{"source":"semconv","version":"1.44.0","attribute":{"id":"rpc.response.metadata","type":"template[string[]]","stability":"development","brief":"RPC response metadata, `<key>` being the normalized RPC metadata key (lowercase), the value being the metadata values.","note":"Instrumentations SHOULD require an explicit configuration of which metadata values are to be captured.\nIncluding all response metadata values can be a security risk - explicit configuration helps avoid leaking sensitive information.\n\nFor example, a property `my-custom-key` with value `[\"attribute_value\"]` SHOULD be recorded as\nthe `rpc.response.metadata.my-custom-key` attribute with value `[\"attribute_value\"]`","examples":["[\"attribute_value\"]"],"namespace":"rpc","definedIn":"model/rpc/registry.yaml","usedBy":[{"groupId":"span.rpc.connect_rpc.call.client","groupType":"span","requirementLevel":"opt_in"},{"groupId":"span.rpc.connect_rpc.call.server","groupType":"span","requirementLevel":"opt_in"},{"groupId":"span.rpc.dubbo.call.client","groupType":"span","requirementLevel":"opt_in"},{"groupId":"span.rpc.dubbo.call.server","groupType":"span","requirementLevel":"opt_in"},{"groupId":"span.rpc.grpc.call.client","groupType":"span","requirementLevel":"opt_in"},{"groupId":"span.rpc.grpc.call.server","groupType":"span","requirementLevel":"opt_in"}]},"history":[{"version":"1.39.0","publishedAt":"2026-01-12T22:11:41Z","kind":"first-seen","detail":"Added as development.","severity":"informational"}],"replaces":["rpc.connect_rpc.response.metadata","rpc.grpc.response.metadata"]}