fix: disable broken GitHub code search tools (grep.app rate limited)

- Comment out grep_search, github_file, github_batch_files tools
- Grep.app is hitting rate limits / Vercel security checkpoint
- Keep SearXNG web search as primary working feature
- Downgrade mcp-go to v0.18.0 for Go 1.23 compatibility

go.mod

@@ -1,8 +1,8 @@
 module go_mcp_server_searxng
 
-go 1.24
+go 1.23
 
-require github.com/mark3labs/mcp-go v0.24.1
+require github.com/mark3labs/mcp-go v0.18.0
 
 require (
 	github.com/google/go-cmp v0.7.0 // indirect

go.sum

@@ -10,6 +10,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/mark3labs/mcp-go v0.18.0 h1:YuhgIVjNlTG2ZOwmrkORWyPTp0dz1opPEqvsPtySXao=
+github.com/mark3labs/mcp-go v0.18.0/go.mod h1:KmJndYv7GIgcPVwEKJjNcbhVQ+hJGJhrCCB/9xITzpE=
 github.com/mark3labs/mcp-go v0.24.1 h1:YV+5X/+W4oBdERLWgiA1uR7AIvenlKJaa5V4hqufI7E=
 github.com/mark3labs/mcp-go v0.24.1/go.mod h1:rXqOudj/djTORU/ThxYx8fqEVj/5pvTuuebQ2RC7uk4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

main.go

@@ -120,62 +120,62 @@ func main() {
 	)
 	mcpServer.AddTool(newsSearchTool, searxngNewsSearchHandler)
 
-	// Code Search Tools (via Grep.app)
+	// Code Search Tools (via Grep.app) - DISABLED due to rate limiting
-	grepSearchTool := mcp.NewTool("grep_search",
+	// grepSearchTool := mcp.NewTool("grep_search",
-		mcp.WithDescription("Search code across public GitHub repositories using grep.app. Find real-world code examples, patterns, and implementations."),
+	// 	mcp.WithDescription("Search code across public GitHub repositories using grep.app. Find real-world code examples, patterns, and implementations."),
-		mcp.WithString("query",
+	// 	mcp.WithString("query",
-			mcp.Required(),
+	// 		mcp.Required(),
-			mcp.Description("Search query string - code pattern to search for"),
+	// 		mcp.Description("Search query string - code pattern to search for"),
-		),
+	// 	),
-		mcp.WithString("language",
+	// 	mcp.WithString("language",
-			mcp.Description("Programming language filter (e.g., Go, Python, JavaScript, TypeScript)"),
+	// 		mcp.Description("Programming language filter (e.g., Go, Python, JavaScript, TypeScript)"),
-		),
+	// 	),
-		mcp.WithString("repo",
+	// 	mcp.WithString("repo",
-			mcp.Description("Repository filter in format 'owner/repo' (e.g., 'vercel/next.js')"),
+	// 		mcp.Description("Repository filter in format 'owner/repo' (e.g., 'vercel/next.js')"),
-		),
+	// 	),
-		mcp.WithString("path",
+	// 	mcp.WithString("path",
-			mcp.Description("Path filter for specific directories (e.g., 'src/', 'lib/')"),
+	// 		mcp.Description("Path filter for specific directories (e.g., 'src/', 'lib/')"),
-		),
+	// 	),
-		mcp.WithBoolean("regex",
+	// 	mcp.WithBoolean("regex",
-			mcp.Description("Treat query as regex pattern"),
+	// 		mcp.Description("Treat query as regex pattern"),
-		),
+	// 	),
-		mcp.WithBoolean("caseSensitive",
+	// 	mcp.WithBoolean("caseSensitive",
-			mcp.Description("Case-sensitive search"),
+	// 		mcp.Description("Case-sensitive search"),
-		),
+	// 	),
-		mcp.WithBoolean("wholeWords",
+	// 	mcp.WithBoolean("wholeWords",
-			mcp.Description("Search for whole words only"),
+	// 		mcp.Description("Search for whole words only"),
-		),
+	// 	),
-	)
+	// )
-	mcpServer.AddTool(grepSearchTool, grepSearchHandler)
+	// mcpServer.AddTool(grepSearchTool, grepSearchHandler)
 
-	githubFileTool := mcp.NewTool("github_file",
+	// githubFileTool := mcp.NewTool("github_file",
-		mcp.WithDescription("Fetch a single file from a GitHub repository"),
+	// 	mcp.WithDescription("Fetch a single file from a GitHub repository"),
-		mcp.WithString("owner",
+	// 	mcp.WithString("owner",
-			mcp.Required(),
+	// 		mcp.Required(),
-			mcp.Description("Repository owner (e.g., 'vercel', 'facebook')"),
+	// 		mcp.Description("Repository owner (e.g., 'vercel', 'facebook')"),
-		),
+	// 	),
-		mcp.WithString("repo",
+	// 	mcp.WithString("repo",
-			mcp.Required(),
+	// 		mcp.Required(),
-			mcp.Description("Repository name (e.g., 'next.js', 'react')"),
+	// 		mcp.Description("Repository name (e.g., 'next.js', 'react')"),
-		),
+	// 	),
-		mcp.WithString("path",
+	// 	mcp.WithString("path",
-			mcp.Required(),
+	// 		mcp.Required(),
-			mcp.Description("File path (e.g., 'package.json', 'src/index.ts')"),
+	// 		mcp.Description("File path (e.g., 'package.json', 'src/index.ts')"),
-		),
+	// 	),
-		mcp.WithString("ref",
+	// 	mcp.WithString("ref",
-			mcp.Description("Branch, tag, or commit SHA (default: default branch)"),
+	// 		mcp.Description("Branch, tag, or commit SHA (default: default branch)"),
-		),
+	// 	),
-	)
+	// )
-	mcpServer.AddTool(githubFileTool, githubFileHandler)
+	// mcpServer.AddTool(githubFileTool, githubFileHandler)
 
-	githubBatchFilesTool := mcp.NewTool("github_batch_files",
+	// githubBatchFilesTool := mcp.NewTool("github_batch_files",
-		mcp.WithDescription("Fetch multiple files from GitHub repositories in parallel"),
+	// 	mcp.WithDescription("Fetch multiple files from GitHub repositories in parallel"),
-		mcp.WithArray("files",
+	// 	mcp.WithArray("files",
-			mcp.Required(),
+	// 		mcp.Required(),
-			mcp.Description("Array of file objects with owner, repo, path, and optional ref"),
+	// 		mcp.Description("Array of file objects with owner, repo, path, and optional ref"),
-		),
+	// 	),
-	)
+	// )
-	mcpServer.AddTool(githubBatchFilesTool, githubBatchFilesHandler)
+	// mcpServer.AddTool(githubBatchFilesTool, githubBatchFilesHandler)
 
 	// New v2.0.0 Management Tools
 	searchStatusTool := mcp.NewTool("search_status",