ai-memory

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                universal AI memory                   |___/

ai-memory is a persistent memory system for AI assistants. It works with any AI that supports MCP -- Claude, ChatGPT, Grok, Llama, and more. It stores what your AI learns in a local SQLite database, ranks memories by relevance when recalling, and auto-promotes important knowledge to permanent storage. Install it once, and every AI assistant you use remembers your architecture, your preferences, your corrections -- forever.

Zero token cost until recall. Unlike built-in memory systems (Claude Code auto-memory, ChatGPT memory) that load your entire memory into every conversation -- burning tokens and money on every message -- ai-memory uses zero context tokens until the AI explicitly calls memory_recall. Only relevant memories come back, ranked by a 6-factor scoring algorithm. TOON format (Token-Oriented Object Notation) cuts response tokens by another 40-60% by eliminating repeated field names -- 3 memories in JSON = 1,600 bytes; in TOON = 626 bytes (61% smaller); in TOON compact = 336 bytes (79% smaller). For Claude Code users: disable auto-memory ("autoMemoryEnabled": false in settings.json) and replace it with ai-memory to stop paying for 200+ lines of memory context on every single message.

Compatible AI Platforms

ai-memory integrates with any AI platform that supports the Model Context Protocol (MCP). MCP is the universal standard for connecting AI assistants to external tools and data sources.

MCP is the primary integration layer. For AI platforms that do not yet support MCP natively, the HTTP API (20 endpoints on localhost) and the CLI (25 commands) provide universal access -- any AI, script, or automation that can make HTTP calls or run shell commands can use ai-memory.

Install in 60 Seconds

Pre-built binaries require no dependencies. Building from source needs Rust and a C compiler.

Fastest: Pre-built binary (no Rust required)

# macOS / Linux
curl -fsSL https://raw.githubusercontent.com/alphaonedev/ai-memory-mcp/main/install.sh | sh

# Ubuntu (PPA)
sudo add-apt-repository ppa:jbridger2021/ai-memory && sudo apt install ai-memory

# Fedora/RHEL (COPR)
sudo dnf copr enable alpha-one-ai/ai-memory && sudo dnf install ai-memory

# Windows (PowerShell)
irm https://raw.githubusercontent.com/alphaonedev/ai-memory-mcp/main/install.ps1 | iex

Step 1: Install Rust (skip if using pre-built binaries)

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Follow the prompts, then restart your terminal (or run source ~/.cargo/env).

Step 2: From source (requires Rust)

Latest release from Crates.io:

cargo install ai-memory

Latest from the git repository:

cargo install --git https://github.com/alphaonedev/ai-memory-mcp.git

This compiles the binary and puts it in your PATH. It takes a minute or two.

Build dependencies for source builds:

• Ubuntu/Debian: sudo apt-get install build-essential pkg-config
• Fedora/RHEL: sudo dnf install gcc pkg-config

Step 3: Connect your AI

Configuration varies by platform. Find yours below:

{
  "mcpServers": {
    "memory": {
      "command": "ai-memory",
      "args": ["--db", "~/.claude/ai-memory.db", "mcp", "--tier", "semantic"]
    }
  }
}

{
  "mcpServers": {
    "memory": {
      "command": "ai-memory",
      "args": ["--db", "~/.claude/ai-memory.db", "mcp", "--tier", "semantic"]
    }
  }
}

[mcp_servers.memory]
command = "ai-memory"
args = ["--db", "~/.local/share/ai-memory/memories.db", "mcp", "--tier", "semantic"]
enabled = true

{
  "mcpServers": {
    "memory": {
      "command": "ai-memory",
      "args": ["--db", "~/.local/share/ai-memory/memories.db", "mcp", "--tier", "semantic"],
      "timeout": 30000
    }
  }
}

{
  "mcpServers": {
    "memory": {
      "command": "ai-memory",
      "args": ["--db", "~/.local/share/ai-memory/memories.db", "mcp", "--tier", "semantic"]
    }
  }
}

