Confession: I wasn’t always a fan of OpenAPI.
And in many ways, I’m still not its biggest cheerleader - But…
…in my mind, there’s no doubt that OpenAPI is the glue that makes building API Products easier, faster, and of higher quality.
Let me show you what you can achieve if you make OpenAPI the centerpiece of your API Lifecycle, especially now that we have LLMs and AI to generate it with:
1️⃣ GOVERNANCE
Put together your rules, standards, and security guidelines and automate checking your OpenAPI files with tools like Spectral, Vacuum, and 42Crunch.
2️⃣ PROTOTYPING
Once you have a valid, high-quality OpenAPI document, use Mockbin, Traefik’s mock server, or Wiremock to quickly generate a prototype for customer discovery.
3️⃣ API DESIGN
Get feedback from your prototype, and add it to your OpenAPI document, which serves as the design artifact for your API. Use an editor like Swagger or Scalar and think of it as the Figma for APIs. If API Governance is in place (see step 1), you’ll ensure the design is high-quality and consistent with your other APIs.
4️⃣ USER STORIES & PRDs
Directly reference OpenAPI in your PRDs, User Stories, and other product artifacts. You can automate for speed and accuracy by uploading OpenAPI to an LLM to generate outlines for these artifacts that match your organization’s needs (also give it example docs).
5️⃣ IMPLEMENTATION
Use OpenAPI with Codegen tools to build out the first version of an API server, complete with authentication and persistence. Replit works very well for this.
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6️⃣ TESTING
Automate testing to verify that what was implemented matches the OpenAPI document. You can use OpenAPI to generate tests with Postman, Pact, ReadyAPI, and various test generation frameworks.
Sadly, here we’re missing an easy-to-use, streamlined solution for OpenAPI 3.1.X, since all these involve generating tests you’ll need to maintain.
7️⃣ DOCUMENTATION
This has been one of the early uses of OpenAPI, and thankfully, many solutions exist. These allow you to build and host documents for yourself, including generating code snippets and interactive “try it out” functionality. Readme, Redocly, and SwaggerHub are mainstays, with Zuplo, Mintlify, Treblle, Scalar, Theneo, and Bump offering updated alternatives with AI enhancements.
8️⃣ SDK GENERATION
Native SDKs can be a lot of work to write and maintain. Automation is the way to go if you’d like to support many languages yet provide complete coverage for your API. APIMatic, Speakeasy, Fern, and Stainless support generating SDKs from OpenAPI.
9️⃣ DEPLOYMENT & SECURITY
API Management has traditionally been time-consuming to implement and maintain, but new API gateways follow AWS’s lead, allowing you to configure policies with OpenAPI. Zuplo is a good example of an OpenAPI-native API Management toolset. Other products to try: Azure, Kong, Tyk, KrakenD, and Traefik Labs.
🔟 MONITORING, ANALYTICS & OBSERVABILITY
Using OpenAPI to create monitors is quicker and more accurate than manual configuration. You can also use OpenAPI to tell your Product Analytics what to measure, how you’d like to bucket events, and what dashboards you want to see. Tools that support this: AlertSite, Checkly, Moesif, Postman, Treblle, Catchpoint, Zuplo, and Google Cloud Endpoints.
Make OpenAPI your source of truth for your APIs, check it into version control, and use it as declarative configuration with tools that support it!
And watch your entire product team’s delivery speed up - and user adoption skyrocket. 🚀
📲 If you want to know more about this, follow me. Then scroll up and hit “Visit my website” for free resources, videos, and courses on building great APIs with OpenAPI and AI tools.