Hi !
Is there a specific response for requests that exceeded the rate limit of 250 calls per min or any other specific behavior like delay ?
@amirande, you will get a Status Code: 429 Too Many Requests (a standard HTTP Status Code, https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/429) if you have exceeded the 250 API calls limit per min.
You can see the status code in https://status.onemap.sg and https://developers.onemap.sg/swagger.