While using POST request in POSTMAN ,this type of error may be raised. And GET request may function properly. The error in POST request can be resolved by following methods: Make sure API is correct. Set the key/pair values of the request’s HTTP Headers to “User-Agent : Mozilla/5.0” in the posting tool. The Suitelet will… Continue reading Resolve Error: “HTTP 405 Method Not Allowed” in Suitelets using POSTMAN