Developers
Developer docs
Build against Mailmundo: transactional sends, contact import, webhook event subscriptions. Trilingual support for recipient-facing strings (EN/PT/ES).
API reference
Interactive OpenAPI 3.1 spec for every public endpoint — send, contacts, lists, segments, suppressions.
/docs/api →
Webhooks
Event catalog (email.opened, email.clicked, contact.confirmed, …), HMAC signing, sample payloads, retry semantics.
/docs/webhooks →
OpenAPI spec
Machine-readable OpenAPI 3.1 — pull into Postman, Insomnia, or your favorite codegen.
openapi.json