Reference

API accepts single reply-to addresses, Unix keep_until and one run ID

Template reply_to with a single address, suppression keep_until as a Unix timestamp or null, and automation stats with one run ID no longer fail validation.

Updated Oct 20, 2026

FixedREST API Templates Suppressions Automations

Create and update a template accept reply_to as one address or a one-item list. Before, both returned 400 “must match exactly one schema in oneOf”.
Create and update a suppression accept keep_until as a Unix timestamp, and null clears it on update.
Automation stats accepts a single run_ids[] value.

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