October 17, 2025
New: an
email.resubscribed webhook event for
when contacts resubscribe to your marketing email from an email’s
“Unsubscribe” link.October 13, 2025
New: an
optInStatus field from double opt-in in
the Find contact endpoint and in
contact.created webhook events.September 11, 2025
Improvement: all endpoints now return a
success and message field in the error response bodies.error and path top-level keys are now deprecated but will continue to be supported for some time for backwards compatibility.August 21, 2025
The docs have been updated to reflect that the
email parameter is optional
in the Update contact endpoint if a userId
is provided.May 23, 2025
Improvement: data variables are now optional in the Send transactional
email endpoint. Read
more
April 29, 2025
New: an
Idempotency-Key header when sending
events.March 28, 2025
New: an
Idempotency-Key header when sending transactional
emails.February 28, 2025
New: an endpoint for listing transactional
emails and their data variables.
January 14, 2025
New: new endpoints for creating contact properties and listing contact properties.Depcrecation: the List custom fields endpoint is now deprecated in favor of the new List contact properties endpoint.
December 18, 2024
New: we added
description to mailing list objects in the List mailing
lists endpoint.November 5, 2024
Improvement: the maximum payload size for the transactional endpoint has been
increased from 1MB to 4MB, allowing for more or larger attachments.
September 6, 2024
New: our new Nuxt module is now out!
August 15, 2024
New: we added an
isPublic attribute to mailing list objects in the List
mailing lists endpoint.June 28, 2024
New: there’s a new
addToAudience parameter in the Send transactional
email endpoint can add contacts to
your audience.June 18, 2024
New: support for our new mailing lists feature.You can now add contacts to and remove contacts from mailing lists in the Create contact, Update contact and Send event endpoints.There is also a new endpoint for retrieving your mailing lists.
April 18, 2024
New: you can now Find contacts by
userId.March 21, 2024
New: you can now include event properties in requests to
the Send event endpoint.
March 13, 2024
Improvement: we removed behavior that returned a
400 Bad Request response if
an unrecognized property was added to Contact endpoints.February 9, 2024
Improvement: sending in a payload that contains an unrecognized property will
now return a
400 Bad Request response.January 25, 2024
Clarification in the API docs that
userId can be used in a Send
event request.November 6, 2023
New: we added a new endpoint for querying custom contact
properties.
October 30, 2023
Our official JavaScript/TypeScript SDK is now available!
October 12, 2023
New: we now accept dates as a custom contact property
type. View the available formats.