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