All the API calls should be made under the base path https://api.as2gateway.com/v1.
HTTP requests will be automatically redirected to HTTPS with a HTTP 307 response.
v1 API is protected with token-based authentication,
dependent on a predefined data model,
and supports the following operations:
send (enqueue) messages
get (retrieve) individual messages, and mark them as read
download message attachments and MDN payloads
control retry behavior for queued messages