What Makes a Good SDK: A Developer's Checklist

A good SDK gets out of the way and lets developers integrate quickly. Use this checklist to ship one that developers actually enjoy using.

Use the same patterns everywhere: naming (camelCase or snake_case, but not both), how you pass options (object vs positional args), and how you handle async (Promises, callbacks, or both—pick one as primary). Mirror your REST resources where it makes sense so the SDK feels like a direct map to your API.

Ship TypeScript types (or clear JSDoc). Developers rely on autocomplete and type errors to discover methods and avoid mistakes. Keep types in sync with your API; regenerate them from your spec if you have one.

Throw or return errors that include a code, message, and ideally a request/response id. Don’t swallow failures. Document common errors so developers know how to handle rate limits, auth failures, and validation errors.

Provide a short “Getting started” (install, auth, first request), an API reference (generated from types or OpenAPI), and at least one full example (e.g. “Create a widget and list widgets”). Real code beats long prose.

Follow semver. Avoid breaking changes in minor/patch releases. Deprecate before you remove; give developers time to migrate. A changelog helps integrators plan upgrades.

A test suite and a small sample app (e.g. a script or a minimal web app) build confidence. They also document expected usage.

If you want a production-ready SDK that ticks these boxes, Hendoi Technologies builds SDKs for B2B products in the USA, Canada, and Bengaluru. Get a free quote.

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