The open-source, AI-native data platform.

Unify your data. Add intelligence. Ship faster.

What is MemberJunction?

MemberJunction is a metadata-driven application platform that turns your database into a fully functional application — complete with auto-generated APIs, forms, security, and deep AI integration. Define your schema, and MJ generates everything else: typed entity classes, GraphQL endpoints, Angular UI components, validation, and audit trails.

What makes it different: 175 modular TypeScript packages that work together or independently, 15+ AI providers behind a single abstraction layer, and an agent framework for building autonomous workflows — all driven by metadata, not boilerplate.

// Three lines to load, modify, and save any entity — fully typed, validated, and audited
const md = new Metadata();
const customer = await md.GetEntityObject<CustomerEntity>('Customers');
await customer.Load(customerId);
customer.Status = 'Active';
await customer.Save(); // Triggers validation, audit logging, and downstream actions automatically

// Swap AI providers with zero code changes
const ai = new AIEngine();
const result = await ai.ChatCompletion({
  model: 'gpt-4o',          // or 'claude-sonnet-4-5-20250929', 'gemini-pro', 'llama-3', ...
  messages: [{ role: 'user', content: 'Summarize this quarter\'s metrics' }],
  data: await rv.RunView({ EntityName: 'Quarterly Reports', ResultType: 'simple' })
});

Key Capabilities

Quick Start

# Clone and install
git clone https://github.com/MemberJunction/MJ.git && cd MJ
npm install

# Configure your database and auth
cp install.config.json.example install.config.json
# Edit install.config.json with your SQL Server connection and auth settings

# Initialize the database
node InstallMJ.js

# Start the platform
npm run start:api        # GraphQL API on port 4000
npm run start:explorer   # Angular UI on port 4200

Prerequisites: Node.js 20+, npm 9+, SQL Server 2019+ (or Azure SQL), Angular CLI 21+

Full documentation: docs.memberjunction.org

Architecture

flowchart TD
    subgraph Client["Client Layer"]
        EX["MJExplorer<br/>Angular 21 UI"]
        CLI["MJCLI<br/>Command Line"]
        MCP["MCP Clients<br/>Claude Desktop, Cursor"]
    end

    subgraph API["API Layer"]
        GQL["GraphQL API<br/>@memberjunction/server"]
        MCPS["MCP Server"]
        A2A["A2A Server"]
    end

    subgraph Core["Core Engine"]
        META["Metadata Engine<br/>@memberjunction/core"]
        ENT["Entity Framework<br/>Typed classes, validation, audit"]
        ACT["Actions Engine<br/>Workflows, scheduling"]
    end

    subgraph AI["AI Layer"]
        AIE["AI Engine<br/>Provider routing"]
        AGT["Agent Framework<br/>Autonomous workflows"]
        VEC["Vectors<br/>Embeddings, search, sync"]
        PRV["15+ Providers<br/>OpenAI, Anthropic, Google..."]
    end

    subgraph Data["Data Layer"]
        SQL["SQL Server<br/>Data Provider"]
        COMM["Communication<br/>Email, SMS, Push"]
    end

    EX --> GQL
    CLI --> GQL
    MCP --> MCPS
    MCPS --> META
    A2A --> AGT
    GQL --> META
    META --> ENT
    META --> ACT
    ENT --> SQL
    ACT --> AIE
    AIE --> PRV
    AIE --> AGT
    AGT --> VEC
    ACT --> COMM

    style Client fill:#2d6a9f,stroke:#1a4971,color:#fff
    style API fill:#2d8659,stroke:#1a5c3a,color:#fff
    style Core fill:#b8762f,stroke:#8a5722,color:#fff
    style AI fill:#7c5295,stroke:#563a6b,color:#fff
    style Data fill:#64748b,stroke:#475569,color:#fff

Full package directory with 175 packages | packages/ overview

AI Providers

Connect to any major AI service through a unified API — swap providers with zero code changes:

Specialized: ElevenLabs (TTS) · HeyGen (video) · BlackForestLabs (image gen) · Pinecone (vectors)

