# Migration Summary: EY Census MCP Server → Twenty CRM MCP Server
## Overview
Successfully transformed the EY Census Data MCP Server into a Twenty CRM MCP Server with full GraphQL and REST API support.
## Major Changes
### 1. Branding & Configuration
- **package.json**: Updated name to `twenty-crm-mcp-server`, removed EY references
- **README.md**: Complete rewrite focusing on Twenty CRM capabilities
- **mcp.json**: Changed server name from `census` to `twenty-crm`
- **index.ts**: Updated home page configuration with Twenty CRM branding
- **public/index.html**: Removed EY logo, simplified header
- **k8s/deployment.yaml**: Updated deployment name, removed EY namespace, added Twenty API configuration
### 2. Dependencies Added
- `graphql`: ^16.9.0
- `graphql-request`: ^7.1.2
- `zod`: ^3.24.1
- `zod-to-json-schema`: ^3.24.1
### 3. New Infrastructure Layer
#### GraphQL Client (`src/infrastructure/clients/twenty-graphql-client.ts`)
- Full GraphQL client for Twenty CRM API
- Supports queries and mutations
- Error handling and logging
- Configurable via environment variables
#### REST Client (`src/infrastructure/clients/twenty-rest-client.ts`)
- Complete REST client for Twenty CRM API
- Supports GET, POST, PATCH, DELETE operations
- Query parameter building
- Response handling with error management
### 4. New Domain Types (`src/domain/twenty-types.ts`)
Defined TypeScript interfaces for:
- **Person**: firstName, lastName, email, phone, city, companyId, position
- **Company**: name, domainName, address, employees, idealCustomerProfile
- **Opportunity**: name, amount, closeDate, stage, probability, companyId, pointOfContactId
- **Note**: title, body, position
- **Task**: title, body, dueAt, status, assigneeId, position
### 5. Application Layer Tools
#### Person Tools (`src/application/tools/person-tool.ts`)
- `create-person`: Create new person records
- `get-person`: Retrieve person by ID
- `update-person`: Update person information
- `delete-person`: Delete person records
- `list-persons`: List persons with filtering (by company)
#### Company Tools (`src/application/tools/company-tool.ts`)
- `create-company`: Create new companies
- `get-company`: Retrieve company by ID
- `list-companies`: List all companies with pagination
#### Opportunity Tools (`src/application/tools/opportunity-tool.ts`)
- `create-opportunity`: Create sales opportunities
- `get-opportunity`: Retrieve opportunity by ID
- `list-opportunities`: List opportunities with filtering (by company)
### 6. Server Updates (`src/server.ts`)
- Removed census API client
- Added Twenty GraphQL and REST clients
- Replaced population tool with Person, Company, and Opportunity tools
- Registered 11 new MCP tools (5 Person, 3 Company, 3 Opportunity)
- Updated initialization logging
### 7. Configuration Files
#### Environment Variables (.env.example)
```bash
TWENTY_API_URL=https://api.twenty.com
TWENTY_API_KEY=your_api_key_here
PORT=5008
HOST=0.0.0.0
NODE_ENV=development
```
#### Kubernetes Deployment
- Changed deployment name to `twenty-crm-mcp-server`
- Removed EY-specific namespace
- Added Twenty API configuration via secrets
- Updated service names
## Files Removed (Old Census Implementation)
The following old census files still exist but are no longer used:
- `src/domain/census-service.ts`
- `src/application/tools/population-tool.ts`
- `src/infrastructure/clients/census-api-client.ts`
These can be safely deleted if not needed for reference.
## Architecture
```
src/
├── application/
│ └── tools/
│ ├── person-tool.ts (NEW - 5 operations)
│ ├── company-tool.ts (NEW - 3 operations)
│ ├── opportunity-tool.ts (NEW - 3 operations)
│ └── tool-registry.ts (UPDATED)
├── domain/
│ ├── twenty-types.ts (NEW)
│ └── types.ts (EXISTING)
├── infrastructure/
│ └── clients/
│ ├── twenty-graphql-client.ts (NEW)
│ └── twenty-rest-client.ts (NEW)
└── server.ts (UPDATED)
```
## API Support
### GraphQL API
- Full support for complex queries
- Batch operations
- Relationship traversal
- Endpoint: `https://api.twenty.com/graphql`
### REST API
- CRUD operations
- Simple request/response
- Query parameters for filtering
- Endpoint: `https://api.twenty.com/rest`
## Next Steps
1. **Set up environment variables**:
```bash
cp .env.example .env
# Edit .env with your Twenty CRM API key
```
2. **Test locally**:
```bash
npm install
npm run build
npm start
# Visit http://localhost:5008
```
3. **Deploy to Kubernetes**:
```bash
# Create secret with your API key
kubectl create secret generic twenty-crm-secrets \
--from-literal=api-key=YOUR_API_KEY
# Deploy
npm run docker-build
npm run deploy
```
4. **Optional cleanup**:
```bash
# Remove old census files if not needed
rm src/domain/census-service.ts
rm src/application/tools/population-tool.ts
rm src/infrastructure/clients/census-api-client.ts
rm census-context.yaml
```
## Testing
The server includes:
- Interactive web interface at `http://localhost:5008`
- MCP Inspector support
- Health check endpoint at `/health`
- Full MCP protocol compliance
## Security Notes
- API keys stored in environment variables
- Kubernetes deployment uses secrets
- Never commit `.env` files
- Rotate API keys regularly
- Use appropriate RBAC in Twenty CRM
## Documentation
- **Twenty CRM API Docs**: https://docs.twenty.com/developers/extend/capabilities/apis
- **Twenty CRM Objects**: https://docs.twenty.com/
- **MCP Protocol**: https://modelcontextprotocol.io/
## Build Status
✅ TypeScript compilation successful
✅ All dependencies installed
✅ Server builds without errors
✅ Ready for deployment
