diff --git a/src/apm_cli/commands/marketplace.py b/src/apm_cli/commands/marketplace.py
index a3d34fd1b..a7c39d038 100644
--- a/src/apm_cli/commands/marketplace.py
+++ b/src/apm_cli/commands/marketplace.py
@@ -39,6 +39,7 @@ def add(repo, name, branch, verbose):
         from ..marketplace.client import _auto_detect_path, fetch_marketplace
         from ..marketplace.models import MarketplaceSource
         from ..marketplace.registry import add_marketplace
+        from ..utils.github_host import default_host
 
         # Parse OWNER/REPO
         if "/" not in repo:
@@ -72,11 +73,13 @@ def add(repo, name, branch, verbose):
         logger.verbose_detail(f"    Branch: {branch}")
 
         # Auto-detect marketplace.json location
+        host = default_host()
         probe_source = MarketplaceSource(
             name=display_name,
             owner=owner,
             repo=repo_name,
             branch=branch,
+            host=host,
         )
         detected_path = _auto_detect_path(probe_source)
 
@@ -96,6 +99,7 @@ def add(repo, name, branch, verbose):
             owner=owner,
             repo=repo_name,
             branch=branch,
+            host=host,
             path=detected_path,
         )
 
diff --git a/tests/unit/marketplace/test_marketplace_commands.py b/tests/unit/marketplace/test_marketplace_commands.py
index 7e77377d5..0bf1b7645 100644
--- a/tests/unit/marketplace/test_marketplace_commands.py
+++ b/tests/unit/marketplace/test_marketplace_commands.py
@@ -53,6 +53,29 @@ def test_successful_add(self, mock_detect, mock_fetch, runner):
         assert result.exit_code == 0
         assert "registered" in result.output.lower() or "1 plugin" in result.output
 
+    @patch("apm_cli.marketplace.client.fetch_marketplace")
+    @patch("apm_cli.marketplace.client._auto_detect_path")
+    def test_add_respects_github_host(self, mock_detect, mock_fetch, runner, monkeypatch):
+        from apm_cli.commands.marketplace import marketplace
+
+        monkeypatch.setenv("GITHUB_HOST", "ghe.corp.example.com")
+        mock_detect.return_value = "marketplace.json"
+        mock_fetch.return_value = MarketplaceManifest(
+            name="Test",
+            plugins=(MarketplacePlugin(name="p1"),),
+        )
+
+        result = runner.invoke(marketplace, ["add", "acme-org/plugins"])
+        assert result.exit_code == 0
+
+        # The probe source passed to _auto_detect_path should carry the GHE host
+        probe_source = mock_detect.call_args[0][0]
+        assert probe_source.host == "ghe.corp.example.com"
+
+        # The final source passed to fetch_marketplace should also carry it
+        final_source = mock_fetch.call_args[0][0]
+        assert final_source.host == "ghe.corp.example.com"
+
     @patch("apm_cli.marketplace.client._auto_detect_path")
     def test_no_marketplace_json_found(self, mock_detect, runner):
         from apm_cli.commands.marketplace import marketplace