Transactional Email API

Email your users can count on — and that lands in the inbox

Send transactional and marketing email through a fast REST API or SMTP relay. Domain authentication, dynamic templates, and real-time analytics come standard.

Get startedView pricing

Developer-first

One request to a reliable inbox

Send a fully templated, authenticated email with a single API call. Or point your existing SMTP client at our relay — whatever fits your stack.

  • REST API or standard SMTP relay
  • Attachments, CC/BCC & custom headers
  • Scheduled & batch sending
send-email.sh
curl https://api.lycatechnologies.com/v1/email/send \
  -H "Authorization: Bearer $LYCA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "receipts@yourbrand.pk",
    "to": "customer@example.com",
    "template": "invoice",
    "variables": { "amount": "PKR 4,500", "invoice": "INV-2048" }
  }'

Capabilities

A complete email platform, API-first

From authentication to analytics, everything you need to run production email is included — no extra add-ons to piece together.

REST API & SMTP relay

Integrate however you like — a modern REST API for new apps, or drop-in SMTP for existing systems. No rewrites required.

Authentication done right

SPF, DKIM, and DMARC set up per sending domain to maximize inbox placement and protect your brand from spoofing.

Dynamic templates

Design reusable templates with merge tags and conditional blocks. Update content without shipping code.

Engagement analytics

Track opens, clicks, bounces, and complaints in real time, with per-message event logs you can export.

Event webhooks

Delivery, bounce, open, and click events delivered to your endpoint so your app always knows what happened.

Deliverability at scale

Managed IP reputation, automatic bounce & complaint handling, and suppression lists keep your sender score healthy.

Use cases

Every email your product needs to send

Transactional or marketing, one-off or high-volume — Lyca handles the delivery so your messages arrive on time.

  • Password resets & magic links
  • Order receipts & invoices
  • Account & security notifications
  • Welcome & onboarding series
  • Shipping & delivery updates
  • Product & marketing newsletters

Ready to send better email?

Authenticate your domain and send your first email in minutes.

Get started