Built for operators who actually send
A sending API that just works.
Send transactional emails with a clean REST API. Webhook confirmations, template rendering, and full sending logs — built for developers who ship product, not email infrastructure.
Transactional email, without the headache.
Password resets, welcome sequences, order confirmations — your product needs to send email reliably. Senderkit gives you a simple REST endpoint that takes a recipient, a template, and your data. We handle the rest.
No SMTP configuration. No deliverability fire-drills. Just call the API and your email lands in the inbox.
Quick start
One request. That's it.
curl -X POST https://senderkit.io/api/v1/email \
-H "Authorization: Bearer sk_live_..." \
-H "Content-Type: application/json" \
-d '{
"to": "user@example.com",
"template": "welcome",
"data": {
"name": "Alex",
"login_url": "https://app.example.com/login"
}
}'Returns a message_id you can use to track delivery status via webhooks.
Developer tools
Everything you need to ship email in production.
REST API with Bearer auth
Simple, secure authentication. Generate API keys in the dashboard and start sending in minutes.
Template rendering
Reference templates by name and pass dynamic data. Your MJML templates render to responsive HTML automatically.
Webhook events
Get real-time delivery, bounce, and complaint notifications pushed to your endpoint.
Sending logs
Full audit trail of every send — recipient, template, status, and timestamps. Searchable in the dashboard.
Batch sending
Send to multiple recipients in a single API call. We handle rate limiting and retry logic for you.
Idempotency keys
Prevent duplicate sends with idempotency keys. Safe to retry on network errors without sending twice.
Multi-tenant from day one.
Every API key is scoped to a tenant. Data is isolated at the row level in Postgres, so there's no cross-contamination between accounts. Build your SaaS on top of Senderkit with confidence.
Rate limits, sending quotas, and template access are all tenant-aware. Your customers get their own sandbox, automatically.
Before you commit
Questions about developer-first
Yes — full REST API access on every plan, including free. Generate keys in App → Settings.
Ready when you are
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