22package  main
33
44import  (
5- 	"context" 
65	"encoding/json" 
76	"fmt" 
8- 	"log" 
97	"net/http" 
108	"os" 
119	"strings" 
12- 	"time" 
1310
1411	"github.com/evcc-io/openapi-mcp/pkg/openapi2mcp" 
1512	"github.com/getkin/kin-openapi/openapi3" 
16- 	"github.com/mark3labs/mcp-go/mcp" 
17- 	mcpserver "github.com/mark3labs/mcp-go/server" 
13+ 	"github.com/modelcontextprotocol/go-sdk/mcp" 
1814)
1915
2016// startServer starts the MCP server in stdio or HTTP mode, based on CLI flags. 
@@ -126,7 +122,7 @@ func startServer(flags *cliFlags, ops []openapi2mcp.OpenAPIOperation, doc *opena
126122}
127123
128124// makeMCPHandler returns an http.Handler that serves the MCP server at the given basePath. 
129- func  makeMCPHandler (srv  * mcpserver. MCPServer , basePath  string ) http.Handler  {
125+ func  makeMCPHandler (srv  * mcp. Server , basePath  string ) http.Handler  {
130126	return  openapi2mcp .HandlerForBasePath (srv , basePath )
131127}
132128
@@ -149,47 +145,54 @@ func formatHumanReadableLog(timestamp, logType, method string, id any, data inte
149145	case  "request" :
150146		log .WriteString ("📤 INCOMING REQUEST\n " )
151147
152- 		// Handle typed MCP request objects 
153- 		switch  req  :=  data .(type ) {
154- 		case  * mcp.CallToolRequest :
155- 			// Handle CallToolRequest directly 
156- 			log .WriteString (fmt .Sprintf ("🔧 Tool: %s\n " , req .Params .Name ))
157- 			args  :=  req .GetArguments ()
158- 			if  len (args ) >  0  {
159- 				log .WriteString ("📝 Arguments:\n " )
160- 				for  key , value  :=  range  args  {
161- 					valueStr  :=  formatValue (value , noTruncation )
162- 					log .WriteString (fmt .Sprintf ("   %s: %s\n " , key , valueStr ))
163- 				}
164- 			} else  {
165- 				log .WriteString ("📝 Arguments: (none)\n " )
166- 			}
167- 
168- 		case  * mcp.ListToolsRequest :
169- 			// ListToolsRequest typically has pagination params 
170- 			log .WriteString ("📝 Method: tools/list\n " )
171- 			if  req .Params .Cursor  !=  ""  {
172- 				log .WriteString (fmt .Sprintf ("   Cursor: %s\n " , req .Params .Cursor ))
173- 			}
174- 
175- 		case  * mcp.InitializeRequest :
176- 			log .WriteString ("📝 Method: initialize\n " )
177- 			log .WriteString (fmt .Sprintf ("   Protocol Version: %s\n " , req .Params .ProtocolVersion ))
178- 			if  req .Params .ClientInfo .Name  !=  ""  {
179- 				log .WriteString (fmt .Sprintf ("   Client: %s/%s\n " , req .Params .ClientInfo .Name , req .Params .ClientInfo .Version ))
180- 			}
181- 
182- 		case  * mcp.PingRequest :
183- 			log .WriteString ("📝 Method: ping\n " )
184- 
185- 		default :
186- 			// For other request types or if we can't determine the type, 
187- 			// try to marshal to JSON and display 
188- 			if  jsonData , err  :=  json .MarshalIndent (data , "   " , "  " ); err  ==  nil  {
189- 				log .WriteString (fmt .Sprintf ("📝 Request:\n    %s\n " , string (jsonData )))
190- 			} else  {
191- 				log .WriteString (fmt .Sprintf ("📝 Request type: %T\n " , data ))
192- 			}
148+ 		// Handle typed MCP request objects (commented out due to API changes) 
149+ 		// switch req := data.(type) { 
150+ 		// case *mcp.CallToolRequest: 
151+ 		// 	// Handle CallToolRequest directly 
152+ 		// 	log.WriteString(fmt.Sprintf("🔧 Tool: %s\n", req.Params.Name)) 
153+ 		// 	args := req.GetArguments() 
154+ 		// 	if len(args) > 0 { 
155+ 		// 		log.WriteString("📝 Arguments:\n") 
156+ 		// 		for key, value := range args { 
157+ 		// 			valueStr := formatValue(value, noTruncation) 
158+ 		// 			log.WriteString(fmt.Sprintf("   %s: %s\n", key, valueStr)) 
159+ 		// 		} 
160+ 		// 	} else { 
161+ 		// 		log.WriteString("📝 Arguments: (none)\n") 
162+ 		// 	} 
163+ 		// 
164+ 		// case *mcp.ListToolsRequest: 
