Build anything with our REST API
Integrate SMASHSEND directly into your applications with our powerful REST API. Manage contacts, send transactional emails, create campaigns, and automate your entire email marketing workflow programmatically.
curl "https://smashsend.com/v1/contacts" \
-H "Authorization: Bearer sk_..." \
-H "Content-Type: application/json" \
-d '{
"email": "user@example.com",
"firstName": "John",
"lastName": "Doe"
}'What you can build
Contact Management
Create, update, and sync contacts from your CRM, database, or application in real-time.
Transactional Emails
Send password resets, receipts, notifications, and other triggered emails instantly.
Campaign Automation
Create and trigger email campaigns programmatically based on user actions.
Analytics & Reporting
Pull email performance data and contact insights into your own dashboards.
Custom Properties
Store and manage custom contact data that's specific to your business needs.
Webhook Integration
Receive real-time notifications when contacts engage with your emails.
Getting started is simple
1. Get your API key
Sign up for SMASHSEND and generate your API key from the dashboard in seconds.
2. Make your first request
Use our comprehensive API documentation to make your first API call.
3. Build your integration
Integrate email functionality directly into your application workflow.
Ready to start building?
Get started with SMASHSEND's powerful REST API and build custom email integrations for your applications.