Engineer-first APIs for GTM engineers who need to automate revenue workflows. Stop choosing between UI-first tools (limited control) and build-it-yourself (too slow). Get enterprise-grade accuracy with full programmatic control.
{
"email": "matt@company.com",
"result": "valid",
"is_role_based": false,
"b2b_outbound_quality": "high",
"credits_charged": 1,
"charge_reason": "Verified personal email"
}Unlike UI-first tools built for managers, GTMAPIs provides the infrastructure layer GTM engineers need to build systems that scale
RESTful APIs designed for GTM engineers who build automated systems
Connect to your existing GTM stack with enterprise-grade reliability
Engineer-first docs with code examples in every major language
Sub-100ms validation that scales with your automation workflows
Enterprise-grade accuracy with transparent quality scoring
Transparent pricing with full programmatic control over your GTM data
GTM engineers choose GTMAPIs because we provide the infrastructure layer they need—not a UI they have to click through
Connect GTMAPIs to your existing GTM workflows in minutes with our REST API or native integrations
// Python example
import gtmapis
client = gtmapis.Client(api_key=os.getenv('GTMAPIS_KEY'))
# Validate a single email
result = client.validate_email('matt@company.com')
print(result.is_valid) # TrueBuild automated workflows that process thousands of emails per hour with batch endpoints and webhooks
// Batch validation response = client.validate_batch([ 'user1@company.com', 'user2@company.com', 'info@company.com' # Detected as role-based ]) valid_emails = [r for r in response if r.is_valid]
Get enterprise-grade accuracy with 4-layer validation (Syntax, DNS, SMTP, Catch-all) and confidence scores
// Response with confidence
{
"email": "matt@company.com",
"is_valid": true,
"confidence_score": 0.95,
"validation_layers": {
"syntax": "pass",
"dns": "pass",
"smtp": "pass",
"catchall": false
}
}Monitor usage, set custom rate limits, and export all data—no vendor lock-in, full programmatic control
// Granular analytics analytics = client.get_usage_analytics( start_date='2025-01-01', group_by='endpoint' ) # Export all validation history history = client.export_validation_history() # Full data ownership - download anytime
No vendor lock-in. Export all data anytime. Cancel instantly. Built for GTM engineers who need full control.
5,000 API calls
Perfect for prototyping
50,000 API calls
For production GTM workflows
Unlimited API calls
For high-volume GTM automation
All plans include: Full API access • Technical documentation • Export all data • No vendor lock-in
Simple REST API with comprehensive documentation and code examples
Validate a single email address and get instant results with detailed quality scoring
curl -X POST https://api.gtmapis.com/v1/validate \
-H "Content-Type: application/json" \
-H "X-API-Key: your_api_key" \
-d '{
"email": "matt@company.com"
}'Validate up to 100 emails in a single request for efficient batch processing
curl -X POST https://api.gtmapis.com/v1/validate/bulk \
-H "Content-Type: application/json" \
-H "X-API-Key: your_api_key" \
-d '{
"emails": [
"user1@company.com",
"user2@company.com",
"info@company.com"
]
}'Detailed validation results with B2B quality scoring and transparent pricing
{
"email": "matt@company.com",
"result": "valid",
"is_role_based": false,
"b2b_outbound_quality": "high",
"credits_charged": 1,
"charge_reason": "Verified personal email - high value for B2B outreach",
"catchall_analysis": {
"is_likely_valid": false,
"confidence": 0.55,
"pattern_score": 0.9,
"role_based_score": 0.1,
"name_validity_score": 0.8,
"details": "Pattern matches typical real email format"
},
"validation_time_ms": 45
}Lightning Fast
Sub-100ms cached validations
Cost Effective
Only pay for high-value personal emails
B2B Focused
Built for outbound teams sending 50k+ emails/month
Reliable
99.9% uptime SLA with redundant infrastructure