Class McpToolProvider

java.lang.Object

dev.langchain4j.mcp.McpToolProvider

All Implemented Interfaces:

dev.langchain4j.service.tool.ToolProvider

public class McpToolProvider
extends Object
implements dev.langchain4j.service.tool.ToolProvider

A tool provider backed by one or more MCP clients.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	McpToolProvider.Builder

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	McpToolProvider(List<McpClient> mcpClients, boolean failIfOneServerFails, BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> mcpToolsFilter, Function<dev.langchain4j.service.tool.ToolExecutor, dev.langchain4j.service.tool.ToolExecutor> toolWrapper, McpResourcesAsToolsPresenter resourcesAsToolsPresenter, BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, String> toolNameMapper, BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, dev.langchain4j.agent.tool.ToolSpecification> toolSpecificationMapper)

Method Summary

Modifier and Type	Method	Description
void	addFilter(BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> filter)	Adds a tools filter that will act in conjunction (AND) with the eventually existing ones.
void	addMcpClient(McpClient client)	Adds a new MCP client to the list of clients.
static McpToolProvider.Builder	builder()
dev.langchain4j.service.tool.ToolProviderResult	provideTools(dev.langchain4j.service.tool.ToolProviderRequest request)
protected dev.langchain4j.service.tool.ToolProviderResult	provideTools(dev.langchain4j.service.tool.ToolProviderRequest request, BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> mcpToolsFilter)
void	removeMcpClient(McpClient client)	Removes an MCP client from the list of clients.
void	resetFilters()	Resets the all the eventually existing tools filters.
void	setFilter(BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> filter)	Sets the tools filter overriding the eventually existing ones.
void	setToolNameMapper(BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, String> toolNameMapper)	Sets the tool name mapper overriding the current one.
void	setToolSpecificationMapper(BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, dev.langchain4j.agent.tool.ToolSpecification> toolSpecificationMapper)	Sets the tool specification mapper overriding the current one.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface dev.langchain4j.service.tool.ToolProvider

isDynamic

Constructor Details

McpToolProvider

protected McpToolProvider(List<McpClient> mcpClients,
 boolean failIfOneServerFails,
 BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> mcpToolsFilter,
 Function<dev.langchain4j.service.tool.ToolExecutor, dev.langchain4j.service.tool.ToolExecutor> toolWrapper,
 McpResourcesAsToolsPresenter resourcesAsToolsPresenter,
 BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, String> toolNameMapper,
 BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, dev.langchain4j.agent.tool.ToolSpecification> toolSpecificationMapper)

Method Details

addMcpClient

public void addMcpClient(McpClient client)

Adds a new MCP client to the list of clients.

Parameters:

client - the MCP client to add

removeMcpClient

public void removeMcpClient(McpClient client)

Removes an MCP client from the list of clients.

Parameters:

client - the MCP client to remove

addFilter

public void addFilter(BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> filter)

Adds a tools filter that will act in conjunction (AND) with the eventually existing ones.

Parameters:

filter - the filter to add

setFilter

public void setFilter(BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> filter)

Sets the tools filter overriding the eventually existing ones.

Parameters:

filter - the filter to add

setToolNameMapper

public void setToolNameMapper(BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, String> toolNameMapper)

Sets the tool name mapper overriding the current one. The mapper can be null, in which case the tool names will be used as-is.

setToolSpecificationMapper

public void setToolSpecificationMapper(BiFunction<McpClient, dev.langchain4j.agent.tool.ToolSpecification, dev.langchain4j.agent.tool.ToolSpecification> toolSpecificationMapper)

Sets the tool specification mapper overriding the current one. The mapper can be null, in which case the tool specifications will be used as-is.

resetFilters

public void resetFilters()

Resets the all the eventually existing tools filters.

provideTools

public dev.langchain4j.service.tool.ToolProviderResult provideTools(dev.langchain4j.service.tool.ToolProviderRequest request)

Specified by:

provideTools in interface dev.langchain4j.service.tool.ToolProvider

provideTools

protected dev.langchain4j.service.tool.ToolProviderResult provideTools(dev.langchain4j.service.tool.ToolProviderRequest request,
 BiPredicate<McpClient, dev.langchain4j.agent.tool.ToolSpecification> mcpToolsFilter)

builder

public static McpToolProvider.Builder builder()