# Send API v3.1

Send API v3.1 has been released in August 2017 bringing new functionalities, better error reporting and top-notch developer experience. Mailjet is still supporting Send API V3.

If you are a current user of Send API in version 3, we listed the changes you will need to take into account to migrate to v3.1.

Read [this blogpost](https://www.mailjet.com/blog/news/meet-our-brand-new-send-api/) to learn more on how we designed our Send API V3.1 and where our Transactional Suite is going to.