{
  "mcpServers": {
    "memory": {
      "command": "ai-memory",
      "args": ["--db", "~/.local/share/ai-memory/memories.db", "mcp", "--tier", "semantic"]
    }
  }
}

mcpServers:
  - name: memory
    command: ai-memory
    args:
      - "--db"
      - "~/.local/share/ai-memory/memories.db"
      - "mcp"
      - "--tier"
      - "semantic"

{
  "mcp": {
    "servers": [
      {
        "id": "ai-memory",
        "label": "AI Memory",
        "enabled": true,
        "transport": "stdio",
        "command": "ai-memory",
        "args": ["mcp", "--tier", "semantic"]
      }
    ]
  }
}

ai-memory serve --host 127.0.0.1 --port 9077
# Expose via HTTPS reverse proxy (nginx, caddy, cloudflare tunnel, etc.)

curl https://api.x.ai/v1/responses \
  -H "Authorization: Bearer $XAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-3",
    "tools": [{
      "type": "mcp",
      "server_url": "https://your-server.example.com/mcp",
      "server_label": "memory",
      "server_description": "Persistent AI memory with recall and search",
      "allowed_tools": ["memory_store", "memory_recall", "memory_search"]
    }],
    "input": "What do you remember about our project?"
  }'

ai-memory serve --host 127.0.0.1 --port 9077

client.toolgroups.register(
    provider_id="model-context-protocol",
    toolgroup_id="mcp::memory",
    mcp_endpoint={"uri": "http://localhost:9077/sse"}
)

tool_groups:
  - toolgroup_id: mcp::memory
    provider_id: model-context-protocol
    mcp_endpoint:
      uri: "http://localhost:9077/sse"

openclaw mcp set memory '{"command":"ai-memory","args":["--db","~/.local/share/ai-memory/memories.db","mcp","--tier","semantic"]}'

{
  "mcp": {
    "servers": {
      "memory": {
        "command": "ai-memory",
        "args": ["--db", "~/.local/share/ai-memory/memories.db", "mcp", "--tier", "semantic"]
      }
    }
  }
}

command: ai-memory
args: ["--db", "/path/to/ai-memory.db", "mcp"]

ai-memory serve
# 20 endpoints at http://127.0.0.1:9077/api/v1/

Step 4: Done. Test it.

Restart your AI assistant. If using MCP, it now has 17 memory tools. Ask it: "Store a memory that my favorite language is Rust." Then in a new conversation, ask: "What is my favorite language?" It will remember.

What Does It Do?

AI assistants forget everything between conversations. ai-memory fixes that.

It runs as an MCP (Model Context Protocol) tool server -- a background process that your AI talks to natively. When your AI learns something important, it stores it. When it needs context, it recalls relevant memories ranked by a 6-factor scoring algorithm. Memories live in three tiers:

• Short-term (6 hours) -- throwaway context like current debugging state
• Mid-term (7 days) -- working knowledge like sprint goals and recent decisions
• Long-term (permanent) -- architecture, user preferences, hard-won lessons

Memories that keep getting accessed automatically promote from mid to long-term. Each recall extends the TTL. Priority increases with usage. The system is self-curating.

Beyond MCP, ai-memory also exposes a full HTTP REST API (20 endpoints on port 9077) and a complete CLI (25 commands) for direct interaction, scripting, and integration with any AI platform or tool.

Features

Core

• MCP tool server -- 17 tools over stdio JSON-RPC, compatible with any MCP client
• Three-tier memory -- short (6h TTL), mid (7d TTL), long (permanent)
• Full-text search -- SQLite FTS5 with ranked retrieval
• Hybrid recall -- FTS5 keyword + cosine similarity with fixed 0.6 semantic / 0.4 keyword (60/40) blend weights
• 6-factor recall scoring -- FTS relevance + priority + access frequency + confidence + tier boost + recency decay
• Auto-promotion -- memories accessed 5+ times promote from mid to long
• TTL extension -- each recall extends expiry (short +1h, mid +1d)
• Priority reinforcement -- +1 every 10 accesses (max 10)
• Contradiction detection -- warns when storing memories that conflict with existing ones
• Deduplication -- upsert on title+namespace, tier never downgrades
• Confidence scoring -- 0.0-1.0 certainty factored into ranking

