Nexus Memory Mcp
Give Claude Code or Cursor a persistent semantic memory layer so long-running agent sessions remember facts, relationships, and packaged domain knowledge across chats.
Overview
Nexus Memory MCP is a MCP server for the Build phase that gives AI agents persistent semantic memory, knowledge graphs, and Intelligence Packs via Memory Nexus.
What is this MCP server?
- Persistent semantic memory across agent sessions
- Knowledge-graph style linking of entities and facts
- Intelligence Packs for bundled domain memory
- stdio MCP transport via npm package nexus-memory-mcp
- NEXUS_API_KEY from Memory Nexus or /v1/trial/start
- MCP server version 1.0.2
- stdio transport via npm identifier nexus-memory-mcp
- Requires NEXUS_API_KEY environment variable
What problem does it solve?
Agent chats reset every session, so builders cannot ship assistants that reliably remember users, decisions, or structured facts without a dedicated memory service.
Who is it for?
Indie builders adding long-term memory to Claude Code or Cursor agents without building embeddings and graph storage themselves.
Skip if: Teams that only need ephemeral in-thread context or cannot send conversation-derived data to an external Memory Nexus API.
What do I get? / Deliverables
After you register the server and set NEXUS_API_KEY, your agent can store and retrieve semantic memory and graph-linked knowledge across conversations.
- Registered stdio MCP server in agent config
- Cross-session semantic recall for agent workflows
- Optional Intelligence Pack-backed domain memory
Recommended MCP Servers
Journey fit
Memory MCP servers are cataloged under Build because they extend the agent runtime; they remain useful whenever the product ships an AI assistant. Agent-tooling is the canonical shelf for MCP servers that add cognition and recall rather than a single third-party API.
How it compares
External memory MCP integration, not a local markdown notes skill.
Common Questions / FAQ
Who is Nexus Memory MCP for?
Solo and small-team builders shipping AI agents who need durable semantic memory and optional Intelligence Packs beyond the model context window.
When should I use Nexus Memory MCP?
Use it when your agent must recall user facts, project history, or packaged knowledge graphs across sessions during Build and Operate.
How do I add Nexus Memory MCP to my agent?
Install the npm MCP package nexus-memory-mcp, set NEXUS_API_KEY from Memory Nexus or the trial start endpoint, and wire stdio transport in Claude Code, Cursor, or Codex MCP config.