Specification
In the API world a specification is a machine-readable document that formally describes how an API behaves — its endpoints, operations, schemas, and contracts — so that humans and tooling can design, document, test, mock, and govern the API from a single shared source of truth.
Also known as Specifications, Spec, Specs.
Providers that carry Specification 30
These providers' own APIs.json profiles carry Specification 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
- The Volatile and Selfish API Specification Landscape 2026-07-16
- The Promise of a New Specification 2026-02-25
- What Is Your Beef With JSON Schema? 2026-02-09
- How This Moment Will Shake Out 2025-10-09
- Adopting MCP is a Bad Idea 2025-04-09
- Response to the API Repository Proposal 2025-04-03
Read from the API Evangelist standards directory. 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.