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What is the MCP server?
The MCP server is a core component of the n8n workflow automation platform, responsible for managing and maintaining the model context to ensure data consistency and efficient communication between different workflow nodes.How to use the MCP server?
The MCP server functionality is automatically used when configuring workflows through the n8n platform, no additional settings are required. Advanced users can interact directly with the MCP server through the API.Use cases
Suitable for automation scenarios that require sharing model states across multiple workflow nodes, managing complex data flows, or implementing long - term conversation memory.Main features
Context managementCentrally store and manage model states and context data during workflow execution
Cross - node communicationSupport sharing and synchronizing model data between different workflow nodes
Version controlRecord historical changes of model states and support rolling back to a specific version
Advantages and limitations
Advantages
Improve workflow execution efficiency and reduce redundant calculations
Simplify the design and maintenance of complex workflows
Provide a consistent data view to avoid data inconsistencies between nodes
Limitations
Require additional system resources to maintain context states
May add unnecessary complexity to simple workflows
Initial configuration requires a certain learning cost
How to use
Enable MCP functionality
Set'mcp.enabled' to true in the n8n configuration file
Create a workflow
Design workflows as usual, and MCP will automatically manage the context between nodes
Access context data
Access context variables through expressions where needed, such as {{$context.modelState}}
Usage examples
Cross - node state sharingIn the chatbot workflow, keep the conversation history shared among multiple processing nodes
Long - term task status trackingTrack the progress and intermediate results of long - running tasks
Frequently Asked Questions
How much latency will the MCP server add?
Will the context data be persistently stored?
How to clear the no - longer - needed context?
Related resources
n8n official documentation
Contains detailed technical descriptions of the MCP server
GitHub repository
n8n open - source code repository
MCP API reference
Complete MCP server API documentation
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