Semantic Conventions for JSON-RPC

Status: Experimental

The Semantic Conventions for JSON-RPC extend and override the RPC spans and RPC metrics Semantic Conventions that describe common RPC operations attributes in addition to the Semantic Conventions described on this page.

JSON-RPC Attributes

rpc.system MUST be set to "jsonrpc".

Attribute	Type	Description	Examples	Requirement Level	Stability
rpc.method	string	The name of the (logical) method being called, must be equal to the $method part in the span name. [1]	exampleMethod	Required
rpc.jsonrpc.error_code	int	error.code property of response if it is an error response.	-32700; 100	Conditionally Required If response is not successful.
rpc.jsonrpc.version	string	Protocol version as in jsonrpc property of request/response. Since JSON-RPC 1.0 doesn’t specify this, the value can be omitted.	2.0; 1.0	Conditionally Required If other than the default version (1.0)
rpc.jsonrpc.error_message	string	error.message property of response if it is an error response.	Parse error; User already exists	Recommended
rpc.jsonrpc.request_id	string	id property of request or response. Since protocol allows id to be int, string, null or missing (for notifications), value is expected to be cast to string for simplicity. Use empty string in case of null value. Omit entirely if this is a notification.	10; request-7; ``	Recommended

[1]: This is always required for jsonrpc. See the note in the general RPC conventions for more information.