Email Validation API

# Validate with all features
curl -X GET "https://emailvalidatr.com/api/validate?email=user@example.com&includeDomainAuth=true" \
  -H "X-API-Key: your_api_key"

# Deep verification (SMTP check)
curl -X GET "https://emailvalidatr.com/api/validate?email=user@example.com&deep=true" \
  -H "X-API-Key: your_api_key"

# Batch validation
curl -X POST "https://emailvalidatr.com/api/validate/batch" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your_api_key" \
  -d '{"emails": ["user1@example.com", "user2@example.com"], "include_domain_auth": true}'

// Full validation with all features
const response = await fetch(
  'https://emailvalidatr.com/api/validate?email=user@example.com&includeDomainAuth=true',
  { headers: { 'X-API-Key': 'your_api_key' } }
);

const result = await response.json();

// Access quality indicators
console.log('Has Gravatar:', result.validations.quality_indicators?.has_gravatar);
console.log('Suspicious:', result.validations.quality_indicators?.suspicious_patterns?.is_suspicious);
console.log('Red Flags:', result.validations.quality_indicators?.suspicious_patterns?.red_flags);

// Access domain authentication
console.log('SPF Valid:', result.validations.domain_authentication?.spf?.is_valid);
console.log('DKIM Found:', result.validations.domain_authentication?.dkim?.exists);
console.log('DMARC Policy:', result.validations.domain_authentication?.dmarc?.policy);
console.log('Auth Score:', result.validations.domain_authentication?.authentication_score);

// Using EmailValidatr.Client NuGet package
using EmailValidatr.Client;

var client = new EmailValidatrClient("your_api_key");

// Full validation with domain auth
var result = await client.ValidateAsync("user@example.com", new ValidationOptions
{
    DeepVerification = true,
    IncludeDomainAuth = true
});

// Check quality indicators
Console.WriteLine($"Has Gravatar: {result.Validations.QualityIndicators?.HasGravatar}");
Console.WriteLine($"Suspicious: {result.Validations.QualityIndicators?.SuspiciousPatterns?.IsSuspicious}");

// Check domain authentication
var domainAuth = result.Validations.DomainAuthentication;
Console.WriteLine($"SPF Valid: {domainAuth?.Spf?.IsValid}");
Console.WriteLine($"Auth Score: {domainAuth?.AuthenticationScore}");

// Quick checks
bool isSuspicious = await client.IsSuspiciousAsync("spam123456@example.com");
bool? hasGravatar = await client.HasGravatarAsync("user@example.com");

# Check domain authentication only (SPF/DKIM/DMARC)
curl -X GET "https://emailvalidatr.com.com/api/domain-auth?domain=example.com" \
  -H "X-API-Key: your_api_key"

# With custom DKIM selectors
curl -X POST "https://emailvalidatr.com.com/api/domain-auth" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: your_api_key" \
  -d '{"domain": "example.com", "dkim_selectors": ["google", "selector1", "custom"]}'

# Response includes:
# - SPF: record, mechanisms, all_mechanism, warnings
# - DKIM: selectors_found, public key status
# - DMARC: policy, subdomain_policy, percentage, rua/ruf
# - authentication_score: 0-100 based on configuration