As the software application world moves from monolith architectures to microservices, we are also seeing a shift toward developing modular and reusable APIs. According to APIOps, reusable APIs are consumable APIs, which means they must be well-documented and compliant. The separation between the designers, builders, and consumers of an API grows larger and larger, making the API specification even more central to that API’s success.
The API spec is a contract. It is a promise that an API will function in a certain way.