MCP Neo4j Cypher

MCP Neo4j Cypher runs locally from a Python package published to PyPI: mcp-neo4j-cypher version 0.5.1. It speaks MCP over stdio, so the client starts it as a program and talks to it through standard input and output. It needs Python; clients usually start it with uvx (from uv) or after pip install — the usual command is uvx mcp-neo4j-cypher. It reads these environment variables: NEO4J_URI (required), NEO4J_USERNAME (required), NEO4J_PASSWORD (required, secret), NEO4J_DATABASE, NEO4J_NAMESPACE, NEO4J_RESPONSE_TOKEN_LIMIT, NEO4J_READ_TIMEOUT, NEO4J_READ_ONLY and NEO4J_SCHEMA_SAMPLE_SIZE; set them in the client's configuration for this server.

In the mcpServers JSON format that many desktop and editor MCP clients read, the entry looks like this (placeholders in angle brackets):

{
  "mcpServers": {
    "mcp-neo4j-cypher": {
      "command": "uvx",
      "args": [
        "mcp-neo4j-cypher"
      ],
      "env": {
        "NEO4J_URI": "<value>",
        "NEO4J_USERNAME": "<value>",
        "NEO4J_PASSWORD": "<secret>",
        "NEO4J_DATABASE": "<value>",
        "NEO4J_NAMESPACE": "<value>",
        "NEO4J_RESPONSE_TOKEN_LIMIT": "<value>",
        "NEO4J_READ_TIMEOUT": "<value>",
        "NEO4J_READ_ONLY": "<value>",
        "NEO4J_SCHEMA_SAMPLE_SIZE": "<value>"
      }
    }
  }
}

Derived from the registry entry, not tested here. What the server does, and on what terms, is set by its publisher; check its repository or website before giving it access to your accounts or files. How to add an MCP server to an assistant · Before you connect