We want to know how to do a bulk call via API from ADS
If you mean "how to send multiple RICs subscriptions in a single request message", the EMA API has the Batch feature. A consumer can request multiple items using a single, client-based, request called a batch request. After the consumer sends an optimized batch request to the Refinitiv Real-Time Advanced Distribution Server, the Refinitiv Real-Time Advanced Distribution Server responds by sending the items as if they were opened individually so the items can be managed individually.
The client can find the Batch demonstration in the following EMA API examples: