Enum McpNotification 

pub enum McpNotification {
    ToolsListChanged,
    ResourcesListChanged,
    PromptsListChanged,
    Progress {
        progress_token: String,
        progress: f64,
        total: Option<f64>,
    },
    LogMessage {
        level: LogLevel,
        logger: Option<String>,
        message: String,
        data: Option<Value>,
    },
    Custom {
        method: String,
        params: Option<Value>,
    },
}

Notification types that can be sent from server to client.

MCP supports various notification types for real-time updates. Notifications are one-way messages from server to client and don’t expect a response.

Notification Types

• ToolsListChanged: Notify when available tools have changed
• ResourcesListChanged: Notify when available resources have changed
• PromptsListChanged: Notify when available prompts have changed
• Progress: Send progress updates for long-running operations
• LogMessage: Send log messages with different severity levels
• Custom: Send custom notifications with arbitrary method names

Examples

use solidmcp::handler::{McpNotification, LogLevel};
use serde_json::json;

// Send a log message
let notification = McpNotification::LogMessage {
    level: LogLevel::Info,
    logger: Some("file_processor".to_string()),
    message: "Processing complete".to_string(),
    data: Some(json!({
        "files_processed": 42,
        "duration_ms": 1234
    })),
};

// Send progress update
let progress = McpNotification::Progress {
    progress_token: "task-123".to_string(),
    progress: 25.0,
    total: Some(100.0),
};

// Notify about resource changes
let resource_update = McpNotification::ResourcesListChanged;

Variants

ToolsListChanged

Tools have changed

ResourcesListChanged

Resources have changed

PromptsListChanged

Prompts have changed

Progress

Progress notification

Fields

progress_token: String

progress: f64

total: Option<f64>

LogMessage

Log message

Fields

level: LogLevel

logger: Option<String>

message: String

data: Option<Value>

Custom

Custom notification

Fields

method: String

params: Option<Value>

Trait Implementations

impl Clone for McpNotification

fn clone(&self) -> McpNotification

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for McpNotification

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

Formats the value using the given formatter.