Knowledge Graph Memory Server

MCPOpen SourceMIT31.2

by edobez • Data & Databases

A local MCP server that provides persistent memory using a file-backed knowledge graph to store entities, observations, and relations for conversational agents.

Example Use Cases

1
Persistently store user profiles, preferences, and short facts across conversations using a local JSON-backed knowledge graph.
2
Search and retrieve contextual memories by querying entity names, types, or observation text to inform responses.
3
Model and traverse relationships between entities (people, organizations, events) to maintain context and connections across sessions.

Description

This server implements a persistent, local knowledge-graph-based memory store (entities, relations, observations) for use with MCP-compatible agents. It supports creating, reading, searching, and deleting entities, relations, and observations, with a JSON file backend and simple API tools. The project is a Python port of the original reference MCP memory server and is distributed under the MIT License, making it easy to self-host and integrate for chat personalization and stateful agents.

Capabilities(9 total)

Tools (9)

create_entities

Create multiple new entities in the knowledge graph. Args: entities: List of entities to create, each with name, type and observations Returns: List of newly created entities (excluding any that already existed)

entities:array*

create_relations

Create new relations between entities in the knowledge graph. Args: relations: List of relations to create, each with from_, to and relationType Returns: List of newly created relations (excluding any duplicates)

relations:array*

add_observations

Add new observations to existing entities. Args: observations: List of observations to add, each with entityName and contents Returns: List of results showing which observations were added to which entities

observations:array*

delete_entities

Delete entities and their associated relations from the graph. Args: entity_names: List of entity names to delete

entity_names:array*

delete_observations

Delete specific observations from entities. Args: deletions: List of deletions, each with entityName and observations to remove

deletions:array*

Quick Actions

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Security

Scanned 3 month(s) ago

Risk Level

MINIMAL

Read-only data retrieval, no side effects

Trust Score

C61/100

9/17 checks passed

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Quick Stats

Service TypeMCP

Pricing ModelFree

Capabilities9 Tools / 0 Prompts / 0 Resources

Owneredobez

CategoryData & Databases

DependenciesStandalone

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