







Use Spectral rules to target API descriptions for quality improvement or enforce API Style Guide rules, such as naming conventions for OpenAPI models or prohibiting integers in URLs.
OpenAI Model Spec
The Model Spec specifies desired behavior for the models underlying OpenAI's products (including our APIs).

Prism | Open-Source HTTP Mock and Proxy Server | Stoplight
Accelerate API development with realistic mock servers powered by API descriptions.

opticdev/optic
OpenAPI linting, diffing and testing. Optic helps prevent breaking changes, publish accurate documentation and improve the design of your APIs.
The Best API Documentation Tool
OpenAPI-generated documentation tool with 24k+ stars on Github - make APIs your company's superpower.

ReadMe · Developer-friendly API documentation
ReadMe helps you create beautiful, interactive API documentation that developers love.
ReadMe · Developer-friendly API documentation
ReadMe helps you create beautiful, interactive API documentation that developers love.
ReadMe · Developer-friendly API documentation
ReadMe helps you create beautiful, interactive API documentation that developers love.
ReadMe · Developer-friendly API documentation
ReadMe helps you create beautiful, interactive API documentation that developers love.
ReadMe · Developer-friendly API documentation
ReadMe helps you create beautiful, interactive API documentation that developers love.
ReadMe · Developer-friendly API documentation
ReadMe helps you create beautiful, interactive API documentation that developers love.
ReadMe · Developer-friendly API documentation
ReadMe helps you create beautiful, interactive API documentation that developers love.
oracle/agent-spec
Open Agent Spec (Agent Spec) is a framework-agnostic declarative language for defining agentic systems. It defines building blocks for standalone agents and structured agentic workflows as well as common ways of composing them into multi-agent systems.
Summarizer - Web APIs | MDN
The Summarizer interface of the Summarizer API contains all the functionality for this API, including checking AI model availability, creating a new Summarizer instance, using it to generate a new summary, and more.

Tools for working with OpenAPI | OpenAPI.tools
A comprehensive and open source list of resources for developers working with OpenAPI.

OpenAI Codex with Ollama· Ollama Blog
Open models can be used with OpenAI's Codex CLI through Ollama. Codex can read, modify, and execute code in your working directory using models such as gpt-oss:20b, gpt-oss:120b, or other open-weight alternatives.
