Enum MCPMessage

pub enum MCPMessage {
    Initialize {
        protocol_version: String,
        capabilities: MCPCapabilities,
        client_info: MCPClientInfo,
    },
    InitializeResult {
        protocol_version: String,
        capabilities: MCPCapabilities,
        server_info: MCPServerInfo,
    },
    ListTools {
        cursor: Option<String>,
    },
    ListToolsResult {
        tools: Vec<MCPTool>,
        next_cursor: Option<String>,
    },
    CallTool {
        name: String,
        arguments: Value,
    },
    CallToolResult {
        content: Vec<MCPContent>,
        is_error: bool,
    },
    ListPrompts {
        cursor: Option<String>,
    },
    ListPromptsResult {
        prompts: Vec<MCPPrompt>,
        next_cursor: Option<String>,
    },
    GetPrompt {
        name: String,
        arguments: Option<Value>,
    },
    GetPromptResult {
        description: Option<String>,
        messages: Vec<MCPPromptMessage>,
    },
    ListResources {
        cursor: Option<String>,
    },
    ListResourcesResult {
        resources: Vec<MCPResource>,
        next_cursor: Option<String>,
    },
    ReadResource {
        uri: String,
    },
    ReadResourceResult {
        contents: Vec<MCPResourceContent>,
    },
    SubscribeResource {
        uri: String,
    },
    UnsubscribeResource {
        uri: String,
    },
    ResourceUpdated {
        uri: String,
    },
    ListLogs {
        cursor: Option<String>,
    },
    ListLogsResult {
        logs: Vec<MCPLogEntry>,
        next_cursor: Option<String>,
    },
    SetLogLevel {
        level: MCPLogLevel,
    },
    Error {
        code: i32,
        message: String,
        data: Option<Value>,
    },
}

MCP message types

Variants

Initialize

Initialize MCP session

Fields

protocol_version: String

MCP protocol version being used

capabilities: MCPCapabilities

Client capabilities for this session

client_info: MCPClientInfo

Information about the connecting client

InitializeResult

Initialize response

Fields

protocol_version: String

MCP protocol version the server supports

capabilities: MCPCapabilities

Server capabilities for this session

server_info: MCPServerInfo

Information about the MCP server

ListTools

List available tools

Fields

cursor: Option<String>

Pagination cursor for large tool lists

ListToolsResult

List tools response

Fields

tools: Vec<MCPTool>

Available tools on this server

next_cursor: Option<String>

Next pagination cursor if more tools available

CallTool

Call a tool

Fields

name: String

Name of the tool to call

arguments: Value

Arguments to pass to the tool

CallToolResult

Tool call response

Fields

content: Vec<MCPContent>

Content returned by the tool

is_error: bool

Whether the call resulted in an error

ListPrompts

List available prompts

Fields

cursor: Option<String>

Pagination cursor for large prompt lists

ListPromptsResult

List prompts response

Fields

prompts: Vec<MCPPrompt>

Available prompts on this server

next_cursor: Option<String>

Next pagination cursor if more prompts available

GetPrompt

Get a prompt

Fields

name: String

Name of the prompt to retrieve

arguments: Option<Value>

Arguments to customize the prompt

GetPromptResult

Get prompt response

Fields

description: Option<String>

Description of the prompt

messages: Vec<MCPPromptMessage>

Prompt messages/content

ListResources

List available resources

Fields

cursor: Option<String>

Pagination cursor for large resource lists

ListResourcesResult

List resources response

Fields

resources: Vec<MCPResource>

Available resources on this server

next_cursor: Option<String>

Next pagination cursor if more resources available

ReadResource

Read a resource

Fields

uri: String

URI of the resource to read

ReadResourceResult

Read resource response

Fields

contents: Vec<MCPResourceContent>

Contents of the requested resource

SubscribeResource

Subscribe to resource

Fields

uri: String

URI of the resource to subscribe to

UnsubscribeResource

Unsubscribe from resource

Fields

uri: String

URI of the resource to unsubscribe from

ResourceUpdated

Resource updated notification

Fields

uri: String

URI of the resource that was updated

ListLogs

List logs

Fields

cursor: Option<String>

Pagination cursor for large log lists

ListLogsResult

List logs response

Fields

logs: Vec<MCPLogEntry>

Log entries available on this server

next_cursor: Option<String>

Next pagination cursor if more logs available

SetLogLevel

Set log level

Fields

level: MCPLogLevel

Log level to set for the server

Error

Error response

Fields

code: i32

Error code identifying the type of error

message: String

Human-readable error message

data: Option<Value>

Optional additional error data

Trait Implementations

impl Clone for MCPMessage

fn clone(&self) -> MCPMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MCPMessage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MCPMessage

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MCPMessage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.