MCP Moira

Agent Workflow Engine for AI agents.

Primary users: AI agents via MCP protocol. Web UI is supplementary for workflow management.

See docs/VISION.md for product vision and design principles.

Two ways to run Moira

• Self-host (this repository, Apache-2.0) — run the full engine + Web UI + MCP server and its ingress through Docker Compose on your own infrastructure. Free and open source; your data stays with you. Start in the Quick Start below.
• Moira Cloud (managed) — a hosted instance with nothing to operate, at moira-mcp.com.

Both run the same engine and MCP tools. Self-host is a single-tenant private-team deployment with administrator-approved accounts. Cloud adds managed hosting and SaaS-only policy and administration, including social login, legal consent, email verification, and the broader multi-user administration surface.

Architecture

Monorepo: Clean separation of concerns with npm workspaces Workflow Engine: Node-graph execution over a set of node types (@mcp-moira/workflow-engine) MCP Server: HTTP protocol server exposing the MCP tools (@mcp-moira/mcp-server) Web Backend: Express API server (@mcp-moira/web-backend) Web Frontend: React UI with webpack (@mcp-moira/web-frontend) Docs: Astro 5 + Starlight documentation site, EN+RU (@mcp-moira/docs) Shared: Database layer + Better Auth + logging (@mcp-moira/shared) Database: Modular repository pattern with Drizzle ORM Settings System: Universal settings with encryption and dynamic UI generation Docker Deployment: Multi-stage container with TypeScript validation Validation: JSON Schema with AJV

Package Structure

• packages/workflow-engine/ - Core node-graph execution engine
• packages/extension-sdk/ - Typed authoring contract for custom nodes and communication channels
• packages/extension-runner/ - Isolated companion service for installed extension bundles
• packages/local/ - User-owned Docker Sandboxes companion for local codespaces
• packages/workspace-service/ - Common guest command, file and session service with its Unix-socket CLI
• packages/mcp-server/ - MCP protocol HTTP server with tools
• packages/web-backend/ - Express API for workflow management
• packages/web-frontend/ - React UI for workflow visualization
• packages/docs/ - Astro 5 + Starlight documentation site (EN+RU), built into the image and served at /docs
• packages/shared/ - Database layer (schema, connection, repositories) + Better Auth + logging
  • database/ - Modular repositories (Workflow, Execution, Settings)
  • auth/ - Better Auth configuration
  • logging/ - Structured logging
• Docker Config (config/) - Unified container deployment configuration

Quick Start

Self-Host (recommended)

Run a complete Moira instance locally with Docker — no source build required:

cp .env.example .env       # defaults work locally; review host, port, and artifact domain for another host
docker compose up -d

Then open:

• Web UI: http://localhost:8080
• Documentation: http://localhost:8080/docs/
• MCP endpoint: http://localhost:8080/mcp