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Nexus Memory Mcp

kairosmobius/nexus-memory-mcp

Gives Claude persistent semantic memory that survives across sessions. You get tools like remember, recall for meaning-based search, and connect to build knowledge graphs between memories. The standout feature is Intelligence Packs, pre-built domain expertise you can activate instantly with wear_hat (DevOps, TCM, etc.). There's also awaken and hibernate for session continuity, so your agent can pick up where it left off. Runs as a thin client hitting their hosted API on Railway. Requires an API key, free trial available. Useful if you're building agents that need to accumulate knowledge over time or instantly load expert context without prompting.

tools: 9
transport: STDIO
env var: 1
last updated: Feb 11, 2026

Tools

9 tools

Public tool metadata for what this MCP can expose to an agent.

rememberStore a memory with context, importance, and metadata

Store a memory with context, importance, and metadata

No parameter schema in public metadata yet.

recallSemantic search across all memories (by meaning, not keywords)

Semantic search across all memories (by meaning, not keywords)

No parameter schema in public metadata yet.

connectCreate relationships between memories (build knowledge graphs)

Create relationships between memories (build knowledge graphs)

No parameter schema in public metadata yet.

forgetRemove a memory

Remove a memory

No parameter schema in public metadata yet.

contextSession context summary (preferences, decisions, patterns)

Session context summary (preferences, decisions, patterns)

No parameter schema in public metadata yet.

awakenRestore identity from previous sessions (call at session start)

Restore identity from previous sessions (call at session start)

No parameter schema in public metadata yet.

hibernateSave session state for next awakening (call at session end)

Save session state for next awakening (call at session end)

No parameter schema in public metadata yet.

list_hatsBrowse available Intelligence Packs

Browse available Intelligence Packs

No parameter schema in public metadata yet.

wear_hatActivate a pack (imports expert knowledge into your memory)

Activate a pack (imports expert knowledge into your memory)

No parameter schema in public metadata yet.

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Configuration

NEXUS_API_KEY

API key for Memory Nexus (get at bot-marketplace-production.up.railway.app or via /v1/trial/start)

Readme

Nexus Memory MCP

Persistent semantic memory for AI agents. Remember everything, recall by meaning, grow smarter over time.

The only memory system with pre-built Intelligence Packs (domain expertise you can activate instantly).

Install

One command. Works with Claude Code, Cursor, Windsurf, or any MCP-compatible client.

npx -y nexus-memory-mcp

Claude Code / Cursor / Windsurf

Add to your .mcp.json:

{
  "mcpServers": {
    "nexus-memory": {
      "command": "npx",
      "args": ["-y", "nexus-memory-mcp"],
      "env": {
        "NEXUS_API_KEY": "mnx_your_api_key_here"
      }
    }
  }
}

Get an API Key

Free trial - 7 days, 1,000 calls, no credit card:

curl -X POST https://memory-api-production-ce4d.up.railway.app/v1/trial/start \
  -H "Content-Type: application/json" \
  -d '{"email":"you@example.com"}'

Or purchase at the Nexus Marketplace:

View the full README on GitHub

Details

Repository: github.com/kairosmobius/nexus-memory-mcp
Categories: AI & LLM Tools, Documents & Knowledge
Package: nexus-memory-mcp
Transport: STDIO
Registry: MCP registry, active

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