Start here
Quickstart
Create an API key, send your first email, and view the timeline.
Set up deliverability
Verify your sending domain and enable delivery signals.
Send transactional emails
Use the v1 API with idempotency and per‑minute rate limits.
Use the API
API introduction
Base URL, authentication, idempotency, rate limits, errors.
Send an email
POST /api/v1/emails/send with examples in cURL, Node, Python.
Preferences
Read/update category subscriptions and one‑click unsubscribe.
Timeline
Inspect send, messages, and normalized events.
Operate
Monitoring & Events
Provider events and tracking are managed; verify outcomes.
Billing & usage
Understand monthly usage and per‑key limits.
Migration checklist
Move from another provider with minimal downtime.