Click2code/mcp-server
3.2
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A minimalistic example to demonstrate how to build and deploy a Model Context Protocol (MCP) server using FastAPI and Chroma DB.
Prior Authorization System
End-to-end Prior Authorization decision-support system with a multi-agent AI pipeline, MCP Tool Registry, and PostgreSQL backend.
Original wireframe: https://www.figma.com/design/5qn3BZ9VfJ2eoa06sytSY0/Prior-Authorization-Wireframe
Tech Stack
- Frontend: React 18 + Vite + Tailwind CSS + shadcn/ui
- Backend: Express.js (ESM) with JWT authentication
- Database: PostgreSQL 16 (6 tables, 400+ seed rows)
- AI Pipeline: 4 agents + 6 MCP tools + 9-step processing pipeline
Prerequisites
- Node.js 18+
- PostgreSQL 16+
- npm
Setup
# 1. Install frontend dependencies
npm install
# 2. Install backend dependencies
cd server && npm install && cd ..
# 3. Create database
createdb prior_auth_db
# 4. Run schema + seed data (15 members, 75 claims, 15 policies, 15 PA requests)
node server/db/setup.js
# 5. Create .env.local for frontend API URL
echo "VITE_API_BASE_URL=http://localhost:3001/api/v1" > .env.local
Running
# Start backend (port 3001)
node server/index.js
# Start frontend (port 5173) — in a new terminal
npm run dev
Demo Credentials
| Username | Password | Role |
|---|---|---|
| admin | admin123 | Medical Director |
| nurse | nurse123 | Clinical Reviewer |
| analyst | analyst123 | Claims Analyst |
Verification
# Health check
curl http://localhost:3001/api/v1/health
# List MCP tools
curl http://localhost:3001/api/v1/mcp/tools
# List PA requests
curl http://localhost:3001/api/v1/requests
Database Reset
node server/db/setup.js --reset
Architecture
See for full architecture documentation covering database schema, MCP tool registry, agent pipeline, API routes, and frontend integration.
