406 is returned by the server when it can't respond based on accepting the request headers (ie they have an accept header which states they only want xml). Statuscode 406 (not acceptable) in asp.net core asked 8 years, 6 months ago modified 3 years, 9 months ago viewed 29k times I create a mcp server by fastmcp, i can ensure that the mcp server has already finished the initialization, due to the server has already process several tool request, but i also.
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118 406 not acceptable the resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept. 55 406 not acceptable the resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to. 406 is meant for content negotiation, when the server cannot send a representation of a particular resource with the media type indicated in the accept header of.