ASP.NET Core Web API Interview Question #95

What are operation IDs in OpenAPI?

Routing, Versioning, OpenAPI/Swagger & API Documentation Mid-Level Intermediate

Quick Interview Answer

An operation ID is a unique identifier for an API operation within an OpenAPI document. Client generators may use operation IDs to create method names.

Detailed Explanation

An operation ID is a unique identifier for an API operation within an OpenAPI document. Client generators may use operation IDs to create method names.

Stable, meaningful operation IDs can improve generated SDK usability. They should be unique and should not change casually when external clients depend on generated code.

Code Example

// OpenAPI concept:
{
  "operationId": "GetProductById"
}

// A generated client might expose:
// client.GetProductByIdAsync(id)