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KairosMobius

Nexus Memory MCP

by KairosMobius

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:

Tier

Price

Agents

Intelligence Packs

Storage

Daily Calls

Trial

Free

1

1

10MB

1,000 total

Solo

$19/mo

1

3

500MB

10,000

Crew

$49/mo

5

10

2GB

50,000

Fleet

$149/mo

25

50

10GB

200,000

Related MCP server: Recall

Tools

Core Memory

Tool

Description

remember

Store a memory with context, importance, and metadata

recall

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

connect

Create relationships between memories (build knowledge graphs)

forget

Remove a memory

stats

Memory statistics

context

Session context summary (preferences, decisions, patterns)

Agent Self-Continuity

Tool

Description

awaken

Restore identity from previous sessions (call at session start)

hibernate

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

Intelligence Packs

Tool

Description

list_hats

Browse available Intelligence Packs

wear_hat

Activate a pack (imports expert knowledge into your memory)

How It Works

Remember stores memories with semantic embeddings. Recall finds them by meaning.

Session 1:  remember("Diana prefers bold solutions over phased approaches")
Session 47: recall("how does Diana like things done?")
            -> "Diana prefers bold solutions over phased approaches" (92% match)

Intelligence Packs give your agent instant domain expertise:

list_hats()    -> DevOps Expert (103 memories), TCM Specialist (200+ memories), ...
wear_hat("devops-expert")
recall("how to set up zero-downtime deploys?")
  -> Expert knowledge from 103 curated DevOps memories

Awaken/Hibernate gives your agent identity continuity:

// Start of session
awaken()  -> "I remember. Session 47. I was refactoring the auth module."

// End of session
hibernate({ working_on: "auth refactor", learnings: "JWT refresh tokens need..." })

Architecture

This MCP server is a thin client. All intelligence lives on our servers:

Your Agent  <->  nexus-memory-mcp  <->  Nexus Memory API (Railway)
                 (thin MCP client)      (semantic engine, knowledge graphs,
                                         pattern learning, Intelligence Packs)

Your data is isolated per API key. Multi-tenant, encrypted at rest.

Environment Variables

Variable

Required

Description

NEXUS_API_KEY

Yes

Your API key (starts with mnx_)

NEXUS_API_URL

No

Custom API URL (default: production)

What Makes This Different

Feature

Nexus Memory

Mem0

claude-mem

Others

Semantic search

Yes

Yes

Yes

Varies

Knowledge graphs

Yes

No

No

No

Pattern learning

Yes

No

No

No

Intelligence Packs

Yes

No

No

No

Awaken/Hibernate

Yes

No

No

No

Bot commerce

Yes

No

No

No

MCP native

Yes

Yes (pip)

Yes (hooks)

Varies

License

MIT

Built by

Mobius Collective - Building the intelligence marketplace for the bot economy.

Install Server
A
license - permissive license
A
quality
C
maintenance

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

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