LogoSimply SendDOCS
    API Reference

    API Reference

    HTTP API reference for sending email, managing domains, contacts, templates, and webhooks with Simply Send.

    How to use this reference

    Use the sidebar to browse endpoints by resource. Each page documents request parameters, response shapes, and examples. Start with Authentication, then open the endpoint that matches what you need to call.

    Suggested path

    1. Authenticate — create API keys and learn the required request headers.
    2. Verify a domain — use Domains endpoints (or the dashboard) before sending in production.
    3. Send email — Transactional for system messages, Marketing for campaigns and list-based sends.
    4. Manage data — Contacts, subscription groups, templates, and compliance templates as needed.
    5. Observe events — configure Webhooks for delivery, engagement, and inbound notifications.

    Finding an endpoint

    Open a resource in the left navigation, or use docs search from the header. The API surface evolves over time, so the sidebar is always the source of truth for available endpoints.