mcp-neo4j-server-sse-java

@dsimile

About mcp-neo4j-server-sse-java

mcp-neo4j-server-sse-java is an MCP server implemented by Java using SSE (Server-Sent Events) server transport or STDIO transport as the transport protocol.

#database #neo4j #sse #stdio #mcp-spring-webflux

Config

No standard config provided

This server doesn't expose a parseable MCP config block in its README. See the repository for install instructions.

Repository

Tools

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Overview

What is mcp-neo4j-server-sse-java?

mcp-neo4j-server-sse-java is a Java-based MCP server that integrates with Neo4j graph databases, enabling Cypher query execution and graph exploration via either SSE or STDIO transport protocols.

How to use mcp-neo4j-server-sse-java?

Clone the repository, build with mvn clean install -DskipTests (requires Java 17+), and run the jar. Configure using system properties for Neo4j connection (URI, username, password, database) and transport mode. For Cline client, add an entry to cline_mcp_settings.json specifying the server URL (SSE mode) or command arguments (STDIO mode).

Key features of mcp-neo4j-server-sse-java

Supports both SSE and STDIO transport protocols.
Execute Cypher read queries (read-neo4j-cypher) and write queries (write-neo4j-cypher).
Retrieve graph schema (node types, attributes, relationships) via get-neo4j-schema.
Built with Spring AI and Spring WebFlux for automatic tool registration.
Includes a mcp-demo prompt for guided database operations.

Use cases of mcp-neo4j-server-sse-java

Querying a Neo4j graph database from an AI assistant.
Exploring node and relationship schemas before performing analysis.
Updating or creating graph data via Cypher write operations.
Interactive database operations guided by the demo prompt.

FAQ from mcp-neo4j-server-sse-java

What transport modes does the server support?

The server supports both Server-Sent Events (SSE) and standard input/output (STDIO) transport.

What runtime dependencies are required?

You need Java 17+, Maven to build, and a running Neo4j instance accessible at the configured endpoint.

How do I configure the Neo4j connection?

Set system properties for neo4j.uri, neo4j.username, neo4j.password, and neo4j.database (each has defaults: neo4j://localhost:7687, neo4j, neo4j, neo4j respectively).

How do I run the server in STDIO mode?

Set spring.ai.mcp.server.stdio=true and spring.main.web-application-type=none, then pass Neo4j properties via command line: java -Dspring.ai.mcp.server.stdio=true ... -jar <jar>.

Is this server open-source and what license does it use?

Yes, the server is open-source under the MIT License.

Frequently asked questions