Utility Libraries

Beyond the three main libraries (openapi-backend, openapi-client-axios, openapicmd), the openapi-stack project maintains a set of small, focused utility libraries. They power the rest of the stack internally and are also used directly by teams at GitHub, SAP, Prisma, Zitadel, Mojaloop and many others.

Library	What it does	Weekly downloads
dereference-json-schema	Fast, in-memory dereferencing of $ref pointers in OpenAPI / JSON Schema documents.	~240k
mock-json-schema	Generate mock objects from JSON Schema definitions or OpenAPI examples.	~70k
glob-json-path	Glob-style matching for JSON paths. Pull a slice out of a deeply nested object by pattern.	~5k

All three are MIT-licensed, framework-agnostic, and ship with TypeScript types out of the box.