Package dev.langchain4j.mcp.client.transport

Interface McpTransport

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

HttpMcpTransport, StdioMcpTransport

public interface McpTransport
extends Closeable

Method Summary

Modifier and Type	Method	Description
void	executeOperationWithoutResponse(McpClientMessage request)	Sends a message that does not expect a response from the server.
CompletableFuture<com.fasterxml.jackson.databind.JsonNode>	executeOperationWithResponse(McpClientMessage request)	Executes an operation that expects a response from the server.
CompletableFuture<com.fasterxml.jackson.databind.JsonNode>	initialize(McpInitializeRequest request)	Sends the "initialize" message to the MCP server to negotiate capabilities, supported protocol version etc.
void	start(McpOperationHandler messageHandler)	Creates a connection to the MCP server (runs the server as a subprocess if needed).

Methods inherited from interface java.io.Closeable

close

Method Details

start

void start(McpOperationHandler messageHandler)

Creates a connection to the MCP server (runs the server as a subprocess if needed). This does NOT yet send the "initialize" message to negotiate capabilities.

initialize

CompletableFuture<com.fasterxml.jackson.databind.JsonNode> initialize(McpInitializeRequest request)

Sends the "initialize" message to the MCP server to negotiate capabilities, supported protocol version etc. When this method returns successfully, the transport is fully initialized and ready to be used. This has to be called AFTER the "start" method.

executeOperationWithResponse

CompletableFuture<com.fasterxml.jackson.databind.JsonNode> executeOperationWithResponse(McpClientMessage request)

Executes an operation that expects a response from the server.

executeOperationWithoutResponse

void executeOperationWithoutResponse(McpClientMessage request)

Sends a message that does not expect a response from the server. The 'id' field of the message should be null.