Memora
A lightweight MCP server for semantic memory storage, knowledge graphs, and cross-session context
Memora
"You never truly know the value of a moment until it becomes a memory."
Give your AI agents persistent memory
A lightweight MCP server for semantic memory storage, knowledge graphs, conversational recall, and cross-session context.
Features · Install · Usage · Config · Live Graph · Cloud Graph · Chat · Semantic Search · LLM Dedup · Linking · Neovim
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)
- 💬 Chat with Memories - RAG-powered chat panel with LLM tool calling to search, create, update, and delete memories via streaming chat
- 📡 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
pip install git+https://github.com/agentic-box/memora.git
Includes cloud storage (S3/R2) and OpenAI embeddings out of the box.
# Optional: local embeddings (offline, ~2GB for PyTorch)
pip install "memora[local]" @ git+https://github.com/agentic-box/memora.git
Usage
The server runs automatically when configured in Claude Code. Manual invocation:
# 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
Configuration
Claude Code
Add to .mcp.json in your project root:
Local DB:
{
"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:
{
"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 DB (S3/R2) - Sync mode:
{
"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:
[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",
}
Environment Variables
| 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: openai (default), sentence-transformers, or tfidf |
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) |
CHAT_MODEL | Model for the chat panel (default: deepseek/deepseek-chat, falls back to MEMORA_LLM_MODEL) |
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 |
Semantic Search & Embeddings
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_MODELafter memories exist - Switching to a different sentence-transformers model
# After changing embedding model, rebuild all embeddings
memory_rebuild_embeddings
# Then rebuild cross-references to update the knowledge graph
memory_rebuild_crossrefs
Live Graph Server
A built-in HTTP server starts automatically with the MCP server, serving an interactive knowledge graph visualization.
![]() Details Panel | ![]() Timeline Panel |
Access locally:
http://localhost:8765/graph
Remote access via SSH:
ssh -L 8765:localhost:8765 user@remote
# Then open http://localhost:8765/graph in your browser
Configuration:
{
"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)
- Chat Panel - Ask questions about your memories using RAG-powered LLM chat with streaming responses and clickable
[Memory #ID]references - 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.
Cloud Graph (Recommended for D1)
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:
-
Create D1 database:
npx wrangler d1 create memora-graph npx wrangler d1 execute memora-graph --file=memora-graph/schema.sql -
Deploy Pages:
cd memora-graph npx wrangler pages deploy ./public --project-name=memora-graph -
Configure bindings in Cloudflare Dashboard:
- Pages → memora-graph → Settings → Bindings
- Add D1:
DB_MEMORA→ your database - Add R2:
R2_MEMORA→ your bucket (for images)
-
Configure MCP with D1 URI:
{ "env": { "MEMORA_STORAGE_URI": "d1://<account-id>/<database-id>", "CLOUDFLARE_API_TOKEN": "<your-token>" } }
Access: https://memora-graph.pages.dev
Secure with Zero Trust:
- Cloudflare Dashboard → Zero Trust → Access → Applications
- Add application for
memora-graph.pages.dev - Create policy with allowed emails
- Pages → Settings → Enable Access Policy
See memora-graph/ for detailed setup and multi-database configuration.
Chat with Memories
Ask questions about your knowledge base directly from the graph UI. The chat panel uses RAG (Retrieval-Augmented Generation) to search relevant memories and stream LLM responses with tool calling support.
- Toggle via the floating chat icon at bottom-right
- Semantic search finds the most relevant memories as context
- Streaming responses with clickable
[Memory #ID]references that focus the graph node - Tool calling — the LLM can create, update, and delete memories directly from chat (e.g., "save this as a memory", "delete memory #42", "update memory #10 with...")
- Works on both the local server and Cloudflare Pages deployment
Configure the chat model:
| Backend | Variable | Default |
|---|---|---|
| Local server | CHAT_MODEL env var | Falls back to MEMORA_LLM_MODEL |
| Cloudflare Pages | CHAT_MODEL in wrangler.toml | deepseek/deepseek-chat |
Requires an OpenAI-compatible API (OPENAI_API_KEY + OPENAI_BASE_URL for local, OPENROUTER_API_KEY secret for Cloudflare). The chat model must support tool use (function calling).
LLM Deduplication
Find and merge duplicate memories using AI-powered semantic comparison:
# 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 scorereasoning: Brief explanationsuggested_action: "merge", "keep_both", or "review"
Works with any OpenAI-compatible API (OpenAI, OpenRouter, Azure, etc.) via OPENAI_BASE_URL.
Memory Automation Tools
Structured tools for common memory types:
# 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")
Memory Insights
Analyze stored memories and surface actionable insights:
# 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)
Memory Linking
Manage relationships between memories:
# 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)
Knowledge Graph Export (Optional)
For offline viewing, export memories as a static HTML file:
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.
Neovim Integration
Browse memories directly in Neovim with Telescope. Copy the plugin to your config:
# 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.
Похожие серверы
Tidewrath
Play a roguelike MMO as an AI agent. Explore, fight, chat, and survive tsunamis via 50+ MCP tools
Stock Analysis
An MCP server for stock analysis, offering tools for chip distribution, pattern analysis, trend reversal detection, and market scanning.
AILibrary MCP Server
API for AI agents to search, license, and download b-roll video clips and voiceovers. Pay-per-request, no human interaction required.
KSeF
MCP server for Poland's national e-invoicing system KSeF (Krajowy System e-Faktur). Provides 12 tools for complete KSeF API integration including session management, invoice querying/submission, export generation, and system monitoring. Built with Rust for reliability and performance. Perfect for Polish businesses automating e-invoicing processes and developers building KSeF compliance tools.
NWC MCP Server
Control a Lightning wallet using Nostr Wallet Connect (NWC).
MCP Time Server
A simple server that provides the current UTC time.
Vintage Chocolate Recipes (1914)
146 historic chocolate recipes from 1914. Search cakes, candies, and beverages from Maria Parloa's classic cookbook.
Audio Player
An MCP server for controlling local audio file playback.
Crypto Trader
Provides real-time cryptocurrency market data using the CoinGecko API.
Universal Image MCP
Universal MCP server for AI image generation supporting AWS Bedrock (Nova Canvas), OpenAI (GPT Image, DALL-E), and Google Gemini (Imagen 4). Generate, transform, and edit images using multiple AI models through a single Model Context Protocol interface.

