Neo4j Cypher SSE

[AndroDevcd]

This PR makes changes to the cypher mcp server to add sse + stdio transport types to the neo4j-server.

Project Structure
mcp/
└── neo4j-cypher/
├── main.py # Entry point for running the server
└── src/
├── init.py # Package marker
├── app.py # FastAPI application setup
├── server.py # Core server implementation
├── transport.py # Transport layer abstraction
└── transports/
├── init.py # Package marker
├── sse_transport.py # SSE transport implementation
└── stdio_transport.py # stdio transport implementation

How to Run

With SSE Transport (Default)

bash$ python main.py --transport sse --db-url bolt://localhost:7687 --username neo4j --password password

With stdio Transport

bash$ python main.py --transport stdio --db-url bolt://localhost:7687 --username neo4j --password password

Configuration

The server can be configured using command-line arguments or environment variables:

--transport: Transport type (sse or stdio), default is sse
--db-url: Neo4j database URL
--username: Neo4j username
--password: Neo4j password
--database: Neo4j database name, default is neo4j
--port: Port for HTTP server when using SSE transport, default is 8000

Environment variables:

NEO4J_URI or NEO4J_URL: Neo4j database URL
NEO4J_USERNAME or NEO4J_USER: Neo4j username
NEO4J_PASSWORD: Neo4j password
NEO4J_DATABASE: Neo4j database name
MCP_TRANSPORT: Transport type (sse or stdio)