Claude Code

Claude Code supports MCP servers, letting it access MemNexus memory during coding sessions. This means Claude Code can remember your project context, coding preferences, and past debugging sessions.

Prerequisites

• Claude Code installed
• A MemNexus API key (request access)
• Node.js 18+ installed

Setup

1. Add the MCP server

Add MemNexus to .mcp.json in your project root (this file is shareable with your team):

{
  "mcpServers": {
    "memnexus": {
      "type": "stdio",
      "command": "npx",
      "args": ["@memnexus-ai/mcp-server"],
      "env": {
        "MEMNEXUS_API_KEY": "cmk_live_xxx.yyy"
      }
    }
  }
}

Replace cmk_live_xxx.yyy with your actual API key.

For personal (non-shared) setup, you can also run claude mcp add memnexus and follow the prompts.

2. Verify

Start a Claude Code session and ask Claude to call initialize_session. It should return a working memory brief with your recent activity. If this is your first session, it will return a fresh start message — that is expected.

What Claude Code remembers

With MemNexus, Claude Code can recall:

• Project structure — Tech stack, architecture, conventions
• Coding patterns — Error handling, API patterns, component structure
• Past decisions — Why you chose a particular approach
• Bug fixes — Root causes and solutions from past debugging
• Preferences — Formatting, libraries, naming conventions

Usage patterns

Automatic context loading

Add to your project's CLAUDE.md file:

Working memory is automatically loaded at session start — you do not need
to call initialize_session manually. Call it only when switching tasks
mid-session or when you want a fresher context briefing.

Saving debugging sessions

When you fix a tricky bug, Claude Code can save the resolution:

"Save a memory about this fix — the CORS issue was caused by the API gateway stripping the credentials header"

Building project knowledge

Over time, Claude Code builds a knowledge base about your project:

Session 1: Learns project structure and tech stack
Session 2: Learns error handling patterns
Session 3: Learns deployment process
Session 4: Applies all accumulated knowledge

Tips

• Use with CLAUDE.md — Combine MemNexus memory with project-level CLAUDE.md for both persistent and per-project context
• Save before switching — When switching between projects, save your current context
• Topic by project — Use project names as topics to keep memories organized

Troubleshooting

If tools aren't working:

1. Check that the MCP server configuration is valid JSON
2. Ensure npx is in your PATH
3. Verify your API key is valid — keys use the format cmk_live_<id>.<secret> (find yours at memnexus.ai)
4. Restart Claude Code

Next steps

• Cursor — Set up memory in Cursor
• Agent Patterns — Design patterns for coding assistants
• MCP Integration — Full tool reference