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: a new
Idempotency-Key header when sending events.March 28, 2025
New: a new
Idempotency-Key header when sending transactional emails.February 28, 2025
New: a new 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.