feat: enterprise host support

README.md

@@ -122,6 +122,7 @@ and set it as the GITHUB_PERSONAL_ACCESS_TOKEN environment variable.
   - `pull_number`: Pull request number (number, required)
 
 - **get_pull_request_reviews** - Get the reviews on a pull request
+
   - `owner`: Repository owner (string, required)
   - `repo`: Repository name (string, required)
   - `pull_number`: Pull request number (number, required)
@@ -375,7 +376,7 @@ Run **Preferences: Open User Settings (JSON)**, and create or append to the `mcp
         "args": ["stdio"],
         "env": {
           "GITHUB_PERSONAL_ACCESS_TOKEN": "${input:githubpat}"
-        },
+        }
       }
     }
   }
@@ -391,6 +392,10 @@ Try something like the following prompt to verify that it works:
 I'd like to know more about my GitHub profile.
 ```
 
+## GitHub Enterprise Server
+
+The flag `--gh-host` and the environment variable `GH_HOST` can be used to set the GitHub Enterprise Server hostname.
+
 ## TODO
 
 Testing

cmd/github-mcp-server/main.go

@@ -54,12 +54,14 @@ func init() {
 	rootCmd.PersistentFlags().String("log-file", "", "Path to log file")
 	rootCmd.PersistentFlags().Bool("enable-command-logging", false, "When enabled, the server will log all command requests and responses to the log file")
 	rootCmd.PersistentFlags().Bool("export-translations", false, "Save translations to a JSON file")
+	rootCmd.PersistentFlags().String("gh-host", "", "Specify the GitHub hostname (for GitHub Enterprise etc.)")
 
 	// Bind flag to viper
 	viper.BindPFlag("read-only", rootCmd.PersistentFlags().Lookup("read-only"))
 	viper.BindPFlag("log-file", rootCmd.PersistentFlags().Lookup("log-file"))
 	viper.BindPFlag("enable-command-logging", rootCmd.PersistentFlags().Lookup("enable-command-logging"))
 	viper.BindPFlag("export-translations", rootCmd.PersistentFlags().Lookup("export-translations"))
+	viper.BindPFlag("gh-host", rootCmd.PersistentFlags().Lookup("gh-host"))
 
 	// Add subcommands
 	rootCmd.AddCommand(stdioCmd)
@@ -100,6 +102,20 @@ func runStdioServer(readOnly bool, logger *log.Logger, logCommands bool, exportT
 	}
 	ghClient := gogithub.NewClient(nil).WithAuthToken(token)
 
+	// Check GH_HOST env var first, then fall back to viper config
+	host := os.Getenv("GH_HOST")
+	if host == "" {
+		host = viper.GetString("gh-host")
+	}
+
+	if host != "" {
+		var err error
+		ghClient, err = ghClient.WithEnterpriseURLs(host, host)
+		if err != nil {
+			return fmt.Errorf("failed to create GitHub client with host: %w", err)
+		}
+	}
+
 	t, dumpTranslations := translations.TranslationHelper()
 
 	// Create