Developer changelog

Breaking changes, deprecations, and migration guides for the Meridian API and SDKs.

Breaking changes

VersionDateChangeMigration
v3.2.02026-06-01Dropped /api/v2/auth; use /api/v3/sessionGuide →
v3.1.02026-04-15Webhook payload shape changed — `user.id` is now `user.sub`Guide →
v3.0.02026-02-01Removed XML response format; JSON onlyGuide →

Deprecation calendar

FeatureSunset dateReplacement
/api/v2/*2026-09-01/api/v3/*
license.verify() sync2026-08-01license.verifyAsync()
HMAC-SHA1 signatures2026-07-15HMAC-SHA256
All migration guidesAPI reference