I have created an Endpoint using the @Rest Resource(urlmapping='') followed by apex class having a method as HTTP POST which returns a string when the endpoint is called...i have called this endpoint from other org ..then i am getting error as 404 i.e. not found. please can you explain where i am going wrong and help me to create the endpoint without oAuth.
Im not sure whats inside your URL mapping. Assuming it as a randomtext like "callmyservice" - your class has the below text at the top :
Considering your server instance as na8 he end point will be something like : https://na8.salesforce.com/services/apexrest/callmyservice”.
Hope this helps!