MemoryMesh - The SQLite of AI Memory

Give any LLM persistent memory in 3 lines of Python. Zero dependencies. Fully local.

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The Problem

AI tools start every session with amnesia. Your preferences, decisions, past mistakes -- all gone. You repeat yourself. The AI re-discovers things you already told it. Context windows reset, and weeks of accumulated knowledge vanish.

MemoryMesh fixes this. Install once, and your AI remembers everything -- across sessions, across tools, across projects.

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Why MemoryMesh?

Solution	Approach	Trade-off
Mem0	SaaS / managed service	Requires cloud account, data leaves your machine, ongoing costs
Letta / MemGPT	Full agent framework	Heavy framework lock-in, complex setup, opinionated architecture
Zep	Memory server	Requires PostgreSQL, Docker, server infrastructure
MemoryMesh	Embeddable library	Zero dependencies. Just SQLite. Works anywhere.

Like SQLite revolutionized embedded databases, MemoryMesh brings the same philosophy to AI memory: simple, reliable, embeddable. No infrastructure. No lock-in. No surprises.

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MCP Quick Start

Option 1: Try instantly (no install)

Connect to the hosted MemoryMesh server -- no local installation needed:

Via Smithery:

npx -y @smithery/cli install @sparkvibe-io/memorymesh --client claude

Or browse and connect at smithery.ai/servers/sparkvibe-io/memorymesh. Supports 20+ MCP clients including Claude Code, Cursor, Windsurf, and Cline.

Option 2: Install locally (recommended for production)

Install once, then add the config to your tool of choice:

pip install memorymesh

Claude Code (~/.claude/settings.json):

{
  "mcpServers": {
    "memorymesh": {
      "command": "memorymesh-mcp"
    }
  }
}

Cursor (.cursor/mcp.json):

{
  "mcpServers": {
    "memorymesh": {
      "command": "memorymesh-mcp"
    }
  }
}

Gemini CLI (~/.gemini/settings.json):

{
  "mcpServers": {
    "memorymesh": {
      "command": "memorymesh-mcp"
    }
  }
}

Your AI now has persistent memory across sessions. Preferences, decisions, and patterns survive context window resets.

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Python Quick Start

from memorymesh import MemoryMesh

memory = MemoryMesh()
memory.remember("User prefers Python and dark mode")
results = memory.recall("What does the user prefer?")

That is it. Three lines to give your AI application persistent, semantic memory.

# Works with any LLM -- inject recalled context into your prompts
context = memory.recall("What do I know about this user?")

# Claude
response = claude_client.messages.create(
    model="claude-sonnet-4-20250514",
    system=f"User context: {context}",
    messages=[{"role": "user", "content": "Help me design an API"}],
)

# GPT
response = openai_client.chat.completions.create(
    model="gpt-4",
    messages=[
        {"role": "system", "content": f"User context: {context}"},
        {"role": "user", "content": "Help me design an API"},
    ],
)

# Or Ollama, Gemini, Mistral, Llama, or literally anything else

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How It Works

1. Store -- After each interaction, remember() the key facts, decisions, and patterns (not the full conversation).
2. Recall -- At the start of the next session, recall() retrieves only the most relevant memories ranked by semantic similarity, recency, and importance.
3. Persist -- Memories live in SQLite on your machine. They survive session restarts, tool switches, and context window resets.

The real value

• Cross-session persistence -- Decisions made Monday are still known Friday.
• Cross-tool memory -- What you teach Claude stays available in Gemini, Codex, and Cursor.
• Structured recall -- Categories, importance scoring, time decay, and semantic search instead of brute-force history replay.
• Privacy -- Everything local. No cloud, no telemetry, no data leaves your machine.

