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A Map of API Testing Tools: Choosing Between curl, .http Files, Postman, Bruno and OpenAPI UIs

The real question when choosing a tool is where the request definitions live: .http files and Bruno collections in the repo change in the same pull request as the API code, while a cloud collection falls behind. We add login and JWT to Bookstore.Api, run the shared scenario with curl, put the Bearer scheme into the OpenAPI document, and compare Scalar's role, Postman's single-user free plan since March 2026 and Bruno's editions.