Fix Google Vertex global endpoint

For the global GCP endpoint, the URL is contructed starting with
https://aiplatform.googleapis.com/ instead of
https://${GOOGLE_CLOUD_LOCATION}-aiplatform.googleapis.com.

commit: e7dc295707a4a869470b9fd317f3d2e207593c8e
author: Eckhart Koeppen · 3mo ago · 2026-07-06 09:19 UTC
committer: Eckhart Köppen · 3mo ago · 2026-07-12 13:11 UTC
parent: 9559c57
signature: unsigned

1 file · +10 -2

M packages/provider/google_vertex.go +10 -2


@@ -311,7 +311,11 @@ func (t vertexTransport) RoundTrip(req http.Request) (*http.Response, error) {
311	311		newPath := fmt.Sprintf("/v1/projects/%s/locations/%s/publishers/google/models/%s%s",
312	312		t.cfg.project, t.cfg.location, modelID, verb)
313	313		clone := req.Clone(req.Context())
314		-	clone.URL.Host = t.cfg.location + "-aiplatform.googleapis.com"
	314	+	if t.cfg.location == "global" {
	315	+	clone.URL.Host = "aiplatform.googleapis.com"
	316	+	} else {
	317	+	clone.URL.Host = t.cfg.location + "-aiplatform.googleapis.com"
	318	+	}
315	319		clone.URL.Path = newPath
316	320		// Drop existing auth header and pick the right one.
317	321		clone.Header.Del("x-goog-api-key")

@@ -336,9 +340,13 @@ func NewVertex(_ string, _ string) Client {
336	340		if err != nil {
337	341		return &unimplementedClient{name: "google-vertex", hint: err.Error()}
338	342		}
	343	+	baseHost := "aiplatform.googleapis.com"
	344	+	if cfg.location != "global" {
	345	+	baseHost = cfg.location + "-aiplatform.googleapis.com"
	346	+	}
339	347		inner := &geminiClient{
340	348		apiKey: "vertex-placeholder", // overwritten by transport
341		-	baseURL: "https://" + cfg.location + "-aiplatform.googleapis.com",
	349	+	baseURL: "https://" + baseHost,
342	350		http: &http.Client{
343	351		Transport: &vertexTransport{inner: http.DefaultTransport, cfg: cfg},
344	352		Timeout: 0,

 	newPath := fmt.Sprintf("/v1/projects/%s/locations/%s/publishers/google/models/%s%s",
 		t.cfg.project, t.cfg.location, modelID, verb)
 	clone := req.Clone(req.Context())
-	clone.URL.Host = t.cfg.location + "-aiplatform.googleapis.com"
+	if t.cfg.location == "global" {
+		clone.URL.Host = "aiplatform.googleapis.com"
+	} else {
+		clone.URL.Host = t.cfg.location + "-aiplatform.googleapis.com"
+	}
 	clone.URL.Path = newPath
 	// Drop existing auth header and pick the right one.
 	clone.Header.Del("x-goog-api-key")
 	if err != nil {
 		return &unimplementedClient{name: "google-vertex", hint: err.Error()}
 	}
+	baseHost := "aiplatform.googleapis.com"
+	if cfg.location != "global" {
+		baseHost = cfg.location + "-aiplatform.googleapis.com"
+	}
 	inner := &geminiClient{
 		apiKey:  "vertex-placeholder", // overwritten by transport
-		baseURL: "https://" + cfg.location + "-aiplatform.googleapis.com",
+		baseURL: "https://" + baseHost,
 		http: &http.Client{
 			Transport: &vertexTransport{inner: http.DefaultTransport, cfg: cfg},
 			Timeout:   0,