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Installation

# Base installation (no external dependencies, uses built-in keyword matching)
pip install memorymesh

# With local embeddings (sentence-transformers, runs entirely on your machine)
pip install "memorymesh[local]"

# With Ollama embeddings (connect to a local Ollama instance)
pip install "memorymesh[ollama]"

# With OpenAI embeddings
pip install "memorymesh[openai]"

# Everything
pip install "memorymesh[all]"

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Features

• Simple API -- remember(), recall(), forget(). That is the core interface. No boilerplate, no configuration ceremony.
• SQLite-Based -- All memory stored in SQLite files. No database servers, no infrastructure. Automatic schema migrations.
• Framework-Agnostic -- Works with any LLM, any framework, any architecture. Use it with LangChain, LlamaIndex, raw API calls, or your own setup.
• Pluggable Embeddings -- Choose from local models, Ollama, OpenAI, or plain keyword matching with zero dependencies.
• MCP Support -- Built-in MCP server for seamless integration with Claude Code, Cursor, Gemini CLI, and other MCP-compatible tools.
• Memory Categories -- Automatic categorization with scope routing. Preferences go global; decisions stay in the project. MemoryMesh decides where memories belong.
• Encrypted Storage -- Optionally encrypt memory text and metadata at rest with zero external dependencies.
• Privacy-First -- All data stays on your machine. No telemetry, no cloud calls, no data collection. You own your data.
• Auto-Compaction -- Transparent deduplication that runs automatically during normal use. Like SQLite's auto-vacuum, you never need to think about it.
• Cross-Platform -- Runs on Linux, macOS, and Windows. Anywhere Python runs, MemoryMesh runs.

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What's New

v4.3 -- Performance (Latest)

• Bulk Access Updates -- recall() batches N access-time updates into 1-2 SQL calls instead of N.
• Light Listing -- session_start and smart_sync skip loading embedding blobs, reducing I/O.
• Recency Fix -- update_access() no longer sets updated_at, fixing a recency feedback loop.

v4.1 -- Hardening

• Contradiction Scan -- 10K→500 candidate limit for contradiction detection (biggest perf win).
• Security -- CORS same-origin, 1MB body limit, SSRF blocklist expansion, MCP assert→if/raise.
• Correctness -- Atomic scope migration (save-first-then-delete), on_conflict validation.
• Infra -- PRAGMA busy_timeout=5000, PEP 561 py.typed, expanded secret regex patterns.

v4.0 -- Invisible Memory

• Smart Sync -- Export the top-N most relevant memories to .md files, ranked by importance and recency.
• Configurable Relevance Weights -- Tune recency, importance, and similarity weights via environment variables or constructor parameters.
• EncryptedStore Completeness -- EncryptedMemoryStore now supports search_filtered and update_fields, matching the full MemoryStore interface.
• Security Hardening -- SQL injection fix in search_filtered (strict allowlist for metadata keys) and explicit file permissions on database files.

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Roadmap

v4.3.0 is the latest release. Available on PyPI.

v5.0 -- Performance & Scale is next. sqlite-vec ANN indexing, FTS5 keyword search, batch operations, and NumPy-accelerated cosine similarity for 5K+ memory stores.

See the full roadmap for details, strategic context, and completed milestones.

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Documentation

Full documentation: sparkvibe-io.github.io/memorymesh

Guide	Description
Configuration	Embedding providers, Ollama setup, all constructor options
MCP Server	Setup for Claude Code, Cursor, Windsurf + teaching your AI to use memory
Multi-Tool Sync	Sync memories across Claude, Codex, and Gemini CLI
CLI Reference	Terminal commands for inspecting and managing memories
API Reference	Full Python API with all methods and parameters
Architecture	System design, dual-store pattern, and schema migrations
FAQ	Common questions answered
Benchmarks	Performance numbers and how to run benchmarks

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Available On

Platform	Link
PyPI	pypi.org/project/memorymesh
Smithery	smithery.ai/servers/sparkvibe-io/memorymesh
GitHub	github.com/sparkvibe-io/memorymesh

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Contributing

We welcome contributions from everyone. See CONTRIBUTING.md for guidelines on how to get started.

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License

MIT License. See LICENSE for the full text.

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Free. Forever. For Everyone.

MemoryMesh is part of the SparkVibe open-source AI initiative. We believe that foundational AI tools should be free, open, and accessible to everyone -- not locked behind paywalls, cloud subscriptions, or proprietary platforms.

Our mission is to reduce the cost and complexity of building AI applications, so that developers everywhere -- whether at a startup, a research lab, a nonprofit, or learning on their own -- can build intelligent systems without barriers.

If AI is going to shape the future, the tools that power it should belong to all of us.