All RPC interfaces for a given node (see rpc_interfaces) currently support HTTP/1.1. A specific RPC interface can also support HTTP/2 by setting the
"app_protocol" configuration entry to
"HTTP2" for that interface.
HTTP/2 interfaces do not currently support client requests forwarding. Client requests that require forwarding to the primary node will return a 501 HTTP error.
Operators can cap the size of client HTTP requests (body and header) for each RPC interface in the http_configuration configuration section. These configuration entries are optional and have sensible default values.