diff --git a/app/Utils/RepositoryUtils.php b/app/Utils/RepositoryUtils.php
index b18f0cc098..0caad6fb5a 100644
--- a/app/Utils/RepositoryUtils.php
+++ b/app/Utils/RepositoryUtils.php
@@ -10,10 +10,31 @@
 use CDash\Model\Project;
 use CDash\ServiceContainer;
 use Illuminate\Support\Facades\Log;
+use Illuminate\Support\Str;
+use Illuminate\Support\Uri;
 use PDO;
 
 class RepositoryUtils
 {
+    public static function getEnterpriseUrl(): ?string
+    {
+        $url = config('cdash.github_enterprise_url');
+        return is_string($url) && $url !== '' ? $url : null;
+    }
+
+    public static function isGitHubUrl(string $url): bool
+    {
+        if (str_contains($url, 'github.com')) {
+            return true;
+        }
+        $enterpriseUrl = self::getEnterpriseUrl();
+        if ($enterpriseUrl !== null) {
+            $host = Uri::of($enterpriseUrl)->host();
+            return is_string($host) && str_contains($url, $host);
+        }
+        return false;
+    }
+
     /** Return the GitHub diff URL */
     public static function get_github_diff_url($projecturl, $directory, $file, $revision)
     {
@@ -143,22 +164,21 @@ public static function post_pull_request_comment($projectid, $pull_request, $com
         }
     }
 
-    /** Convert GitHub repository viewer URL into corresponding API URL. */
-    public static function get_github_api_url($github_url): string
+    /**
+     * Convert a GitHub repository viewer URL (e.g. https://<host>/<user>/<repo>)
+     * into the corresponding REST API URL.
+     */
+    public static function get_github_api_url(string $github_url): string
     {
-        /*
-         * For a URL of the form:
-         * ...://github.com/<user>/<repo>
-         * We return:
-         * ...://api.github.com/repos/<user>/<repo>
-         */
-        $idx1 = strpos($github_url, 'github.com');
-        $idx2 = $idx1 + strlen('github.com/');
-        $api_url = substr($github_url, 0, $idx2);
-        $api_url = str_replace('github.com', 'api.github.com', $api_url);
-        $api_url .= 'repos/';
-        $api_url .= substr($github_url, $idx2);
-        return $api_url;
+        $enterpriseUrl = self::getEnterpriseUrl();
+        $host = $enterpriseUrl !== null ? Uri::of($enterpriseUrl)->host() : null;
+
+        if (is_string($host) && str_contains($github_url, $host)) {
+            // GHE uses <host>/api/v3/repos/ as the API base
+            return Str::replaceFirst($host . '/', $host . '/api/v3/repos/', $github_url);
+        }
+        // GitHub.com uses api.github.com/repos/ as the API base
+        return Str::replaceFirst('github.com/', 'api.github.com/repos/', $github_url);
     }
 
     public static function post_github_pull_request_comment(Project $project, $pull_request, $comment, $cdash_url): void
@@ -166,7 +186,7 @@ public static function post_github_pull_request_comment(Project $project, $pull_
         $repo = null;
         $repositories = $project->GetRepositories();
         foreach ($repositories as $repository) {
-            if (str_contains($repository['url'], 'github.com')) {
+            if (self::isGitHubUrl($repository['url'])) {
                 $repo = $repository;
                 break;
             }
diff --git a/app/cdash/app/Lib/Repository/GitHub.php b/app/cdash/app/Lib/Repository/GitHub.php
index 32383b1374..644d5db5e9 100644
--- a/app/cdash/app/Lib/Repository/GitHub.php
+++ b/app/cdash/app/Lib/Repository/GitHub.php
@@ -19,6 +19,7 @@
 
 use App\Models\BuildUpdateFile;
 use App\Models\PendingSubmissions;
+use App\Utils\RepositoryUtils;
 use CDash\Database;
 use CDash\Model\Build;
 use CDash\Model\BuildUpdate;
@@ -76,7 +77,7 @@ public function __construct(Project $project)
 
         $repositories = $this->project->GetRepositories();
         foreach ($repositories as $repo) {
-            if (str_contains($repo['url'], 'github.com')) {
+            if (RepositoryUtils::isGitHubUrl($repo['url'])) {
                 $this->installationId = $repo['username'];
                 break;
             }
@@ -93,7 +94,8 @@ public function setApiClient(GitHubClient $client): void
     protected function initializeApiClient(): void
     {
         $builder = new GitHubBuilder();
-        $apiClient = new GitHubClient($builder, 'machine-man-preview');
+        $enterpriseUrl = RepositoryUtils::getEnterpriseUrl();
+        $apiClient = new GitHubClient($builder, null, $enterpriseUrl);
         $this->setApiClient($apiClient);
     }
 
diff --git a/config/cdash.php b/config/cdash.php
index 670da91ac7..018976e531 100755
--- a/config/cdash.php
+++ b/config/cdash.php
@@ -39,6 +39,7 @@
     'delete_old_subprojects' => env('DELETE_OLD_SUBPROJECTS', true),
     'github_always_pass' => env('GITHUB_ALWAYS_PASS', false),
     'github_app_id' => env('GITHUB_APP_ID', null),
+    'github_enterprise_url' => env('GITHUB_ENTERPRISE_URL', null),
     'github_private_key' => env('GITHUB_PRIVATE_KEY', null),
     'github_webhook_secret' => env('GITHUB_WEBHOOK_SECRET', null),
     'large_text_limit' => env('LARGE_TEXT_LIMIT', 0),
diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index 8f26dd0f91..629adc160b 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -5436,12 +5436,6 @@ parameters:
 			count: 1
 			path: app/Utils/RepositoryUtils.php
 
-		-
-			rawMessage: 'Method App\Utils\RepositoryUtils::get_github_api_url() has parameter $github_url with no type specified.'
-			identifier: missingType.parameter
-			count: 1
-			path: app/Utils/RepositoryUtils.php
-
 		-
 			rawMessage: 'Method App\Utils\RepositoryUtils::get_github_diff_url() has no return type specified.'
 			identifier: missingType.return
@@ -5628,12 +5622,6 @@ parameters:
 			count: 1
 			path: app/Utils/RepositoryUtils.php
 
-		-
-			rawMessage: 'Only numeric types are allowed in +, int<0, max>|false given on the left side.'
-			identifier: plus.leftNonNumeric
-			count: 1
-			path: app/Utils/RepositoryUtils.php
-
 		-
 			rawMessage: 'Only numeric types are allowed in +, int|false given on the left side.'
 			identifier: plus.leftNonNumeric