OpenAPI Overlay Specification
The Overlay Specification is an auxiliary standard that complements the OpenAPI Specification. An OpenAPI description defines API operations, data structures, and metadata—the overall shape of an API. An Overlay lists a series of repeatable changes to apply to a given OpenAPI description, enabling transformations as part of your API workflows.
Also known as OpenAPI Overlay Specification, Overlay Specification, Overlays.
Providers that carry OpenAPI Overlays 3
These providers' own APIs.json profiles carry OpenAPI Overlays as a tag — the provider's statement that the standard is part of what it does. APIs.io has not verified the implementation on this page; the de facto profiles on this site are where that measurement exists. Ordered by Kin Score.
Reading
- What Are the Application and Interface Specification Priorities? 2026-01-06
- The Many Use Cases for OpenAPI Overlays 2026-06-26
- OpenAPI Overlays Tooling Support Across Open-Source and Commercial Services 2026-06-25
- OpenAPI Overlays Let One Products API Speak Four Languages 2026-06-23
- OpenAPI Overlays for Visual Authoring Without Hand-Writing JSONPath 2026-07-24
- API Evangelist Conversation with Lorna Mitchell About OpenAPI Overlays 2024-12-05
Read from the API Evangelist standards directory, facts verified 2026-08-17. Provider links come from the catalog's own identity tags and are rebuilt nightly. If this page is wrong about a standard or a provider, say so.