mcp-enrichment

@opafex/mcp-enrichment

MCP server for multi-source entity enrichment — company data, contact lookup, email verification, phone validation, and email discovery.

Uses Clearbit, Hunter.io, and Twilio APIs. Works in mock mode with no API keys configured.

Installation

# Clone and build from source
git clone https://github.com/opafex/opafex-mcps.git
cd opafex-mcps
npm install && npm run build

Requires Node.js 20+.

Quick Start

Add to Claude Code / Claude Desktop

Create or edit .mcp.json in your project root:

{
  "mcpServers": {
    "enrichment": {
      "command": "node",
      "args": ["/path/to/opafex-mcps/packages/enrichment/dist/index.js"],
      "env": {
        "CLEARBIT_API_KEY": "sk-...",
        "HUNTER_API_KEY": "...",
        "TWILIO_ACCOUNT_SID": "...",
        "TWILIO_AUTH_TOKEN": "..."
      }
    }
  }
}

Omit the env block to run in mock mode.

Tools

enrich_company

Enrich company data from a domain name or company name. Returns industry, employee count, funding, tech stack, social profiles, and more.

Provider: Clearbit

{
  "success": true,
  "company": {
    "name": "Company for stripe.com",
    "domain": "stripe.com",
    "description": "A leading technology company specializing in innovative solutions.",
    "industry": "Technology",
    "sector": "Software",
    "employees": 150,
    "employeesRange": "101-250",
    "founded": 2015,
    "location": { "city": "London", "country": "United Kingdom" },
    "socialProfiles": { "linkedin": "https://linkedin.com/company/example" },
    "techStack": ["React", "Node.js", "PostgreSQL", "AWS"],
    "type": "private"
  },
  "provider": "mock",
  "cached": false,
  "timestamp": "2026-03-15T00:00:00.000Z"
}

enrich_contact

Enrich contact/person data from an email address or LinkedIn URL.

Provider: Clearbit

verify_email

Verify an email address for deliverability. Returns validity, deliverability score, disposable/free provider detection, role-based detection, and SMTP validation.

Provider: Hunter.io

{
  "success": true,
  "email": "[email protected]",
  "valid": true,
  "deliverable": true,
  "disposable": false,
  "freeProvider": false,
  "role": false,
  "score": 95,
  "provider": "mock",
  "cached": false
}

verify_phone

Validate and look up a phone number. Returns validity, formatted number, line type (mobile/landline/voip), carrier info, and location.

Provider: Twilio

find_email

Find the email address for a specific person at a company.

Provider: Hunter.io

{
  "success": true,
  "email": "[email protected]",
  "score": 85,
  "sources": ["LinkedIn", "Company Website"],
  "provider": "mock",
  "cached": false
}

server_info (built-in)

Returns server metadata: name, version, registered tools, and resources. Added automatically by @opafex/mcp-shared.

Resources

Mock Mode

When no API keys are configured, all tools return realistic mock data. This is great for development and testing — you can build against the MCP without any API accounts.

Mock mode activates automatically:

• Globally when none of CLEARBIT_API_KEY, HUNTER_API_KEY, or TWILIO_ACCOUNT_SID are set
• Per-tool when the specific provider key is missing (e.g. if you only set CLEARBIT_API_KEY, company/contact tools use real data while email/phone tools fall back to mock)

Check enrichment://status resource or the server_info tool to see which providers are active.

Environment Variables

Development

npm run build    # Compile TypeScript
npm run dev      # Run with tsx (no build needed)
npm test         # Run tests
npm start        # Run compiled server

Library Usage

The enrichment service can be used programmatically (not just as an MCP server):

import { EnrichmentService } from '@opafex/mcp-enrichment/service';
import type { CacheProvider } from '@opafex/mcp-enrichment/service';

const service = new EnrichmentService({
  clearbitApiKey: 'sk-...',
  hunterApiKey: '...',
});

const result = await service.enrichCompany({ domain: 'stripe.com' });

Custom Cache Provider

The default in-memory cache works out of the box. For Redis, SQLite, or any custom store, implement the CacheProvider interface:

import { EnrichmentService } from '@opafex/mcp-enrichment/service';
import type { CacheProvider } from '@opafex/mcp-enrichment/service';

const redisCache: CacheProvider = {
  async get(key) { /* ... */ },
  async set(key, data, ttlMs) { /* ... */ },
  async delete(key) { /* ... */ },
  async clear() { /* ... */ },
};

const service = new EnrichmentService({
  clearbitApiKey: '...',
  cache: redisCache,
});

Contributing

Found a bug or have a feature request? Open an issue.

Pull requests welcome — see the main repo for development setup.

License

MIT — see LICENSE.