xml.Revit.MCPServer

# How to Create and Generate MCP DLL Files for CallFunc Invocation This document describes how to create an MCP DLL file for invocation by the CallFunc method. The MCP DLL file needs to implement the interface `xml.Revit.MCP.Public.IMCPMethod` and interact with Revit's MCP service according to the JSON-RPC 2.0 specification. ## Structure and Implementation of MCP DLL Create an Implementation Class Implement the `IMCPMethod` Interface Below is an example of an implementation class that creates a new level and returns the new level as an `ElementModelRequest`: ```C# using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Threading; using System.Threading.Tasks; using Autodesk.Revit.DB; using Autodesk.Revit.DB.Architecture; using Autodesk.Revit.DB.Structure; using Autodesk.Revit.UI; using Newtonsoft.Json; using Newtonsoft.Json.Linq; using xml.Revit.MCP.Models; using xml.Revit.MCP.Public; using xml.Revit.Toolkit.Attributes; using xml.Revit.Toolkit.Extensions; using xml.Revit.Toolkit.Utils; namespace xml.Revit.MCPServer { /// <summary> /// Class that implements the functionality to add a new level, inheriting from the IMCPMethod interface. /// </summary> public sealed class TopLevelAdd : IMCPMethod { /// <summary> /// Constructor that initializes the method name. /// </summary> public TopLevelAdd() { MethodName = "Add New Level"; } /// <summary> /// Method name used to identify the current functionality. /// </summary> public string MethodName { get; private set; } /// <summary> /// Executes the core logic for adding a new level. /// </summary> /// <param name="request">A JsonRPCRequest object containing the request parameters.</param> /// <param name="uidoc">The current Revit UIDocument object.</param> /// <returns>Returns a JsonRPCResponse object containing the execution result.</returns> public JsonRPCResponse Execute(JsonRPCRequest request, UIDocument uidoc) { // Initialize response object var jsonResponse = new JsonRPCResponse(); // Get the current document var doc = uidoc.Document; // Default elevation offset in millimeters double elevationOffset = 3000d; // Parse elevation offset from request parameters var obj = request.Params as JObject; if (obj != null) { elevationOffset = obj["offset"].Value<double>(); } // Get the highest level in the document var highestLevel = doc.OfClass<Level>().OrderBy(l => l.Elevation).LastOrDefault(); if (highestLevel == null) { throw new InvalidOperationException("No valid level found."); } // Start a transaction and create a new level doc.Transaction(t => { var newLevel = Level.Create( doc, highestLevel.Elevation + elevationOffset.MMToFeet() // Convert offset to feet ); // Encapsulate new level information into the response result jsonResponse.Result = new ElementModelRequest(newLevel); }); return jsonResponse; // Return response object } } } ``` Compile the project in Visual Studio to generate the .dll file. After compilation, ensure that the generated .dll file is located in the specified MCP folder.  By following the above steps, you can easily create and generate MCP DLL files and integrate them into Revit's MCP service for dynamic invocation.  ## mcp-tool [call_func Click Here for Source Implementation](https://github.com/ZedMoster/revit-mcp/blob/main/xml_revit_mcp/tools.py#L204) In large models, you can directly implement it by pressing the prompt word through `CallFunc` ```python response = call_func(ctx, params=[ {"name": "Add New Level", "params": {"offset": 3000}} ]) ```