Persistent memory for AI agents.
Connect Claude, Codex, and Gemini to one shared knowledge base. Fixes, decisions, and context survive every session.
npx knowledge-base-serverEvery session starts from zero.
You paste the same context into every chat.
Switch tools? Start explaining all over again.
Fixes from yesterday? Your AI has no idea.
Three commands. Permanent memory.
Connect
Add memstalker to your MCP config. One command.
// claude_desktop_config.json
{
"mcpServers": {
"memstalker": {
"command": "npx",
"args": ["knowledge-base-server", "mcp"]
}
}
}Capture
Your AI saves what it learns — fixes, decisions, context.
> kb_capture_fix "Docker networking" ✓ Fix captured: bridge network DNS resolution > kb_capture_session ✓ Session saved: 3 findings, 2 fixes, 1 decision
Retrieve
Context comes back instantly. Every session starts smarter.
> kb_search "docker networking fix" → 8ms · 3 results 1. Fix: bridge network DNS resolution 2. Session: Docker compose networking debug 3. Lesson: always use custom networks
See it in action.
2-minute demo
How Memstalker compares.
| Feature | Memstalker | Mem0 | Zep | Letta |
|---|---|---|---|---|
| Cross-model memory | ✓ | ✗ | ✗ | ✗ |
| Free hosted tier | ✓ | ✗ | ✓ | ✗ |
| Self-hosted option | ✓ | Enterprise | ✗ | ✗ |
| Setup time | < 5 min | API integration | API integration | Platform onboard |
| Self-learning | ✓ | ✗ | ✗ | ✓ |
| Data ownership | Full | Cloud | Cloud | Cloud |
| Starting price | Free | $249/mo | Metered | $20/mo |
Your data. Not ours.
We can't read your data. Period. Encrypted at rest and in transit.
Self-host if you want zero trust. Your server, your rules.
When you leave, we destroy your data. You get a download window first.
We don't train on your data. We don't sell it. No third-party access.
Start free. Scale when you need to.
Free
Try it. No credit card.
- ✓Managed hosting
- ✓100 docs
- ✓1K searches/mo
- ✓1 AI connector
- ✓FTS5
- ✓Self-learning
- ✓Community support
Pro
Locked in forever. 500 spots.
- ✓Everything in Free
- ✓Unlimited docs
- ✓Unlimited searches
- ✓All AI connectors
- ✓FTS5+Semantic
- ✓YouTube/GitHub/Twitter ingestion
- ✓API access
- ✓Email support
Team
Shared memory for your team.
- ✓Everything in Pro
- ✓Up to 5 members
- ✓Shared KB
- ✓Role-based access
- ✓Team analytics
- ✓Priority support
Self-Hosted
Full features. Your infrastructure.
- ✓Unlimited everything
- ✓All AI connectors
- ✓FTS5+Semantic
- ✓Self-learning
- ✓Full API
- ✓Community support
Frequently asked questions.
Yes. Encrypted at rest and in transit. We cannot access your data. When you cancel, we destroy it — you get a download window first.
Yes, forever. The open source version is fully featured. Self-host on any VPS or your own machine.
Claude, Codex, Gemini, and any MCP-compatible client. Connect via MCP protocol or REST API.
Memstalker is writeable. Your AI doesn't just read — it updates its own memory with fixes, decisions, and lessons learned.
That's one model, one platform. Memstalker works across all models and persists context that built-in memory doesn't capture.
Under 5 minutes. One npx command to start the server, one config entry to connect your AI tool.
Yes. The Team plan supports up to 5 members sharing one knowledge base with role-based access.
Give your AI agents a real memory.
No credit card required. Free tier available.