Using Python with the updated Gmail API only returns email IDs. Is there a single-call method to fetch complete email details? My solution:
groupOp = GroupRequest()
for identifier in id_list:
groupOp.add(apiClient.emails().retrieve(user='me', id=identifier), responseHandler)
groupOp.run()
After investigating similar challenges and experimenting with the new Gmail API, I can confirm that there is currently no native single-call mechanism to retrieve full email details in bulk. Instead, batching multiple requests into a single HTTP call remains the practical workaround. In my previous projects, I used the batch request functionality to combine individual retrieval calls, which allowed better control over the responses despite the extra orchestration. This approach may appear less straightforward but is the best available solution at this time.