Crepe

Uses familiar constructs like `let`, `param`, and namespaces to define APIs cleanly, as shown in the GitHub Gist example, making code readable and maintainable for developers accustomed to RSpec.

Built as Rack applications, ensuring seamless integration with Ruby web servers and middleware, which is a standard in Ruby web development for flexibility and deployment.

Supports regex-based constraints directly in route definitions, such as `param(sha: /\h{40}/)`, enabling precise validation without extra boilerplate code.

Provides `rescue_from` blocks to manage exceptions uniformly, allowing custom error responses like `error! :not_found` for better API consistency.