B2B Lead Enrichment MCP API
The MCP-native API that AI agents use to enrich B2B company profiles with structured data.
Live Production URL
https://lead-enrichment-mcp.agent-infra.workers.dev
Status: Live and accepting requests
Quick Start
curl https://lead-enrichment-mcp.agent-infra.workers.dev/health
curl -X POST https://lead-enrichment-mcp.agent-infra.workers.dev/mcp \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"enrich_lead","arguments":{"domain":"stripe.com"}}}'
Pricing
| Tier | Monthly | Price | Overage |
|---|
| Free | 100 enrichments | $0 | N/A |
| Pro | 10,000 enrichments | $49/month | $0.05/enrichment |
| Enterprise | Unlimited | Contact us | Custom |
Billing: Only for successful, high-confidence enrichments (confidence > 0.6). No charge for failed or low-quality enrichments.
Get an API Key
- Visit https://lead-enrichment-mcp.agent-infra.workers.dev
- Sign up for free tier or upgrade
- Copy your API key
MCP-Native for AI Agents
This API is built on the Model Context Protocol (MCP), making it natively discoverable and callable by AI agents like Claude, Cursor, and ChatGPT.
Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"lead-enrichment": {
"command": "npx",
"args": ["-y", "@anthropic-ai/mcp-server-lead-enrichment"],
"env": {
"API_KEY": "your-api-key-here"
}
}
}
}
Cursor
Add in Cursor Settings > MCP > Add New Server:
{
"mcpServers": {
"lead-enrichment": {
"type": "http",
"url": "https://lead-enrichment-mcp.agent-infra.workers.dev/mcp",
"headers": {
"Authorization": "Bearer your-api-key-here"
}
}
}
}
VS Code Copilot
Create .vscode/mcp.json:
{
"servers": {
"lead-enrichment": {
"transport": "streamable-http",
"url": "https://lead-enrichment-mcp.agent-infra.workers.dev/mcp",
"headers": {
"Authorization": "Bearer your-api-key-here"
}
}
}
}
ChatGPT GPTs
Use the OpenAPI schema:
https://lead-enrichment-mcp.agent-infra.workers.dev/openapi.json
API Endpoints
| Method | Endpoint | Description |
|---|
| POST | /mcp | MCP JSON-RPC endpoint |
| GET | /health | Health check |
| GET | /.well-known/mcp-server.json | MCP Server Card |
| GET | /openapi.json | OpenAPI 3.1 spec |
| GET | /docs | Human-readable docs |
| GET | /test/enrich?domain=stripe.com | Test endpoint (auth required) |
Example Response
For stripe.com:
{
"companyName": "Stripe, Inc.",
"industry": "Fintech",
"employeeCount": "5000+",
"revenue": "$1B+",
"technologies": [
"React",
"Ruby on Rails",
"PostgreSQL",
"Redis",
"Kubernetes",
"AWS"
],
"intentSignals": [
"Recently hired 3 Sales VPs in Q2 2026",
"Expanding EU operations with new Dublin office"
],
"confidenceScore": 0.95,
"enrichedAt": "2026-06-19T12:00:00.000Z",
"insights": [
"High buying intent: Recently hired multiple sales VPs indicating expansion phase",
"Enterprise-grade requirements suggest need for robust security and compliance features",
"European expansion signals potential need for multi-currency and regional compliance"
]
}
When to Use
- Qualify a lead before outreach
- Research a company before a sales call
- Enrich a list of companies for a campaign
- Understand a prospect's technology stack
- Detect buying intent signals
| Parameter | Type | Required | Description |
|---|
domain | string | Yes | Company domain (e.g., "stripe.com") |
attributes | string[] | No | Data types: firmographic, technographic, intent, contacts |
requiredFields | string[] | No | Fields that must be present |
Error Handling
All errors follow RFC 9457 Problem Details format:
{
"type": "https://api.lead-enrichment-mcp.com/errors/rate-limit-exceeded",
"title": "Rate Limit Exceeded",
"detail": "You have exceeded the rate limit...",
"status": 429,
"extensions": {
"code": "RATE_LIMIT_EXCEEDED",
"retry_after": 60
}
}
Rate Limits
| Tier | Burst | Sustained |
|---|
| Free | 10 req/sec | 5 req/sec |
| Pro | 50 req/sec | 20 req/sec |
Development
npm install
npm run dev
npm run deploy
Tech Stack
- Hono (TypeScript) - Fast, lightweight web framework
- Cloudflare Workers - Edge runtime
- Zod - Schema validation with .describe() annotations
- MCP SDK - Model Context Protocol
- Stripe - Metered billing
License
MIT