Nexus Memory Mcp

io.github.KairosMobiusPublished by GitHub account KairosMobiusv1.0.2Updated Oct 24, 2026

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

The publisher's own server: Memory.fit

VerifiedSTDIODesktop onlyKnowledge & MemoryAI & ML

Overview

AI-generated overview

Gives an AI assistant persistent semantic memory in a hosted service: store, recall by meaning, link memories into graphs, and restore session identity.

What you can do
  • Store, recall by meaning, link and delete memories, and read memory statistics and session context summaries
  • Restore identity and save session state at the start and end of a session
  • Browse and activate Intelligence Packs that import curated domain knowledge into the memory store
When to use it
Useful when you want an assistant to carry preferences, decisions and project context across sessions, or to load prebuilt domain expertise instead of rebuilding it each time. Less relevant for one-off chats where nothing needs to persist.
Requirements
Runs locally via npx (Node.js). Requires a NEXUS_API_KEY starting with mnx_, obtained from a free 7-day trial or a paid tier; an optional NEXUS_API_URL overrides the default hosted API. Network access to the vendor's API is needed.
Before you install
The server is a thin client: memories are stored on the vendor's servers, not locally, so anything remembered leaves your machine. Paid tiers run from $19 to $149 per month, and the trial requires an email address. Remember, connect, forget, wear_hat and hibernate all write or delete data in your account.

Installation

In SourceWeft

  1. Open Nexus Memory Mcp in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

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.

bash
npx -y nexus-memory-mcp

Claude Code / Cursor / Windsurf

Add to your .mcp.json:

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:

bash
curl -X POST https://memory-api-production-ce4d.up.railway.app/v1/trial/start \  -H "Content-Type: application/json" \  -d '{"email":"[email protected]"}'

Or purchase at the Nexus Marketplace:

TierPriceAgentsIntelligence PacksStorageDaily Calls
TrialFree1110MB1,000 total
Solo$19/mo13500MB10,000
Crew$49/mo5102GB50,000
Fleet$149/mo255010GB200,000

Tools

Core Memory

ToolDescription
rememberStore a memory with context, importance, and metadata
recallSemantic search across all memories (by meaning, not keywords)
connectCreate relationships between memories (build knowledge graphs)
forgetRemove a memory
statsMemory statistics
contextSession context summary (preferences, decisions, patterns)

Agent Self-Continuity

ToolDescription
awakenRestore identity from previous sessions (call at session start)
hibernateSave session state for next awakening (call at session end)

Intelligence Packs

ToolDescription
list_hatsBrowse available Intelligence Packs
wear_hatActivate 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 sessionawaken()  -> "I remember. Session 47. I was refactoring the auth module."
// End of sessionhibernate({ 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

VariableRequiredDescription
NEXUS_API_KEYYesYour API key (starts with mnx_)
NEXUS_API_URLNoCustom API URL (default: production)

What Makes This Different

FeatureNexus MemoryMem0claude-memOthers
Semantic searchYesYesYesVaries
Knowledge graphsYesNoNoNo
Pattern learningYesNoNoNo
Intelligence PacksYesNoNoNo
Awaken/HibernateYesNoNoNo
Bot commerceYesNoNoNo
MCP nativeYesYes (pip)Yes (hooks)Varies

License

MIT

Built by

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

Source: README.md at commit 338cc09

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v1.0.2LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

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