Whether the given Accept request-header value admits a text/event-stream
response. The standalone GET stream the MCP endpoint opens is always an SSE
stream, so a client whose Accept provably excludes that media type cannot
consume what the server would send. A media type is admitted by an exact
text/event-stream token, by the text/* subtype wildcard, or by the */*
full wildcard; quality and other parameters after a ; are ignored. An empty
value (no Accept header) is treated permissively as acceptable, since the
transport never required clients to send one. Only a header that names media
types and omits any matching one returns false.
Whether the given Accept request-header value admits a text/event-stream response. The standalone GET stream the MCP endpoint opens is always an SSE stream, so a client whose Accept provably excludes that media type cannot consume what the server would send. A media type is admitted by an exact text/event-stream token, by the text/* subtype wildcard, or by the */* full wildcard; quality and other parameters after a ; are ignored. An empty value (no Accept header) is treated permissively as acceptable, since the transport never required clients to send one. Only a header that names media types and omits any matching one returns false.