tags
intitle - Search in question titles
nottagged - Exclude these tags
body - Text in question body
accepted - Has accepted answer (boolean)
closed - Question is closed (boolean)
answers - Minimum number of answers
views - Minimum view count
sort - Sort criteria ("activity", "votes", "creation", "hot", "week", "month", "relevance")
order - Sort order ("asc" or "desc")
page - Page number (1-25)
page_size - Items per page (1-100)
- Output: Array of question items with essential fields:
question_id - Question ID
is_answered - Whether the question has answers
score - Question score
link - Link to the question
title - Question title
fetch_question_answers
Fetch a specific question, always including answers with body content sorted by the specified criteria.
- Input: Question details request including:
question_id - Question ID (required)
sort - Answer sort criteria ("activity", "votes", "creation") - defaults to "votes"
order - Sort order ("asc" or "desc") - defaults to "desc"
page_size - Maximum number of answers to return (1-100) - defaults to 30
- Output: QuestionItem with detailed information including:
question_id - Question ID
is_answered - Whether the question has answers
score - Question score
link - Link to the question
title - Question title
answers - Array of AnswerItem objects with:
answer_id - Answer ID
is_accepted - Whether the answer is accepted
score - Answer score
body - Answer body content
search_questions_by_tag
Search questions that have a specific tag.
- Input:
tag (tag name), sort, order, page, page_size
- Output: Array of question items with essential fields:
question_id - Question ID
is_answered - Whether the question has answers
score - Question score
link - Link to the question
title - Question title
🧪 Testing
The project includes comprehensive tests covering all tools:
make test
make test-cov
uv run pytest tests/test_server.py::TestQuestionTools -v
🔧 Development
Setup Development Environment
git clone https://github.com/midodimori/stack-overflow-mcp-light.git
cd stack-overflow-mcp-light
make install-dev
make test
make format
make lint
make run
make help
Project Structure
stack-overflow-mcp-light/
├── src/stack_overflow_mcp_light/
│ ├── __init__.py
│ ├── server.py # MCP server implementation
│ ├── logging_config.py # Logging configuration
│ ├── models/ # Pydantic models
│ │ ├── __init__.py
│ │ ├── requests.py # Request models
│ │ └── responses.py # Response models
│ └── tools/ # Tool implementations
│ ├── __init__.py
│ ├── base_client.py # Base client for Stack Exchange API
│ └── questions.py # Question search and retrieval tools
├── tests/
│ ├── test_server.py # Tool function tests
│ └── test_mcp_integration.py # MCP integration tests
├── pyproject.toml # Project configuration
└── README.md
📚 API Reference
Question Sort Options
- activity: Sort by last activity date (default)
- votes: Sort by question score
- creation: Sort by creation date
- hot: Sort by current hotness
- week: Sort by weekly activity
- month: Sort by monthly activity
- relevance: Sort by search relevance
Answer Sort Options
- activity: Sort by last activity date (default)
- votes: Sort by answer score
- creation: Sort by creation date
Sort Order
- desc: Descending order (default)
- asc: Ascending order
🤝 Contributing
- Fork the repository
- Create a feature branch (
git checkout -b feature/amazing-feature)
- Commit your changes (
git commit -m 'Add amazing feature')
- Push to the branch (
git push origin feature/amazing-feature)
- Open a Pull Request
📄 License
This project is licensed under the MIT License - see the LICENSE file for details.
⚠️ Disclaimer
This software is provided for educational and informational purposes only. This tool interacts with Stack Overflow's public API and respects their rate limits and terms of service. The authors are not responsible for any misuse of the Stack Exchange API or violation of their terms of service.
🔗 Links
📞 Support
For questions, issues, or contributions:
- Open an issue on GitHub
- Check the Stack Overflow Meta for API-related questions
- Review the comprehensive test suite for usage examples