PGMCP - PostgreSQL Model Context Protocol Server

One-Minute Overview#

PGMCP is a tool that connects AI assistants to any PostgreSQL database through natural language queries. It doesn't require schema modifications and provides read-only access to ensure data security. Whether your database is for e-commerce, analytics, or CRM, PGMCP makes it accessible to AI assistants.

Core Value: Enables any PostgreSQL database to interact with AI assistants through natural language while maintaining secure read-only access.

Quick Start#

Installation Difficulty: Low - Pre-compiled binaries available, just download and run

# Set up environment variables
export DATABASE_URL="postgres://user:password@localhost:5432/your-existing-db"
export OPENAI_API_KEY="your-api-key"  # Optional

# Run server (using pre-compiled binary)
./pgmcp-server

# Test with client in another terminal
./pgmcp-client -ask "What tables do I have?" -format table
./pgmcp-client -ask "Who is the customer that has placed the most orders?" -format table

Is this suitable for me?

• ✅ Database Querying: Need to query PostgreSQL databases through natural language with AI assistants
• ✅ Data Analysis: Want AI assistants to analyze your business data and provide insights
• ✅ E-commerce: Perform intelligent queries on product catalogs, orders, and customer data
• ❌ Write Operations: PGMCP only supports read-only queries, cannot modify data
• ❌ Non-PostgreSQL Databases: Only supports PostgreSQL databases, not other database types

Core Capabilities#

1. Natural Language to SQL - Eliminate Technical Barriers#

• Transforms natural language questions into accurate SQL queries without writing SQL User Value: Enables non-technical users to query databases through AI assistants, improving data accessibility

2. Automatic Streaming - Handle Large Datasets#

• Automatically processes large result sets with pagination and memory management User Value: Efficiently handles large query results without failures due to oversized datasets

3. Read-Only Secure Access - Data Safety Guarantee#

• Strictly enforces read-only policy, blocking all write operations User Value: 100% secure database protection against accidental data modification or deletion

4. Intelligent Text Search - Full-Text Retrieval#

• Performs free-text search across all text columns User Value: Easily find specific information like customer names, product descriptions, etc.

5. Multiple Output Formats - Flexible Data Presentation#

• Supports table, JSON, and CSV output formats User Value: Choose the most suitable data presentation for different needs, facilitating further processing or display

Technical Stack & Integration#

Development Language: Go Main Dependencies: PostgreSQL database, OpenAI API (optional for AI-powered SQL generation) Integration Method: API / MCP Protocol

Maintenance Status#

• Development Activity: Actively developed with CI/CD pipeline and Go code quality checks
• Recent Updates: Recent updates with comprehensive features and documentation
• Community Response: Clear examples and integration guides indicating an active development community

Commercial & Licensing#

License: Apache 2.0

• ✅ Commercial Use: Allowed
• ✅ Modification: Allowed
• ⚠️ Restrictions: Must include license and copyright notices

Documentation & Learning Resources#

• Documentation Quality: Comprehensive
• Official Documentation: README contains detailed usage guides and examples
• Example Code: Includes sample database schemas and basic usage examples