PUT Request: ID in body or URI? https://stackoverflow.com/questions/27900041/rest-put-ids-in-body-or-not https://restfulapi.net/rest-put-vs-post/ https://softwareengineering.stackexchange.com/questions/263925/to-include-a-resource-id-in-the-payload-or-to-derive-from-uri In general: PUT should be idempotent and mirror behavior of GET
Sources https://stackoverflow.com/questions/39680082/can-i-prefix-with-dollar-sign-my-url-query-string-parameters-safely https://stackoverflow.com/questions/20050114/what-does-dollar-sign-do-in-url
https://stackoverflow.com/questions/10286204/what-is-the-right-json-date-format
Sources https://stackoverflow.com/questions/53340164/feignclient-converts-get-method-to-post https://stackoverflow.com/questions/53340164/feignclient-converts-get-method-to-post https://stackoverflow.com/questions/58468968/feign-client-get-request-throws-method-not-allowed-request-method-post-not Presence of requestbody automatically converts it to a POST