How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

openapi-format

Radar: Initial MIT

Formats, filters, sorts and applies Overlays to OpenAPI documents — the most complete Overlay implementation in the JavaScript ecosystem.

OpenAPI Overlay

Specifications it implements

What this tool does to each specification, in the role vocabulary. Follow a standard through to standards.apievangelist.com for what it actually specifies.

StandardRoleWhat that means
OpenAPI Overlay transforms
Using this from an agent
Interfaces
clilibrary
Install
npm openapi-format
Invoke
npx openapi-format <spec.yaml> -o <out.yaml> --overlayFile <overlay.yaml>
Consumes
openapi, openapi-overlay
Emits
openapi
Runtime
Runs offline Deterministic Writes No credentials

Where it applies

Jobs this tool actually does, and the surface each one is exercised on.

Apply an Overlay to a provider's description instead of forking and hand-editing it.
coding-agentci-pipeline

The pattern an agent should prefer whenever it needs to change a contract it does not own: the Overlay is a small reviewable file, and the base description stays upstream and updatable.

Strip internal or unreleased operations out of a description before publishing it.
ci-pipeline
Normalise ordering and formatting so contract diffs show real changes only.
ci-pipeline
Website
https://openapi-format.com
Repository
https://github.com/thim81/openapi-format
License
MIT — reported by the GitHub API, verified 2026-08-11
Stars
175 · last commit 2026-08-02
Reading this as an agent? Don't scrape the page — this entry is published as structured data at /tools.json, against the tool.schema.json schema, using the roles.json vocabulary. Start at /llms.txt.
arrow_back All tools by adoption