Monstache cannot connect to Amazon OpenSearch Serverless

[masei1]

Hello,

I'm trying to connect Monstache to Amazon OpenSearch Serverless, but Monstache fails during startup with the following error:

Unable to create Elasticsearch client: health check timeout: no Elasticsearch node available

OpenSearch Serverless does not expose cluster/node APIs, so it behaves differently from traditional OpenSearch clusters.
Even with health checks disabled, Monstache still fails with no Elasticsearch node available.

Is Amazon OpenSearch Serverless supported by Monstache, or is there a recommended configuration to connect to it?

Thanks!