Module io.modelcontextprotocol.sdk.mcp
Package io.modelcontextprotocol.server

Class McpAsyncServerExchange

java.lang.Object
io.modelcontextprotocol.server.McpAsyncServerExchange
public class McpAsyncServerExchange extends Object
Represents an asynchronous exchange with a Model Context Protocol (MCP) client. The exchange provides methods to interact with the client and query its capabilities.
Author:
Dariusz Jędrzejczyk, Christian Tzolov

  • Constructor Details

    • McpAsyncServerExchange

      public McpAsyncServerExchange(McpServerSession session, McpSchema.ClientCapabilities clientCapabilities, McpSchema.Implementation clientInfo)
      Create a new asynchronous exchange with the client.
      Parameters:
      session - The server session representing a 1-1 interaction.
      clientCapabilities - The client capabilities that define the supported features and functionality.
      clientInfo - The client implementation information.

  • Method Details

    • getClientCapabilities

      public McpSchema.ClientCapabilities getClientCapabilities()
      Get the client capabilities that define the supported features and functionality.
      Returns:
      The client capabilities

    • getClientInfo

      public McpSchema.Implementation getClientInfo()
      Get the client implementation information.
      Returns:
      The client implementation details

    • createMessage

      public reactor.core.publisher.Mono<McpSchema.CreateMessageResult> createMessage(McpSchema.CreateMessageRequest createMessageRequest)
      Create a new message using the sampling capabilities of the client. The Model Context Protocol (MCP) provides a standardized way for servers to request LLM sampling (“completions” or “generations”) from language models via clients. This flow allows clients to maintain control over model access, selection, and permissions while enabling servers to leverage AI capabilities—with no server API keys necessary. Servers can request text or image-based interactions and optionally include context from MCP servers in their prompts.
      Parameters:
      createMessageRequest - The request to create a new message
      Returns:
      A Mono that completes when the message has been created
      See Also:

    • listRoots

      public reactor.core.publisher.Mono<McpSchema.ListRootsResult> listRoots()
      Retrieves the list of all roots provided by the client.
      Returns:
      A Mono that emits the list of roots result.

    • listRoots

      public reactor.core.publisher.Mono<McpSchema.ListRootsResult> listRoots(String cursor)
      Retrieves a paginated list of roots provided by the client.
      Parameters:
      cursor - Optional pagination cursor from a previous list request
      Returns:
      A Mono that emits the list of roots result containing

    • loggingNotification

      public reactor.core.publisher.Mono<Void> loggingNotification(McpSchema.LoggingMessageNotification loggingMessageNotification)
      Send a logging message notification to all connected clients. Messages below the current minimum logging level will be filtered out.
      Parameters:
      loggingMessageNotification - The logging message to send
      Returns:
      A Mono that completes when the notification has been sent