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OpenAPI Initiative Overlay and Arazzo

Exchange Schema API Specification openly published

Please see the Learn OpenAPI site for additional documentation and examples , and the OpenAPI Tooling site for community-provided lists of tools implementing the specifications....

OpenAPI Initiative / Linux Foundation, from their own opening paragraph

Also in the API standards catalog

This standard shows up on both sides of the house — as a data model here, and as a standard applied in API operations. Same standard, two lenses.

See it as an API standard →
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Model Details
Steward OpenAPI Initiative / Linux Foundation
Origin International United States
Layer Exchange Schema
Domain API Specification
Status live
Access Openly published
Go to the steward →
How I know this

Compiled for the API Evangelist data model catalog, then confirmed against the steward's own site.

Confirmed 2026-08-11

Evidence: name evidence 4/4. Found something wrong? Tell me — corrections are cheap and I would rather be right.

Modernity Profile
77.4 Current
Access Open
Licence Apache-2.0
Assessed 93.0% of the rubric

A separate measure from the Kin Score, which rates API providers. This rates how current a standard is in how it is expressed, published and paid for — not how good it is. EDIFACT and X12 score low here and move an enormous share of world trade.
Licence evidence: OpenAPI Initiative specifications are Apache-2.0.

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