MCP- N8N

Instructions

Implementation Reference

• src/index.ts:1035-1065 (handler)

  Handler for the 'delete-workflow' tool call. Retrieves the N8nClient by clientId, calls deleteWorkflow(id), and returns success or error message.

  case "delete-workflow": {
    const { clientId, id } = args as { clientId: string; id: string };
    const client = clients.get(clientId);
    if (!client) {
      return {
        content: [{
          type: "text",
          text: "Client not initialized. Please run init-n8n first.",
        }],
        isError: true
      };
    }
  
    try {
      const workflow = await client.deleteWorkflow(id);
      return {
        content: [{
          type: "text",
          text: `Successfully deleted workflow:\n${JSON.stringify(workflow, null, 2)}`,
        }]
      };
    } catch (error) {
      return {
        content: [{
          type: "text",
          text: error instanceof Error ? error.message : "Unknown error occurred",
        }],
        isError: true
      };
    }
  }

• src/index.ts:474-481 (schema)

  Input schema defining parameters for the delete-workflow tool: clientId and id, both required strings.

  inputSchema: {
    type: "object",
    properties: {
      clientId: { type: "string" },
      id: { type: "string" }
    },
    required: ["clientId", "id"]
  }

• src/index.ts:471-482 (registration)

  Registration of the 'delete-workflow' tool in the list of available tools returned by ListToolsRequestHandler.

  {
    name: "delete-workflow",
    description: "Delete a workflow by ID. This action cannot be undone. IMPORTANT: Arguments must be provided as compact, single-line JSON without whitespace or newlines.",
    inputSchema: {
      type: "object",
      properties: {
        clientId: { type: "string" },
        id: { type: "string" }
      },
      required: ["clientId", "id"]
    }
  },

• src/index.ts:186-190 (helper)

  Helper method in N8nClient class that makes the DELETE API request to /workflows/{id} to delete the workflow.

  async deleteWorkflow(id: string): Promise<N8nWorkflow> {
    return this.makeRequest<N8nWorkflow>(`/workflows/${id}`, {
      method: 'DELETE',
    });
  }