How to get the status of the previous build using REST API

Question

The requirement is to check whether the previous build failed using REST API. How can this be achieved?

Answer

1. Get the current build's information by its ID: GET /app/rest/builds/4114
2. Get the current build's buildTypeId and number from the response: <build id="4114" buildTypeId="TcPythonTest_Dependent" number="9" status="SUCCESS" state="finished" branchName="main" defaultBranch="true" href="/app/rest/builds/id:4114" webUrl="...">
3. Use it to get the status of the previous build: GET /app/rest/builds/buildType:TcPythonTest_Dependent,number:8/status