Predefined conditions that a product, feature, or user story must meet to be considered complete and acceptable by stakeholders. These criteria establish clear, testable requirements that guide development and validate when work is done.
Acceptance Criteria
Acceptance Criteria are the predefined, testable conditions a feature or user story must satisfy before a team agrees the work is actually finished. They translate a vague requirement into an explicit checklist that developers, testers, and stakeholders can all read the same way, and they are the backbone of the closely related Definition of Done. In an API practice, they are where “we shipped an endpoint” becomes “we shipped an endpoint that returns the right status codes, enforces the right auth, and matches the contract.”
- Testable and unambiguous - Each criterion is written so it can be objectively verified as met or not met, with no room for interpretation.
- Stakeholder-owned - They capture what the business, not just engineering, considers acceptable, keeping delivery aligned with intent.
- Bound to the story - They travel with a specific user story or feature rather than living as generic, project-wide rules.
- The gate for “done” - Aggregated across stories, they become a Definition of Done that governs when work can be released.
In real API operations, acceptance criteria are where governance meets delivery. A well-written set often maps directly onto machine-checkable expectations — the response schema in an OpenAPI contract, required authentication, error handling, rate-limit behavior, and documentation coverage — so the same conditions that a product owner signs off on can be enforced in CI and in contract tests. As teams move toward agent-driven pipelines, clear acceptance criteria become the shared, explicit target that both humans and automated tooling verify against before an API change goes live.