165+ 		// 	// ListToolsRequest typically has pagination params 
166+ 		// 	log.WriteString("📝 Method: tools/list\n") 
167+ 		// 	if req.Params.Cursor != "" { 
168+ 		// 		log.WriteString(fmt.Sprintf("   Cursor: %s\n", req.Params.Cursor)) 
169+ 		// 	} 
170+ 		// 
171+ 		// case *mcp.InitializeRequest: 
172+ 		// 	log.WriteString("📝 Method: initialize\n") 
173+ 		// 	log.WriteString(fmt.Sprintf("   Protocol Version: %s\n", req.Params.ProtocolVersion)) 
174+ 		// 	if req.Params.ClientInfo.Name != "" { 
175+ 		// 		log.WriteString(fmt.Sprintf("   Client: %s/%s\n", req.Params.ClientInfo.Name, req.Params.ClientInfo.Version)) 
176+ 		// 	} 
177+ 		// 
178+ 		// case *mcp.PingRequest: 
179+ 		// 	log.WriteString("📝 Method: ping\n") 
180+ 		// 
181+ 		// default: 
182+ 		//	// For other request types or if we can't determine the type, 
183+ 		//	// try to marshal to JSON and display 
184+ 		//	if jsonData, err := json.MarshalIndent(data, "   ", "  "); err == nil { 
185+ 		//		log.WriteString(fmt.Sprintf("📝 Request:\n   %s\n", string(jsonData))) 
186+ 		//	} else { 
187+ 		//		log.WriteString(fmt.Sprintf("📝 Request type: %T\n", data)) 
188+ 		//	} 
189+ 		// } 
190+ 		
191+ 		// Generic fallback for logging (temporary until new API is implemented) 
192+ 		if  jsonData , err  :=  json .MarshalIndent (data , "   " , "  " ); err  ==  nil  {
193+ 			log .WriteString (fmt .Sprintf ("📝 Request:\n    %s\n " , string (jsonData )))
194+ 		} else  {
195+ 			log .WriteString (fmt .Sprintf ("📝 Request type: %T\n " , data ))
193196		}
194197
195198	case  "response" :
@@ -243,8 +246,8 @@ func formatHumanReadableLog(timestamp, logType, method string, id any, data inte
243246			if  len (result .Content ) >  0  {
244247				log .WriteString ("📋 Response Content:\n " )
245248				for  i , item  :=  range  result .Content  {
246- 					if  textContent , ok  :=  item .(mcp.TextContent ); ok  {
247- 						log .WriteString (fmt .Sprintf ("   [%d] Type: %s \n " , i + 1 ,  textContent . Type ))
249+ 					if  textContent , ok  :=  item .(* mcp.TextContent ); ok  {
250+ 						log .WriteString (fmt .Sprintf ("   [%d] Type: text \n " , i + 1 ))
248251						// Truncate very long responses 
249252						if  ! noTruncation  &&  len (textContent .Text ) >  500  {
250253							log .WriteString (fmt .Sprintf ("   [%d] Text: %s... (%d chars total)\n " ,
@@ -372,57 +375,60 @@ func formatValue(value interface{}, noTruncation bool) string {
372375}
373376
374377// createLoggingHooks creates MCP hooks for logging requests and responses to a file 
375- func  createLoggingHooks (logFilePath  string , noLogTruncation  bool ) (* mcpserver.Hooks , * os.File , error ) {
378+ // NOTE: Commented out due to API changes in MCP SDK v0.2.0 
379+ func  createLoggingHooks (logFilePath  string , noLogTruncation  bool ) (* os.File , error ) {
376380	logFile , err  :=  os .OpenFile (logFilePath , os .O_CREATE | os .O_WRONLY | os .O_APPEND , 0o644 )
377381	if  err  !=  nil  {
378- 		return  nil , nil ,  fmt .Errorf ("failed to open log file: %w" , err )
382+ 		return  nil , fmt .Errorf ("failed to open log file: %w" , err )
379383	}
380384
381- 	logger  :=  log .New (logFile , "" , 0 ) // No prefix, we'll format our own output 
385+ 	//  logger := log.New(logFile, "", 0) // No prefix, we'll format our own output
382386
383- 	hooks   :=   & mcpserver. Hooks {} 
387+ 	// Logging is now handled via LoggingTransport in the new SDK 
384388
389+ 	// TODO: Implement logging with the new SDK API 
390+ 	// The hooks API has been removed or changed in v0.2.0 
391+ 	
385392	// Log requests with human-readable format 
386- 	hooks .AddBeforeAny (func (ctx  context.Context , id  any , method  mcp.MCPMethod , message  any ) {
