Module capability 

Capability flags for MCP clients and servers.

Capabilities are negotiated during the initialization handshake. They determine what features are available in the session.

Structs

ClientCapabilities

Client capabilities advertised during initialization.

ClientInfo

Client information provided during initialization.

CompletionCapability

Completion capability flags.

ElicitationCapability

Elicitation capability flags.

ElicitationTaskCapability

capabilities.tasks.requests.elicitation.

InitializeRequest

Initialize request parameters.

InitializeResult

Initialize response.

InitializedNotification

Initialized notification (sent by client after receiving initialize result).

LoggingCapability

Logging capability flags.

PingRequest

Ping request for keep-alive.

PingResult

Ping response.

PromptCapability

Prompt capability flags.

ResourceCapability

Resource capability flags.

RootsCapability

Roots capability flags.

SamplingCapability

Sampling capability flags.

SamplingTaskCapability

capabilities.tasks.requests.sampling.

ServerCapabilities

Server capabilities advertised during initialization.

ServerInfo

Server information provided during initialization.

TaskRequestsCapability

capabilities.tasks.requests: the request types that accept a task field, by category.

TasksCapability

capabilities.tasks (2025-11-25).

ToolCapability

Tool capability flags.

ToolsTaskCapability

capabilities.tasks.requests.tools.

Enums

VersionNegotiationResult

Protocol version negotiation result.

Constants

PROTOCOL_VERSION

The latest protocol version supported by this implementation.

SUPPORTED_PROTOCOL_VERSIONS

All protocol versions supported by this implementation.

Functions

is_version_supported

Check if a protocol version is supported by this implementation.

negotiate_version

Negotiate a protocol version between client and server.

negotiate_version_detailed

Perform version negotiation and return detailed result.