Aggregate queries over fields are very helpful for building search pages

[seandavi]

Would be great to expose an aggregation endpoint.

[hniedner]

I second this request. It would be nice to have a dedicated operation to retrieve

• just the count of found trials for a set of search params,
• a list of unique/distinct values for a field, with or without additional filters

[futo82]

Thanks for the feedback. We have noted this request and will put it on our roadmap.