Organization

• Namespaces -- isolate memories per project (auto-detected from git remote)
• Memory linking -- typed relations: related_to, supersedes, contradicts, derived_from
• Consolidation -- merge multiple memories into a single long-term summary
• Auto-consolidation -- group by namespace+tag, auto-merge groups above threshold
• Contradiction resolution -- mark one memory as superseding another, demote the loser
• Forget by pattern -- bulk delete by namespace + FTS pattern + tier
• Source tracking -- tracks origin: user, claude, hook, api, cli, import, consolidation, system
• Tagging -- comma-separated tags with filter support

Interfaces

• 20 HTTP endpoints -- full REST API on 127.0.0.1:9077 (works with any AI or tool)
• 25 CLI commands -- complete CLI with identical capabilities
• 17 MCP tools -- native integration for any MCP-compatible AI
• Interactive REPL shell -- recall, search, list, get, stats, namespaces, delete with color output
• JSON output -- --json flag on all CLI commands

Operations

• Multi-node sync -- pull, push, or bidirectional merge between database files
• Import/Export -- full JSON roundtrip preserving memory links
• Garbage collection -- automatic background expiry every 30 minutes
• Graceful shutdown -- SIGTERM/SIGINT checkpoints WAL for clean exit
• Deep health check -- verifies DB accessibility and FTS5 integrity
• Shell completions -- bash, zsh, fish
• Man page -- ai-memory man generates roff to stdout
• Time filters -- --since/--until on list and search
• Human-readable ages -- "2h ago", "3d ago" in CLI output
• Color CLI output -- ANSI tier labels (red/yellow/green), priority bars, bold titles, cyan namespaces

Quality

• 161 tests -- 118 unit tests across all 15 modules (db 29, mcp 12, config 9, main 9, mine 9, validate 8, reranker 7, color 6, errors 6, models 6, toon 6, embeddings 5, hnsw 4, llm 2) + 43 integration tests. 15/15 modules have unit tests — 95%+ coverage.
• LongMemEval benchmark -- 97.8% R@5 (489/500), 99.0% R@10, 99.8% R@20 on ICLR 2025 LongMemEval-S dataset. 499/500 at R@20. Pure FTS5 keyword achieves 97.0% R@5 in 2.2 seconds (232 q/s). LLM query expansion pushes to 97.8% R@5. Zero cloud API costs. See benchmark details.
• MCP Prompts -- recall-first and memory-workflow prompts teach AI clients to use memory proactively
• TOON-default -- recall/list/search responses use TOON compact by default (79% smaller than JSON)
• Criterion benchmarks -- insert, recall, search at 1K scale
• GitHub Actions CI/CD -- fmt, clippy, test, build on Ubuntu + macOS, release on tag

ML and LLM Dependencies (semantic tier+)

• candle-core, candle-nn, candle-transformers -- Hugging Face Candle ML framework for native Rust inference
• hf-hub -- download models from Hugging Face Hub
• tokenizers -- Hugging Face tokenizers for text preprocessing
• instant-distance -- approximate nearest neighbor search
• reqwest -- HTTP client for Ollama API communication (smart/autonomous tiers)

Architecture

Benchmark

Evaluated on the ICLR 2025 LongMemEval-S dataset (500 questions, 6 categories). Pure FTS5 keyword tier achieves 97.0% R@5 in 2.2 seconds. LLM query expansion (smart tier) pushes to 97.8% R@5. All inference runs locally — zero cloud API calls, zero cost.

Integration Methods

MCP (Primary -- for MCP-compatible AI platforms)

MCP is the recommended integration. Your AI gets 17 native memory tools with zero glue code. Configure the MCP server in your AI platform's config:

{
  "mcpServers": {
    "memory": {
      "command": "ai-memory",
      "args": ["--db", "~/.claude/ai-memory.db", "mcp"]
    }
  }
}

HTTP API (Universal -- for any AI or tool)

Start the HTTP server for REST API access. Any AI, script, or automation that can make HTTP calls can use this:

ai-memory serve
# 20 endpoints at http://127.0.0.1:9077/api/v1/

CLI (Universal -- for scripting and direct use)

The CLI works standalone or as a building block for AI integrations that run shell commands:

ai-memory store --tier long --title "Architecture decision" --content "We use PostgreSQL"
ai-memory recall "database choice"
ai-memory search "PostgreSQL"

Feature Tiers

ai-memory supports 4 feature tiers, selected at startup with ai-memory mcp --tier <tier>. Higher tiers add ML capabilities at the cost of disk and RAM:

Capability Matrix

Every capability mapped to its minimum tier. Each tier includes all capabilities from the tiers below it.

