Build exactly what you need. Our REST API gives you full control over contacts, campaigns, and more.
What you get
Create, update, and query contacts programmatically. Manage custom fields and preferences via API.
Add contacts to your audience and automatically trigger drip sequences on sign-up.
Handle subscribe and unsubscribe actions, manage preference categories, and respect opt-outs.
Simple, secure authentication. Create API keys in your dashboard and use them as Bearer tokens.
Clean, consistent JSON responses with proper HTTP status codes and helpful error messages.
Combine API calls with incoming webhooks for powerful two-way integrations with any platform.
How it works
Generate an API key from the Setup page in your SplashSend dashboard.
Use any HTTP client to call our API endpoints. Start with listing your contacts.
Integrate SplashSend into your app, website, or internal tools however you need.
Full API documentation with examples for every endpoint.