Struct LoggingMessageNotificationParams 

pub struct LoggingMessageNotificationParams {
    pub level: LoggingLevel,
    pub logger: Option<String>,
    pub data: Value,
    pub meta: Option<HashMap<String, Value>>,
}

👎Deprecated since 0.4.0:

Deprecated per SEP-2577 (2026-07-28). Replacement: log to stderr for stdio transports or use OpenTelemetry. Earliest removal: first release on/after 2027-07-28.

Deprecated per SEP-2577 — see LoggingMessageNotification.

Fields

level: LoggingLevel

👎Deprecated since 0.4.0:

Deprecated per SEP-2577 (2026-07-28). Replacement: log to stderr for stdio transports or use OpenTelemetry. Earliest removal: first release on/after 2027-07-28.

Log level

logger: Option<String>

👎Deprecated since 0.4.0:

Deprecated per SEP-2577 (2026-07-28). Replacement: log to stderr for stdio transports or use OpenTelemetry. Earliest removal: first release on/after 2027-07-28.

Optional logger name

data: Value

👎Deprecated since 0.4.0:

Deprecated per SEP-2577 (2026-07-28). Replacement: log to stderr for stdio transports or use OpenTelemetry. Earliest removal: first release on/after 2027-07-28.

Log data (per MCP spec - any serializable type)

meta: Option<HashMap<String, Value>>

👎Deprecated since 0.4.0:

Deprecated per SEP-2577 (2026-07-28). Replacement: log to stderr for stdio transports or use OpenTelemetry. Earliest removal: first release on/after 2027-07-28.

Optional MCP meta information

Trait Implementations

impl Clone for LoggingMessageNotificationParams

fn clone(&self) -> LoggingMessageNotificationParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LoggingMessageNotificationParams

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LoggingMessageNotificationParams

fn deserialize<__D>( __deserializer: __D, ) -> Result<LoggingMessageNotificationParams, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl HasLevelParam for LoggingMessageNotificationParams

fn level(&self) -> &LoggingLevel

👎Deprecated since 0.4.0:

Deprecated per SEP-2577 (2026-07-28) along with the whole Logging surface.

impl HasLoggerParam for LoggingMessageNotificationParams

fn logger(&self) -> Option<&String>

impl HasMetaParam for LoggingMessageNotificationParams

fn meta(&self) -> Option<&HashMap<String, Value>>

impl Params for LoggingMessageNotificationParams

impl Serialize for LoggingMessageNotificationParams

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.