Memory Nexus 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 @memory-nexus/mcp
Claude Code / Cursor / Windsurf
Add to your .mcp.json:
{
"mcpServers": {
"memory-nexus": {
"command": "npx",
"args": ["-y", "@memory-nexus/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 |
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 <-> @memory-nexus/mcp <-> Memory Nexus 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 | Memory Nexus | 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
Memory Nexus - Building the intelligence marketplace for the bot economy.