liveBook · Manning

Api linting

As explained in The Design of Web APIs, Second Edition

API linting is the automated analysis of an API description or design for violations of quality, consistency, security, and maintainability rules.

API linting automatically analyzes an API description, typically an OpenAPI document, for design and authoring problems. It applies API design guidelines consistently, supporting user-friendliness, security, efficiency, extensibility, and maintainability while leaving consumer-focused design decisions to people. section 18.0 section 18.1

A linter can help teams:

  • Detect inconsistent property naming, missing pagination parameters, undefined security scopes, duplicated path parameters, and unclear inline schemas. section 18.1.1
  • Run checks in an IDE, OpenAPI editor, terminal, or CI/CD pipeline before avoidable errors become breaking changes. section 18.1.1
  • Reduce guideline memorization without replacing analysis of whether an API actually meets consumer needs. section 18.1.2

Checking a product search operation

A lint rule can flag a search operation that lacks pagination or uses inconsistent parameter names such as cursor versus next and pageSize versus limit. It can also catch a property such as Account when the guideline requires account, preventing a later breaking rename. section 18.0 section 18.1.1

Figure 18.1 We can use an API linter to apply our guidelines seamlessly. Linting can help us with API design and OpenAPI authoring.
figure

Use this overview to see how an API linter applies guidelines to both API design and OpenAPI authoring. section 18.1

How The Design of Web APIs, Second Edition covers it

How deep it goes
Covers practical rule automation and feedback, but stops short of judging whether designs meet consumer needs or broader API context.
Examples
Uses casing, pagination, security scopes, path parameters, request schemas, and search operations as concrete linting targets.
What it assumes
Assumes API design guidelines and an API definition, while explaining how to turn smaller guideline statements into rules.
What you can do after
Apply it via Spectral to automate, customize, share, document, and selectively ignore API guideline checks.
How it connects
Connects API design guidelines, OpenAPI, REST APIs, CI/CD, API governance, and alternative API description formats.

Also explained in

Compare how 2 books explain api linting →

Related concepts

This explainer was generated by Manning's knowledge graph from the text of The Design of Web APIs, Second Edition. The section links point to the parts of the book it draws on.