Using the web service API to search for publications in a conference series leads to incomplete results with a cut-off at 100 entries, whereas more results are shown via the ‘explore’ pages. Example:
https://researchr.org/api/search/publication/ICSE
vs.
https://researchr.org/conferenceseries/icse/publications

Submitted on 16 March 2021 at 14:17

The researchr API is paginated, so the initial API search indeed returns a maximum of 100 entries. Additional entries can be queried by adding an index to the URL:
Result 1-100: https://researchr.org/api/search/publication/KBSE (equivalent to https://researchr.org/api/search/publication/KBSE/0)
Result 101-200: https://researchr.org/api/search/publication/KBSE/1 etc.
I hope this answers your question!