What is a benefit of having an API specification?

Having an API specification offers the advantage of saving time by identifying design flaws before coding begins. This early detection is crucial because it allows developers and stakeholders to review the intended functionality and structure of the API, leading to straightforward adjustments and refinements based on feedback. By outlining endpoints, request/response formats, and expected behaviors, an API specification helps ensure that all parties have a clear understanding of the API's design and use cases. This proactive approach prevents costly revisions during later stages of development, ultimately streamlining the workflow and enhancing overall efficiency.

The other options touch on various aspects of API development but do not capture the primary benefit of having a specification. While documentation is essential, an API specification does not eliminate the need for documentation entirely, as additional context and details may still be required. The promise of guaranteed error-free execution is unrealistic, as successful API execution can depend on several factors, including proper implementation and usage. Finally, while specifications might suggest certain security considerations, they do not enforce strict security protocols; rather, real enforcement would occur through other means, such as proper development practices and security policies.