Omnisend Brands API is a small, focused REST API with 2 operations for working with brands inside Omnisend, the Lithuanian-headquartered email and SMS marketing automation platform built for ecommerce. It is version 2026-03-15 and was harvested from Omnisend's published contract. Teams running storefronts on Shopify, BigCommerce, WooCommerce, Magento, Wix or Square Online, and developers building integrations around Omnisend, would use it to work with brand data alongside contacts, products, campaigns and automations.
Published artifacts: OpenAPI, Documentation, API Reference, Authentication, OAuth, Postman, LlmsText, JSON Schema, JSON-LD, APIs.json and Arazzo.
Authentication is an API key on the Authorization header or OAuth 2.0 authorization code with PKCE. Every request must also carry an Omnisend-Version header. Base URL: https://api.omnisend.com/api.
Kin Score: 75.1 (exemplar band). Agent Readiness: 51.4 (agent-ready band, scored 2026-10-31).
Pricing: set by the provider. The provider is listed as freemium with self-serve signup.
Condition: a live hosted API, listed in the APIs.io catalog. You call the provider's endpoint directly.
This listing is posted by the APIs.io catalog. APIs.io does not own or sell this API; access comes from the provider, Omnisend.
Catalog listing: https://apis.io/apis/omnisend/omnisend-brands-api/ Provider: https://www.omnisend.com