OpenAPI Specification

Zoho Mail provides an OpenAPI Specification (OAS) for its REST APIs, enabling developers to explore, integrate, and automate email operations.

The OpenAPI Specification, governed by the OpenAPI Initiative, is a widely accepted, language-agnostic standard for describing RESTful APIs. It allows both humans and machines to understand the capabilities of an API without needing access to the source code or additional documentation.

With this specification, Zoho Mail empowers developers and partners to:

• Generate interactive, auto-updated API documentation
• Create client SDKs in multiple programming languages
• Perform testing and mocking with tools like Swagger UI and Postman
• Accelerate third-party integration and onboarding

The Zoho Mail OpenAPI specification is available for download in JSON format here.