Semantic tier (default) bundles the Candle ML framework and downloads the all-MiniLM-L6-v2 model on first run (~90 MB). Smart and autonomous tiers require Ollama running locally.

Tiers gate features, not models. The --tier flag controls which tools are exposed. The LLM model is independently configurable via llm_model in ~/.config/ai-memory/config.toml. For example, run autonomous tier (all 17 tools + reranker) with the faster e2b model:

# ~/.config/ai-memory/config.toml
tier = "autonomous"        # all features enabled
llm_model = "gemma4:e2b"   # faster model (46 tok/s vs 26 tok/s for e4b)

The --tier flag must be passed in the MCP args -- the config.toml tier setting is not used when the server is launched by an AI client.

# Keyword (default)
ai-memory mcp

# Semantic -- hybrid recall with embeddings
ai-memory mcp --tier semantic

# Smart -- adds LLM-powered query expansion, auto-tagging, contradiction detection
ai-memory mcp --tier smart

# Autonomous -- adds cross-encoder reranking
ai-memory mcp --tier autonomous

The memory_capabilities tool reports the active tier, loaded models, and available capabilities at runtime.

MCP Tools

These 17 tools are available to any MCP-compatible AI when configured as an MCP server:

HTTP API

20 endpoints on 127.0.0.1:9077. Start with ai-memory serve.

CLI Commands

25 commands. Run ai-memory <command> --help for details on any command.

The top-level ai-memory binary also accepts global flags:

The store subcommand accepts additional flags:

The mcp subcommand accepts an additional flag:

Recall Scoring

Every recall query ranks memories by 6 factors:

score = (fts_relevance * -1)
      + (priority * 0.5)
      + (MIN(access_count, 50) * 0.1)
      + (confidence * 2.0)
      + tier_boost
      + recency_decay

Memory Tiers

Automatic Behaviors

• TTL extension on recall: short memories get +1 hour, mid memories get +1 day
• Auto-promotion: mid-tier memories accessed 5+ times promote to long (expiry cleared)
• Priority reinforcement: every 10 accesses, priority increases by 1 (capped at 10)
• Contradiction detection: warns when a new memory conflicts with an existing one in the same namespace
• Deduplication: upsert on title+namespace; tier never downgrades on update

Security

ai-memory includes hardening across all input paths:

• Transaction safety -- all multi-step database operations use transactions; no partial writes on failure
• FTS injection prevention -- user input is sanitized before reaching FTS5 queries; special characters are escaped
• Error sanitization -- internal database paths and system details are stripped from error responses; clients see structured error types (NOT_FOUND, VALIDATION_FAILED, DATABASE_ERROR, CONFLICT)
• Body size limits -- HTTP request bodies are capped at 50 MB via Axum's DefaultBodyLimit
• Bulk operation limits -- bulk create endpoints enforce maximum batch sizes to prevent resource exhaustion
• CORS -- permissive CORS layer enabled for localhost development workflows
• Input validation -- every write path validates title length, content length, namespace format, source values, priority range (1-10), confidence range (0.0-1.0), tag format, tier values, relation types, and ID format
• Link validation in sync -- all links are validated (both IDs, relation type, no self-links) before import during sync operations
• Thread-safe color -- terminal color detection uses AtomicBool for safe concurrent access
• Local-only HTTP -- the HTTP server binds to 127.0.0.1 by default; not exposed to the network
• WAL mode -- SQLite Write-Ahead Logging for safe concurrent reads during writes

Documentation

License

Copyright (c) 2026 AlphaOne LLC. All rights reserved.

Licensed under the MIT License.

THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.