point-topic-mcp 0.1.37

UK broadband data analysis MCP server with Snowflake integration

Point Topic MCP Server

UK broadband data analysis server via Model Context Protocol. Simple stdio-based server for local development and Claude Desktop integration.

✅ what's implemented

core tools:

• assemble_dataset_context() - gets database schemas and examples for datasets (upc, upc_take_up, upc_forecast, ontology)
• execute_query() - runs safe read-only SQL queries against Snowflake

authentication: environment variables for Snowflake credentials

installation (for end users)

simple pip install:

pip install point-topic-mcp

add to your MCP client (Claude Desktop, Cursor, etc.):

{
  "mcpServers": {
    "point-topic": {
      "command": "point-topic-mcp",
      "env": {
        "SNOWFLAKE_USER": "your_user", 
        "SNOWFLAKE_PASSWORD": "your_password"
      }
    }
  }
}

Claude Desktop config location:

• Mac: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

development setup

setup: uv sync

for local development with claude desktop:

This will add the server to your claude desktop config.

uv run mcp install src/point_topic_mcp/server_local.py --with "snowflake-connector-python[pandas]" -f .env

for mcp inspector:

uv run mcp dev src/point_topic_mcp/server_local.py

environment configuration:

create .env file with your snowflake credentials:

# Your Snowflake credentials
SNOWFLAKE_USER=your_user
SNOWFLAKE_PASSWORD=your_password

architecture

stdio transport: communicates with MCP clients (Claude Desktop, Cursor) via standard input/output for local integration

tools: two main tools for Snowflake data analysis

• assemble_dataset_context() - provides schemas and context for available datasets
• execute_query() - executes safe read-only SQL queries

authentication: uses environment variables for Snowflake database credentials

adding new datasets

this project uses a modular dataset system that allows easy addition of new data sources. each dataset is self-contained and automatically discovered by the MCP server.

dataset structure

each dataset is a python module in src/point_topic_mcp/context/datasets/ with two required functions:

def get_dataset_summary():
    """Brief description visible to agents at all times.
    Keep concise - this goes in every agent prompt."""
    return "short description of what data is available"

def get_db_info():
    """Complete context: schema, instructions, examples.
    Only loaded when agent requests this dataset."""
    return f"""
    {DB_INFO}
    
    {DB_SCHEMA}
    
    {SQL_EXAMPLES}
    """

key principles

1. context window efficiency: keep get_dataset_summary() extremely concise - it's always visible to agents
2. lazy loading: full context via get_db_info() only loads when needed
3. self-contained: each dataset module includes all its own schema, examples, and usage notes
4. auto-discovery: new .py files in the datasets directory are automatically available

adding a new dataset

1. create the module: src/point_topic_mcp/context/datasets/your_dataset.py
2. implement required functions: get_dataset_summary() and get_db_info()
3. test locally: uv run mcp dev src/point_topic_mcp/server_local.py
4. verify discovery: agent should see your dataset in assemble_dataset_context() tool description

see existing modules (upc.py, upc_take_up.py, upc_forecast.py) for structure examples.

optimization tips

• prioritize essential info in summaries
• use clear table descriptions that help agents choose the right dataset
• include common query patterns in examples
• sanity check data against known UK facts in instructions

publishing to PyPI (for maintainers)

build and test locally:

# Build the package with UV (super fast!)
uv build

# Test installation locally
pip install dist/point_topic_mcp-*.whl

# Test the command works
point-topic-mcp

publish to PyPI:

# Set up PyPI credentials in ~/.pypirc first (one time setup)
# [pypi]
#   username = __token__
#   password = pypi-xxxxx...

# Publish to PyPI with the publish script
./publish_to_pypi.sh

test installation from PyPI:

pip install point-topic-mcp
point-topic-mcp