N8n Workflow Builder MCP

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by ifmelate

MCP server that allow LLM in agent mode builds n8n workflows for you

Install

$claude mcp add n8n-workflow-builder -- npx -y n8n-workflow-builder-mcp

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Tools (20)

add_ai_connections

Wire AI model, tools, and memory to an agent

add_connection

Create a connection between two nodes

add_node

Add a new node to a workflow

apply_workflow_plan

Apply a previously reviewed plan to the workflow on disk (atomic write)

compose_ai_workflow

Compose a complex AI workflow (agent + model + memory + embeddings + vector + tools + trigger) in one call, including wiring and basic validation

connect_main_chain

Build a minimal main path through AI workflow nodes (Trigger → Model → Memory → Embeddings → Doc Loader → Vector Store → Vector Tool → Agent)

create_workflow

Create a new n8n workflow

delete_node

Delete a node from a workflow

edit_node

Edit an existing node in a workflow

fix_node_params

Return parameters with defaults applied for required fields that are missing

get_n8n_version_info

Get current N8N version and capabilities

get_workflow_details

Get detailed information about a specific workflow

list_available_nodes

List available node types with optional filtering. Supports tag-style synonyms and multi-token OR/AND logic

list_missing_parameters

List required parameters missing for a node considering visibility rules

list_template_examples

List node usage examples extracted from free templates. Filter by nodetype or templatename

list_workflows

List workflows in the workspace

plan_workflow

Create a non-destructive plan (nodes and connections) to update a workflow. Does not write files

review_workflow_plan

Apply a plan in-memory and return validation errors, warnings, and suggested fixes. Does not write files

suggest_node_params

Suggest minimal valid parameters for a node type using defaults and required fields

validate_workflow

Validate a workflow file against node schemas and connectivity