Every API should have a unique identifier, known as an AID (API Identifier). The APIs.json file, contract, or collection contains its own AID, which the API uses as part of its reference. Additionally, the API applies a slugified version of its name, resulting in a unique, human-readable identifier for the API.
APIs.json APIs AID Error
Message: APIs MUST have an aid property.
Policies
Unique Identifiers for APIs
Providing unique identifiers for API apis, as well as the APIs that are indexed as part of an API, providing a key reference for discovery and automating around a contract.