Omnisend API · Endpoint removal
API v5 stops working
Stops working (in 250 days)
On June 30, 2027, the Omnisend API will shut down its v5 version. All requests to /v5/* endpoints will fail after this date. The provider has deprecated this version and scheduled it for sunset.
What to use instead of these calls
Migrate your calls to the v2026-03-15 API. This transition requires using the base path api.omnisend.com/api/ for contacts, products, categories, batches, and events, alongside an Authorization header with your key and an Omnisend-Version header set to 2026-03-15 on every request.
Calls it hits
/v5/*
The v5 API is deprecated and will be sunset on June 30, 2027 .
Facts
- API
- Omnisend API
api.omnisend.com - Kind
- Endpoint removal
- Takes effect
- June 30, 2027
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
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