387- 		timestamp  :=  time .Now ().Format ("2006-01-02 15:04:05 MST" )
388- 		humanLog  :=  formatHumanReadableLog (timestamp , "request" , string (method ), id , message , nil , noLogTruncation )
389- 		logger .Print (humanLog )
390- 	})
393+ 	//  hooks.AddBeforeAny(func(ctx context.Context, id any, method mcp.MCPMethod, message any) {
394+ 	//  	timestamp := time.Now().Format("2006-01-02 15:04:05 MST")
395+ 	//  	humanLog := formatHumanReadableLog(timestamp, "request", string(method), id, message, nil, noLogTruncation)
396+ 	//  	logger.Print(humanLog)
397+ 	//  })
391398
392399	// Log successful responses with human-readable format 
393- 	hooks .AddOnSuccess (func (ctx  context.Context , id  any , method  mcp.MCPMethod , message  any , result  any ) {
394- 		timestamp  :=  time .Now ().Format ("2006-01-02 15:04:05 MST" )
395- 		humanLog  :=  formatHumanReadableLog (timestamp , "response" , string (method ), id , result , nil , noLogTruncation )
396- 		logger .Print (humanLog )
397- 	})
400+ 	//  hooks.AddOnSuccess(func(ctx context.Context, id any, method mcp.MCPMethod, message any, result any) {
401+ 	//  	timestamp := time.Now().Format("2006-01-02 15:04:05 MST")
402+ 	//  	humanLog := formatHumanReadableLog(timestamp, "response", string(method), id, result, nil, noLogTruncation)
403+ 	//  	logger.Print(humanLog)
404+ 	//  })
398405
399406	// Log errors with human-readable format 
400- 	hooks .AddOnError (func (ctx  context.Context , id  any , method  mcp.MCPMethod , message  any , err  error ) {
401- 		timestamp  :=  time .Now ().Format ("2006-01-02 15:04:05 MST" )
402- 		humanLog  :=  formatHumanReadableLog (timestamp , "error" , string (method ), id , message , err , noLogTruncation )
403- 		logger .Print (humanLog )
404- 	})
407+ 	//  hooks.AddOnError(func(ctx context.Context, id any, method mcp.MCPMethod, message any, err error) {
408+ 	//  	timestamp := time.Now().Format("2006-01-02 15:04:05 MST")
409+ 	//  	humanLog := formatHumanReadableLog(timestamp, "error", string(method), id, message, err, noLogTruncation)
410+ 	//  	logger.Print(humanLog)
411+ 	//  })
405412
406- 	return  hooks ,  logFile , nil 
413+ 	return  logFile , nil 
407414}
408415
409416// createServerWithOptions creates a new MCP server with the given operations and optional logging 
410- func  createServerWithOptions (name , version  string , doc  * openapi3.T , ops  []openapi2mcp.OpenAPIOperation , logFile  string , noLogTruncation  bool ) (* mcpserver.MCPServer , * os.File ) {
411- 	var  opts  []mcpserver.ServerOption 
417+ func  createServerWithOptions (name , version  string , doc  * openapi3.T , ops  []openapi2mcp.OpenAPIOperation , logFile  string , noLogTruncation  bool ) (* mcp.Server , * os.File ) {
412418	var  logFileHandle  * os.File 
413419
414420	if  logFile  !=  ""  {
415- 		hooks ,  fileHandle , err  :=  createLoggingHooks (logFile , noLogTruncation )
421+ 		fileHandle , err  :=  createLoggingHooks (logFile , noLogTruncation )
416422		if  err  !=  nil  {
417423			fmt .Fprintf (os .Stderr , "Failed to create logging hooks: %v\n " , err )
418424			os .Exit (1 )
419425		}
420426		logFileHandle  =  fileHandle 
421- 		opts  =  append (opts , mcpserver .WithHooks (hooks ))
422427		fmt .Fprintf (os .Stderr , "Logging MCP requests and responses to: %s\n " , logFile )
423428	}
424429
425- 	srv  :=  mcpserver .NewMCPServer (name , version , opts ... )
430+ 	impl  :=  & mcp.Implementation {Name : name , Version : version }
431+ 	srv  :=  mcp .NewServer (impl , nil )
426432	openapi2mcp .RegisterOpenAPITools (srv , ops , doc , nil )
427433	return  srv , logFileHandle 
428434}
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