Developer docs
Everything you need to integrate Grosend into your app.
Quick Start
Send your first email in under 2 minutes with our REST API.
API Reference
Complete REST API documentation for emails, domains, templates, and more.
SMTP Relay
Connect any app via standard SMTP on port 465 (SSL) or 587 (TLS).
Webhooks
HMAC-signed webhook payloads for deliveries, bounces, opens, and clicks.
Authentication
API key management, scoped permissions, and 2FA setup.
Tracking
Open pixel tracking, click redirect tracking, and event timelines.
Templates
Build responsive emails with our visual editor or raw HTML.
Domains
Verify sending domains, manage SPF, DKIM, and DMARC records.
Send your first email
Get up and running in under 2 minutes. Sign up, grab your API key, and send.
# Install the SDK
npm install @sendvanta/sdk
# Or use curl
curl -X POST https://api.grosend.com/v1/emails \
-H "Authorization: Bearer sv_live_your_api_key" \
-H "Content-Type: application/json" \
-d '{
"from": "hello@yourapp.com",
"to": "user@example.com",
"subject": "Welcome!",
"html": "<h1>Welcome aboard</h1>"
}'SMTP Relay
Connect any application via standard SMTP. No code changes needed.
Webhooks & Events
Real-time notifications for every email event with HMAC-verified payloads.
{
"event": "delivered",
"email_id": "8715af41-186b-4983-a625-bcd1e405605b",
"from": "hello@yourapp.com",
"to": ["user@example.com"],
"subject": "Welcome!",
"timestamp": "2026-06-26T14:56:09.795Z",
"message_id": "<b04bc4de-b81e-5129-30f0-fb66d76814ec@yourapp.com>"
}