Explore an API from the code that actually uses it

Start at a real call site

Find the feature that depends on the API and trace its request path. Identify the client wrapper, configuration source, request construction, and response mapping. That route is more informative than reading an unfamiliar SDK from top to bottom.

Use type information as a guide to expected structure. Visual Studio Code’s IntelliSense documentation describes completion, parameter information, and quick information supported by language services. These features can help you inspect a client, but installed types still need to match the library and API version you use.

Compare code with the contract

• Arguments: Which values are required, defaulted, or omitted?
• Environment: Where are the base URL and credentials selected?
• Responses: Which fields are assumed to exist, and how are optional values handled?
• Errors: Where do timeouts, denied requests, and invalid data reach the user?

Search for related call sites before changing a shared client. One wrapper may support several features with different assumptions. A change that fixes an empty list in one place could alter behavior elsewhere.

Observe one request end to end

Use an approved development environment and controlled data. Place a breakpoint or add temporary diagnostic output around the narrow boundary you need to understand. Inspect the constructed request and the resulting application state without printing secrets or unnecessary private content.

Reproduce the smallest case that demonstrates the problem. If the endpoint responds successfully but the interface fails, examine parsing and mapping. If the request never reaches the provider, inspect configuration and client behavior before rewriting application logic.

After the change, review the diff and run the check that addresses the original issue. Remove temporary diagnostics and record any important contract assumption near the implementation. Keep a useful source link so the next developer can verify it.

A coding assistant can help navigate and propose changes, but the maintained reference, actual code, and observed result should drive acceptance.

The Cursor workflow guide explains how to supply durable project context. Use API QA planning to decide which verification provides meaningful evidence.