Api key (http_api_key)
API keys are used to authenticate requests to the Elastic Cloud Serverless REST API. Generate your secret API key in https://cloud.elastic.co/account/keys You must provide the API key for all API requests in the Authorization header as follows:
"Authorization: ApiKey $API_KEY"
For example, if you interact with the API using the curl command:
curl -H "Authorization: ApiKey essu_..." https://api.elastic-cloud.com/api/v1/serverless/projects/elasticsearch