>Make one /health/a endpoint and one /health/b endpoint. Client-service A uses /health/a to check if the service is "healthy in terms of A's ability to use it."

>Make one /health/a endpoint and one /health/b endpoint. Client-service A uses /health/a to check if the service is "healthy in terms of A's ability to use it." Client-service B likewise pings /health/b. I've done exactly this, and it worked well in my case were the # of related services was pretty small. Each endpoint would return an HTTP status code indicating overall health with additional details stating exactly which checks succeeded or not.