Content
<h1 align="center"><img src="media/memora_new.gif" width="60" alt="Memora Logo" align="absmiddle"> Memora</h1>
<p align="center"><sub><sub><i>"You never truly know the value of a moment until it becomes a memory."</i></sub></sub></p>
<p align="center">
<b>Give your AI agents persistent memory</b><br>
A lightweight MCP server for semantic memory storage, knowledge graphs, and cross-session context.
</p>
<p align="center">
<a href="https://github.com/agentic-mcp-tools/memora/releases"><img src="https://img.shields.io/github/v/tag/agentic-mcp-tools/memora?label=version&color=blue" alt="Version"></a>
<a href="LICENSE"><img src="https://img.shields.io/badge/license-MIT-green" alt="License"></a>
<a href="https://github.com/thedotmack/awesome-claude-code"><img src="https://awesome.re/mentioned-badge.svg" alt="Mentioned in Awesome Claude Code"></a>
</p>
<p align="center">
<img src="media/demo.gif" alt="Memora Demo" width="800">
</p>
<p align="center">
<b><a href="#features">Features</a></b> · <b><a href="#install">Install</a></b> · <b><a href="#usage">Usage</a></b> · <b><a href="#configuration">Config</a></b> · <b><a href="#live-graph-server">Live Graph</a></b> · <b><a href="#cloud-graph">Cloud Graph</a></b> · <b><a href="#semantic-search--embeddings">Semantic Search</a></b> · <b><a href="#llm-deduplication">LLM Dedup</a></b> · <b><a href="#memory-linking">Linking</a></b> · <b><a href="#neovim-integration">Neovim</a></b>
</p>
## Features
**Core Storage**
- 💾 **Persistent Storage** - SQLite with optional cloud sync (S3, R2, D1)
- 📂 **Hierarchical Organization** - Section/subsection structure with auto-hierarchy assignment
- 📦 **Export/Import** - Backup and restore with merge strategies
**Search & Intelligence**
- 🔍 **Semantic Search** - Vector embeddings (TF-IDF, sentence-transformers, OpenAI)
- 🎯 **Advanced Queries** - Full-text, date ranges, tag filters (AND/OR/NOT), hybrid search
- 🔀 **Cross-references** - Auto-linked related memories based on similarity
- 🤖 **LLM Deduplication** - Find and merge duplicates with AI-powered comparison
- 🔗 **Memory Linking** - Typed edges, importance boosting, and cluster detection
**Tools & Visualization**
- ⚡ **Memory Automation** - Structured tools for TODOs, issues, and sections
- 🕸️ **Knowledge Graph** - Interactive visualization with Mermaid rendering and cluster overlays
- 🌐 **Live Graph Server** - Built-in HTTP server with cloud-hosted option (D1/Pages)
- 📡 **Event Notifications** - Poll-based system for inter-agent communication
- 📊 **Statistics & Analytics** - Tag usage, trends, and connection insights
- 🧠 **Memory Insights** - Activity summary, stale detection, consolidation suggestions, and LLM-powered pattern analysis
- 📜 **Action History** - Track all memory operations (create, update, delete, merge, boost, link) with grouped timeline view
## Install
```bash
pip install git+https://github.com/agentic-mcp-tools/memora.git
```
Includes cloud storage (S3/R2) and OpenAI embeddings out of the box.
```bash
# Optional: local embeddings (offline, ~2GB for PyTorch)
pip install "memora[local]" @ git+https://github.com/agentic-mcp-tools/memora.git
```
<details id="usage">
<summary><big><big><strong>Usage</strong></big></big></summary>
The server runs automatically when configured in Claude Code. Manual invocation:
```bash
# Default (stdio mode for MCP)
memora-server
# With graph visualization server
memora-server --graph-port 8765
# HTTP transport (alternative to stdio)
memora-server --transport streamable-http --host 127.0.0.1 --port 8080
```
</details>
<details id="configuration">
<summary><big><big><strong>Configuration</strong></big></big></summary>
### Claude Code
Add to `.mcp.json` in your project root:
**Local DB:**
```json
{
"mcpServers": {
"memora": {
"command": "memora-server",
"args": [],
"env": {
"MEMORA_DB_PATH": "~/.local/share/memora/memories.db",
"MEMORA_ALLOW_ANY_TAG": "1",
"MEMORA_GRAPH_PORT": "8765"
}
}
}
}
```
**Cloud DB (Cloudflare D1) - Recommended:**
```json
{
"mcpServers": {
"memora": {
"command": "memora-server",
"args": ["--no-graph"],
"env": {
"MEMORA_STORAGE_URI": "d1://<account-id>/<database-id>",
"CLOUDFLARE_API_TOKEN": "<your-api-token>",
"MEMORA_ALLOW_ANY_TAG": "1"
}
}
}
}
```
With D1, use `--no-graph` to disable the local visualization server. Instead, use the hosted graph at your Cloudflare Pages URL (see [Cloud Graph](#cloud-graph)).
**Cloud DB (S3/R2) - Sync mode:**
```json
{
"mcpServers": {
"memora": {
"command": "memora-server",
"args": [],
"env": {
"AWS_PROFILE": "memora",
"AWS_ENDPOINT_URL": "https://<account-id>.r2.cloudflarestorage.com",
"MEMORA_STORAGE_URI": "s3://memories/memories.db",
"MEMORA_CLOUD_ENCRYPT": "true",
"MEMORA_ALLOW_ANY_TAG": "1",
"MEMORA_GRAPH_PORT": "8765"
}
}
}
}
```
### Codex CLI
Add to `~/.codex/config.toml`:
```toml
[mcp_servers.memora]
command = "memora-server" # or full path: /path/to/bin/memora-server
args = ["--no-graph"]
env = {
AWS_PROFILE = "memora",
AWS_ENDPOINT_URL = "https://<account-id>.r2.cloudflarestorage.com",
MEMORA_STORAGE_URI = "s3://memories/memories.db",
MEMORA_CLOUD_ENCRYPT = "true",
MEMORA_ALLOW_ANY_TAG = "1",
}
```
</details>
<details id="environment-variables">
<summary><big><big><strong>Environment Variables</strong></big></big></summary>
| Variable | Description |
|------------------------|-----------------------------------------------------------------------------|
| `MEMORA_DB_PATH` | Local SQLite database path (default: `~/.local/share/memora/memories.db`) |
| `MEMORA_STORAGE_URI` | Storage URI: `d1://<account>/<db-id>` (D1) or `s3://bucket/memories.db` (S3/R2) |
| `CLOUDFLARE_API_TOKEN` | API token for D1 database access (required for `d1://` URI) |
| `MEMORA_CLOUD_ENCRYPT` | Encrypt database before uploading to cloud (`true`/`false`) |
| `MEMORA_CLOUD_COMPRESS`| Compress database before uploading to cloud (`true`/`false`) |
| `MEMORA_CACHE_DIR` | Local cache directory for cloud-synced database |
| `MEMORA_ALLOW_ANY_TAG` | Allow any tag without validation against allowlist (`1` to enable) |
| `MEMORA_TAG_FILE` | Path to file containing allowed tags (one per line) |
| `MEMORA_TAGS` | Comma-separated list of allowed tags |
| `MEMORA_GRAPH_PORT` | Port for the knowledge graph visualization server (default: `8765`) |
| `MEMORA_EMBEDDING_MODEL` | Embedding backend: `tfidf` (default), `sentence-transformers`, or `openai` |
| `SENTENCE_TRANSFORMERS_MODEL` | Model for sentence-transformers (default: `all-MiniLM-L6-v2`) |
| `OPENAI_API_KEY` | API key for OpenAI embeddings and LLM deduplication |
| `OPENAI_BASE_URL` | Base URL for OpenAI-compatible APIs (OpenRouter, Azure, etc.) |
| `OPENAI_EMBEDDING_MODEL` | OpenAI embedding model (default: `text-embedding-3-small`) |
| `MEMORA_LLM_ENABLED` | Enable LLM-powered deduplication comparison (`true`/`false`, default: `true`) |
| `MEMORA_LLM_MODEL` | Model for deduplication comparison (default: `gpt-4o-mini`) |
| `AWS_PROFILE` | AWS credentials profile from `~/.aws/credentials` (useful for R2) |
| `AWS_ENDPOINT_URL` | S3-compatible endpoint for R2/MinIO |
| `R2_PUBLIC_DOMAIN` | Public domain for R2 image URLs |
</details>
<details id="semantic-search--embeddings">
<summary><big><big><strong>Semantic Search & Embeddings</strong></big></big></summary>
Memora supports three embedding backends:
| Backend | Install | Quality | Speed |
|---------|---------|---------|-------|
| `openai` (default) | Included | High quality | API latency |
| `sentence-transformers` | `pip install memora[local]` | Good, runs offline | Medium |
| `tfidf` | Included | Basic keyword matching | Fast |
**Automatic:** Embeddings and cross-references are computed automatically when you `memory_create`, `memory_update`, or `memory_create_batch`.
