SynID Guard API

Real-time Synthetic Identity Detection API

SynID Guard analyzes identity data to detect synthetic or fraudulent identities using advanced pattern recognition, velocity checks, and behavioral analysis. Protect your business from synthetic identity fraud with instant risk scoring.

Features

🔍 Multi-factor Analysis - Email, phone, SSN, address, device fingerprinting
⚡ Real-time Scoring - Risk scores from 0-100 in milliseconds
🎯 Risk Levels - Categorical levels: low, medium, high, critical
📊 Factor Breakdown - Detailed explanation of contributing risk factors
🔒 Privacy-first - PII masking and secure data handling

Quick Start via RapidAPI

Authentication is handled automatically by RapidAPI. Simply subscribe and use the generated code snippets.

1. Subscribe on RapidAPI

Subscribe on RapidAPI to get your X-RapidAPI-Key.

2. Make Your First Request

curl -X POST "https://synid-guard.p.rapidapi.com/synthetic-check" \
  -H "Content-Type: application/json" \
  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY" \
  -H "X-RapidAPI-Host: synid-guard.p.rapidapi.com" \
  -d '{
    "person": {
      "email": "test@example.com",
      "firstName": "John",
      "lastName": "Doe"
    }
  }'

That's it! No additional API keys required.

API Reference

Base URL

https://synid-guard.p.rapidapi.com

Authentication

Authentication is handled automatically by RapidAPI. Include these headers (auto-generated in RapidAPI code snippets):

Header	Description
`X-RapidAPI-Key`	Your RapidAPI subscription key
`X-RapidAPI-Host`	`synid-guard.p.rapidapi.com`

Endpoints

Method	Endpoint	Description
`POST`	`/synthetic-check`	Analyze identity for fraud risk
`GET`	`/health`	Health check (public, no auth required)

Request & Response Examples

Synthetic Check Request

{
  "person": {
    "firstName": "John",
    "lastName": "Doe",
    "dateOfBirth": "1990-05-15",
    "ssnLast4": "6789",
    "email": "john.doe@example.com",
    "phone": "+14155551234"
  },
  "address": {
    "line1": "123 Main St",
    "city": "San Francisco",
    "region": "CA",
    "postalCode": "94102",
    "country": "US"
  },
  "device": {
    "ip": "192.168.1.1",
    "userAgent": "Mozilla/5.0...",
    "deviceId": "abc123def456"
  },
  "context": {
    "useCase": "account-opening",
    "channel": "web"
  }
}

Successful Response

{
  "success": true,
  "riskScore": 35,
  "riskLevel": "medium",
  "factors": [
    "VoIP phone number detected",
    "Email domain is relatively new",
    "Device fingerprint information is missing"
  ],
  "meta": {
    "requestId": "sidg_abc123def456",
    "timestamp": "2026-01-21T10:30:00.000Z",
    "latencyMs": 145
  }
}

Health Check

curl "https://synid-guard.p.rapidapi.com/health"

Response:

{
  "status": "healthy",
  "service": "synid-guard",
  "version": "1.0.0",
  "timestamp": "2026-01-21T10:30:00Z"
}

Rate Limits

Plan	Requests/Day	Price
Basic	100	Free
Pro	5,000	$49.99/mo
Ultra	25,000	$199.99/mo
Mega	Custom	Contact Sales

Error Codes

Code	Description
`INVALID_JSON`	Invalid JSON in request body
`INVALID_REQUEST`	Request body missing required fields
`UNAUTHORIZED`	Authentication failed
`RATE_LIMIT_EXCEEDED`	Daily request limit exceeded
`METHOD_NOT_ALLOWED`	Only POST method is allowed
`INTERNAL_ERROR`	Server error, please retry

Use Cases

Account Opening - Screen new account applications
Credit Applications - Verify loan applicants
KYC/AML Compliance - Meet regulatory requirements
E-commerce - Prevent checkout fraud
Marketplaces - Verify seller identities

Resources

Enterprise Direct API Access

For enterprise customers requiring direct API access without RapidAPI, contact our sales team for custom integration options.

License

Commercial License - See Terms of Service