Hi Jatin,
This is Varsha from Mixpanel Support!
1. To answer your first question, it's currently not possible to directly fetch all distinct_ids for a user profile within Mixpanel through libraries, JQL, or the API.
However, there is an undocumented endpoint with the Query API /engage, which we call the aliases endpoint, that can retrieve the distinct_ids in a cluster (programmatically). Please note that this endpoint can only query one alias/distinct_id at a time and is subject to the rate limits with the Query API.
Essentially you pass in any ID tied to the user in the 'distinct_id' parameter and the response will return all other IDs tied to that distinct ID. Here's an example curl request: ```
curl --request POST \
--url 'https://mixpanel.com/api/2.0/engage/aliases?project_id=YOURPROJECTID' \
--header 'Accept: application/json' \
--header 'Authorization: Basic BASE_64_ENCODED_API_SECRET' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data distinct_id=YOURDISTINCTID
2. For your second question, when you query the API /engage, it only returns the [canonical (main) distinct_id](https://docs.mixpanel.com/docs/tracking-methods/id-management/identifying-users-original#faq) for a user. The canonical distinct_id is chosen in a non-deterministic manner and you are not able to choose which distinct_id you've sent in the past is considered the canonical distinct_id.
Let me know if this makes sense. I hope this answered your questions!
Best,
Varsha
