# Transactional Email API connectors

Check each connector's setup and resource coverage before implementing. This API has no public OpenAPI reference yet; each connector page describes what it supports.

[Browse the connector catalog](https://developers.apideck.com/apis/transactional-email)

- [Gmail](https://developers.apideck.com/apis/transactional-email/gmail/overview.md)
- [Mailgun](https://developers.apideck.com/apis/transactional-email/mailgun.md)
- [Sendgrid](https://developers.apideck.com/apis/transactional-email/sendgrid.md)