Using OpenAPI Links to Chain an API Response Into the Next Request

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OpenAPI links allow a contract to declare that a value returned by one operation should feed into a later request, turning separate endpoints into a described workflow. A link maps a returned field, such as an identifier, into a parameter or body of the target operation using a runtime expression that the client evaluates. This lets generated clients expose follow-style methods so developers need not remember exact field names. Compared with hand-written extraction logic, links are discoverable and checked at build time, while in-body hypermedia URLs remain useful for clients that do not generate code. The article recommends stable operationIds, descriptions on each link, and links limited to the main documented path, and it suggests using links to drive end-to-end tests that catch broken expressions in CI.

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