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Easily integrate your application with MailUp using our new REST API. Many of the tasks that can be performed in the MailUp admin console can now be executed also through the REST API, giving you remote and flexible access to many of MailUp's great features.

titleEmail campaigns vs. Transactional Emails

Please note that the REST API is not designed for sending transactional emails. You can easily send transactional emails through your MailUp account by leveraging MailUp's built-in SMTP relay system, at no extra charge.


Quick Reference
  • Getting started
  • How it works
  • Samples
    Direct Access
  • Endpoints
  • RESTful API v1.0
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    Getting started

    1. Read our best practices to understand what you can do and learn the recommended approaches.

    2. Download Demo Client and choose among several available programming languages.

    3. Test Resource Access with your MailUp account. Don't have one? Request a developer account.

    4. After getting acquainted with the API, get your API keys & build your own application.

    Integrating your application

    A few things to keep in mind:

    • The MailUp REST API uses Oauth2 and requires a token refresh. You can use the available samples to see how to refresh the authorization token

    • By properly setting the request header you can set the response format as JSON or XML

    • Each application is tied to a set of application keys, which are used to authorize the application (get yours).

    • Users of the application will be authenticated using their own MailUp account credentials.
    • The application keys used in the sample code shall not be used in a production environment.

    titleGetting stuck while developing your application?

    Take another look at the "Getting Started" section: the demo client can help a lot. Also, before contacting us, please consider that most of the questions that we receive are about...

    • Authorization (application keys) vs. authentication (MailUp account credentials): see Authenticating with OAuth v2.

    • Expired tokens: the token has to be refreshed, please use the available samples as guidelines.

    • Wrong credentials (e.g. trying to access to your production account with the credentials of your developer account, or viceversa).

    • Unexpected behavior of an API call due to unchecked error codes that were returned by previous API calls.

    • Developers that are unfamiliar with MailUp terminology (Resource Access section and related links should be helpful).

    A complete email messaging API

    When to use the MailUp REST APIThe MailUp REST API gives you access to a variety of methods to manage email campaigns, subscribe and unsubscribe recipients, and retrieving statistics, bounces, etc. 

    Recipient management

    Message management

    Campaign management

    Statistics retrieval

    Account provisioning

    Import recipients, get import status

    Retrieve lists, groups, email messages, etc.

    Subscribe, unsubscribe, update recipients

    Create and modify groups

    ...See Manage Lists and Groups and Recipients

    Create, modify, delete a message

    Create a message from a template

    Retrieve a list of messages

    Add and remove images

    ...See Email messages

    Send a message to a List

    Send a message to a Group

    Send a message to a Recipient

    ...  See Send Email Messages

    and also Transactional Emails

    Retrieve details on sent messages 

    Retrieve opens, clicks, bounces, unsubscribes

    Retrieve stats for the last N hours

    Retrieve stats for a specific period

    ...See Email Statistics

    Request new free trial account

    Obtain request status

    ...See Accounts


    Before choosing the REST API as the technical solution for integrating your application, ensure that you have read our best practices.