**Manual rebuild required** when:
- Changing `MEMORA_EMBEDDING_MODEL` after memories exist
- Switching to a different sentence-transformers model
```bash
# After changing embedding model, rebuild all embeddings
memory_rebuild_embeddings
# Then rebuild cross-references to update the knowledge graph
memory_rebuild_crossrefs
```
</details>
<details id="live-graph-server">
<summary><big><big><strong>Live Graph Server</strong></big></big></summary>
A built-in HTTP server starts automatically with the MCP server, serving an interactive knowledge graph visualization.
<table>
<tr>
<td align="center"><img src="media/ui_details.png" alt="Details Panel" width="400"><br><em>Details Panel</em></td>
<td align="center"><img src="media/ui_timeline.png" alt="Timeline Panel" width="400"><br><em>Timeline Panel</em></td>
</tr>
</table>
**Access locally:**
```
http://localhost:8765/graph
```
**Remote access via SSH:**
```bash
ssh -L 8765:localhost:8765 user@remote
# Then open http://localhost:8765/graph in your browser
```
**Configuration:**
```json
{
"env": {
"MEMORA_GRAPH_PORT": "8765"
}
}
```
To disable: add `"--no-graph"` to args in your MCP config.
### Graph UI Features
- **Details Panel** - View memory content, metadata, tags, and related memories
- **Timeline Panel** - Browse memories chronologically, click to highlight in graph
- **History Panel** - Action log of all operations with grouped consecutive entries and clickable memory references (deleted memories shown as strikethrough)
- **Time Slider** - Filter memories by date range, drag to explore history
- **Real-time Updates** - Graph, timeline, and history update via SSE when memories change
- **Filters** - Tag/section dropdowns, zoom controls
- **Mermaid Rendering** - Code blocks render as diagrams
### Node Colors
- 🟣 **Tags** - Purple shades by tag
- 🔴 **Issues** - Red (open), Orange (in progress), Green (resolved), Gray (won't fix)
- 🔵 **TODOs** - Blue (open), Orange (in progress), Green (completed), Red (blocked)
Node size reflects connection count.
</details>
<details id="cloud-graph">
<summary><big><big><strong>Cloud Graph (Recommended for D1)</strong></big></big></summary>
When using Cloudflare D1 as your database, the graph visualization is hosted on Cloudflare Pages - no local server needed.
**Benefits:**
- Access from anywhere (no SSH tunneling)
- Real-time updates via WebSocket
- Multi-database support via `?db=` parameter
- Secure access with Cloudflare Zero Trust
**Setup:**
1. **Create D1 database:**
```bash
npx wrangler d1 create memora-graph
npx wrangler d1 execute memora-graph --file=memora-graph/schema.sql
```
2. **Deploy Pages:**
```bash
cd memora-graph
npx wrangler pages deploy ./public --project-name=memora-graph
```
3. **Configure bindings** in Cloudflare Dashboard:
- Pages → memora-graph → Settings → Bindings
- Add D1: `DB_MEMORA` → your database
- Add R2: `R2_MEMORA` → your bucket (for images)
4. **Configure MCP** with D1 URI:
```json
{
"env": {
"MEMORA_STORAGE_URI": "d1://<account-id>/<database-id>",
"CLOUDFLARE_API_TOKEN": "<your-token>"
}
}
```
**Access:** `https://memora-graph.pages.dev`
**Secure with Zero Trust:**
1. Cloudflare Dashboard → Zero Trust → Access → Applications
2. Add application for `memora-graph.pages.dev`
3. Create policy with allowed emails
4. Pages → Settings → Enable Access Policy
See [`memora-graph/`](memora-graph/) for detailed setup and multi-database configuration.