Agent Framework

Build autonomous AI agents that orchestrate complex, multi-step workflows:

• AI Agents — Core execution engine with hierarchical prompt composition, sub-agent delegation, and automatic context compression
• LoopAgentType — Iterative agents with ForEach/While operations (90% token reduction for batch tasks)
• FlowAgentType — Deterministic workflow graphs with conditional branching and parallel execution
• MCP Server — Expose MJ entities and agents as tools for Claude Desktop, Cursor, and other MCP clients
• A2A Server — Google's Agent-to-Agent protocol for cross-platform agent interop
• Prompt Engine — Hierarchical templates, model selection, effort level control, and execution tracking

Deployment

# Docker
docker build -f docker/MJAPI/Dockerfile -t memberjunction/api .
docker-compose up -d

# Database migrations (Flyway)
# Versioned migrations in /migrations/v2/ run automatically on startup

Security: Auth0 + Azure AD (MSAL) authentication, row-level security, field permissions, GraphQL query depth limiting, and complete audit logging.

Upgrading

• v5.0 Upgrade Guide — Breaking changes, automated migration tools, and step-by-step instructions for upgrading from v4.x
• General Upgrade Procedure — Standard process for upgrading across environments (dev/stage/prod)

Contributing

We welcome contributions!

• GitHub Issues — Bug reports and feature requests
• Discussions — Questions and ideas
• Documentation — Full platform docs
• Development Guide — See CLAUDE.md for coding standards, naming conventions, and architecture guidelines

License

MemberJunction is open source under the ISC License.

📦 Full Package Directory

Every package in the MemberJunction monorepo, organized by directory. Click any package to jump to its README.

Actions

Metadata-driven action framework for workflows, agents, and automation (13 packages).

Core

Integrations

Scheduling

Actions / BizApps

Business application-specific actions for integrating with external business systems.

AI

AI infrastructure -- model abstractions, provider implementations, vector operations, agent management, and supporting tools (42 packages).

Core Packages

Protocol and Server Packages

CLI

AI / Providers

LLM, embedding, cloud-platform, local-inference, and specialty AI provider implementations (23 packages).

LLM Providers

Cloud Platform Providers

Inference Routers and Aggregators

Local Inference

Specialized Providers

Vector Database Providers

Recommendation Providers

Meta / Utility

AI / Vectors

Vector storage, search, and synchronization (5 packages).

AI / AgentManager

Meta-agent system for creating, managing, and orchestrating AI agents (2 packages).

AI / Recommendations

Provider-agnostic recommendation engine framework (1 package).

Angular

Angular UI framework -- the Bootstrap package, Explorer application components, and a comprehensive library of reusable generic components (61 packages).

Angular / Explorer

The MJExplorer application -- MemberJunction's primary Angular-based UI for browsing, editing, and managing data (19 packages).

Core / Shell

Forms & Entity Editing

Data Grids & Lists

Dashboards

Utility & Navigation

Angular / Generic

Reusable Angular components and services shared across MemberJunction applications (41 packages).

Core & Base Types

AI & Chat

Entity & Data

Actions & Workflows

Query & Reporting

Dashboard & Layout

Credentials & Permissions

UI Utilities

APIKeys

Server-side API key authorization with hierarchical scopes and pattern-based access control (2 packages).

Communication

Multi-channel messaging -- message composition, delivery, and entity-level integration (10 packages).

Communication / Providers

Email and SMS delivery provider implementations.

Credentials

Secure credential management (1 package).

React

React component infrastructure for the MemberJunction platform (2 packages).

Scheduling

Distributed scheduled-jobs system with cron-based scheduling and plugin-based execution (4 packages).

Templates

Extensible templating engine with AI-powered content generation (2 packages).

TestingFramework

Metadata-driven testing framework supporting agent evals and multi-oracle evaluation (3 packages).

Standalone Packages

Packages at the top level of the packages/ directory, not part of a multi-package group.

Core Framework

Data Layer

Server

Code Generation and Tooling

Client Applications

Utilities

Documentation · Issues · Discussions · Support

_{Built with TypeScript · Angular 21 · SQL Server · Open source under ISC License}