Nexus Memory MCP

Name: Nexus Memory MCP
Author: KairosMobius

by KairosMobiusversion 1.0.2i★ –iRuns on your computer

Registry nameio.github.KairosMobius/nexus-memory-mcp

Install

Overview

Description from the maker (original English)

Persistent semantic memory for AI agents with knowledge graphs and Intelligence Packs.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new↓ 49/wk · ★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Search & AI memory

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: NEXUS_API_KEY

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

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

Run this in your terminal

claude mcp add nexus-memory --env NEXUS_API_KEY=your-value -- npx -y nexus-memory-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "nexus-memory": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "nexus-memory-mcp"
      ],
      "env": {
        "NEXUS_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

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

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 9, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account KairosMobius, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Search & AI memoryi

More stars than 0% of the other 5730 servers in this category
Published to the registry more recently than 3% of the other 5730 servers in this category
Basic checks equal to or better than 100% of the other 5730 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Nexus Memory MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.2) reached the registry 9 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Context7

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

by upstashWidely used↓ 972.7K/wk★ 64.2KUpdated 2 days ago

Computer or cloud

Install

Codebase Memory

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

by DeusDataWidely used↓ 18K/wk★ 48.1KUpdated 22 days ago

Runs on your computer

Install

Exa

Connect AI agents to Exa for web search, content fetching, and multi-step research.

by exa-labsWidely used★ 5.2KUpdated 2 months ago

Runs in the cloud✓ exa.ai

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

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

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.

Nexus Memory MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Search & AI memoryi

Common questions

Alternatives

Context7

Codebase Memory

Exa

README from the maker

Nexus Memory MCP

Install

Claude Code / Cursor / Windsurf

Get an API Key

Tools

Core Memory

Agent Self-Continuity

Intelligence Packs

How It Works

Architecture

Environment Variables

What Makes This Different

License

Built by