</details>
<details id="llm-deduplication">
<summary><big><big><strong>LLM Deduplication</strong></big></big></summary>
Find and merge duplicate memories using AI-powered semantic comparison:
```python
# Find potential duplicates (uses cross-refs + optional LLM analysis)
memory_find_duplicates(min_similarity=0.7, max_similarity=0.95, limit=10, use_llm=True)
# Merge duplicates (append, prepend, or replace strategies)
memory_merge(source_id=123, target_id=456, merge_strategy="append")
```
**LLM Comparison** analyzes memory pairs and returns:
- `verdict`: "duplicate", "similar", or "different"
- `confidence`: 0.0-1.0 score
- `reasoning`: Brief explanation
- `suggested_action`: "merge", "keep_both", or "review"
Works with any OpenAI-compatible API (OpenAI, OpenRouter, Azure, etc.) via `OPENAI_BASE_URL`.
</details>
<details id="memory-automation-tools">
<summary><big><big><strong>Memory Automation Tools</strong></big></big></summary>
Structured tools for common memory types:
```python
# Create a TODO with status and priority
memory_create_todo(content="Implement feature X", status="open", priority="high", category="backend")
# Create an issue with severity
memory_create_issue(content="Bug in login flow", status="open", severity="major", component="auth")
# Create a section placeholder (hidden from graph)
memory_create_section(content="Architecture", section="docs", subsection="api")
```
</details>
<details id="memory-insights">
<summary><big><big><strong>Memory Insights</strong></big></big></summary>
Analyze stored memories and surface actionable insights:
```python
# Full analysis with LLM-powered pattern detection
memory_insights(period="7d", include_llm_analysis=True)
# Quick summary without LLM (faster, no API key needed)
memory_insights(period="1m", include_llm_analysis=False)
```
Returns:
- **Activity summary** — memories created in the period, grouped by type and tag
- **Open items** — open TODOs and issues with stale detection (configurable via `MEMORA_STALE_DAYS`, default 14)
- **Consolidation candidates** — similar memory pairs that could be merged
- **LLM analysis** — themes, focus areas, knowledge gaps, and a summary (requires `OPENAI_API_KEY`)
</details>
<details id="memory-linking">
<summary><big><big><strong>Memory Linking</strong></big></big></summary>
Manage relationships between memories:
```python
# Create typed edges between memories
memory_link(from_id=1, to_id=2, edge_type="implements", bidirectional=True)
# Edge types: references, implements, supersedes, extends, contradicts, related_to
# Remove links
memory_unlink(from_id=1, to_id=2)
# Boost memory importance for ranking
memory_boost(memory_id=42, boost_amount=0.5)
# Detect clusters of related memories
memory_clusters(min_cluster_size=2, min_score=0.3)
```
</details>
<details id="knowledge-graph-export">
<summary><big><big><strong>Knowledge Graph Export (Optional)</strong></big></big></summary>
For offline viewing, export memories as a static HTML file:
```python
memory_export_graph(output_path="~/memories_graph.html", min_score=0.25)
```
This is optional - the Live Graph Server provides the same visualization with real-time updates.
</details>
<details id="neovim-integration">
<summary><big><big><strong>Neovim Integration</strong></big></big></summary>
Browse memories directly in Neovim with Telescope. Copy the plugin to your config:
```bash
# For kickstart.nvim / lazy.nvim
cp nvim/memora.lua ~/.config/nvim/lua/kickstart/plugins/
```
**Usage:** Press `<leader>sm` to open the memory browser with fuzzy search and preview.
Requires: `telescope.nvim`, `plenary.nvim`, and `memora` installed in your Python environment.
</details>
