Developer documentation

Quickstart

Create an account, generate an API key, and send your first transactional email in under five minutes.

• Email API reference →
• Authentication guide →

Core concepts

OnePush organizes messaging around channels (email, social, forms), campaigns, and events. Every send produces webhook events you can consume in your application.

• Unified campaigns →
• Webhooks and events →

SDKs and examples

Use the REST API directly or follow language specific examples for Node.js, Python, PHP, and curl. SMTP relay is available for apps that already speak SMTP.

curl -X POST https://api.onepush.app/v1/emails \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"to":"user@example.com","subject":"Hello","html":"<p>Welcome</p>"}'

• API reference →
• Blog tutorials →

Going to production

Verify your sending domain, configure SPF/DKIM/DMARC, set up webhook endpoints, and enable bounce handling before you scale.

• Email API →
• GDPR compliance →
• Contact support →