diff --git a/base/cvd/cuttlefish/host/commands/cvd/fetch/BUILD.bazel b/base/cvd/cuttlefish/host/commands/cvd/fetch/BUILD.bazel
index b32d774b19e..900cfcf74fc 100644
--- a/base/cvd/cuttlefish/host/commands/cvd/fetch/BUILD.bazel
+++ b/base/cvd/cuttlefish/host/commands/cvd/fetch/BUILD.bazel
@@ -14,7 +14,7 @@ cf_cc_library(
         "//cuttlefish/common/libs/utils:result",
         "//cuttlefish/host/commands/cvd/cache",
         "//cuttlefish/host/commands/cvd/fetch:credential_flags",
-        "//cuttlefish/host/libs/web:android_build_api",
+        "//cuttlefish/host/libs/web:android_build_url",
         "//cuttlefish/host/libs/web/cas:cas_flags",
         "//libbase",
     ],
diff --git a/base/cvd/cuttlefish/host/commands/cvd/fetch/build_api_flags.h b/base/cvd/cuttlefish/host/commands/cvd/fetch/build_api_flags.h
index f586298a79e..a356bdac1e9 100644
--- a/base/cvd/cuttlefish/host/commands/cvd/fetch/build_api_flags.h
+++ b/base/cvd/cuttlefish/host/commands/cvd/fetch/build_api_flags.h
@@ -22,7 +22,7 @@
 
 #include "cuttlefish/host/commands/cvd/cache/cache.h"
 #include "cuttlefish/host/commands/cvd/fetch/credential_flags.h"
-#include "cuttlefish/host/libs/web/android_build_api.h"
+#include "cuttlefish/host/libs/web/android_build_url.h"
 #include "cuttlefish/host/libs/web/cas/cas_flags.h"
 
 namespace cuttlefish {
diff --git a/base/cvd/cuttlefish/host/libs/web/android_build_api.cpp b/base/cvd/cuttlefish/host/libs/web/android_build_api.cpp
index 080ddc0aecb..58b95c0b5f5 100644
--- a/base/cvd/cuttlefish/host/libs/web/android_build_api.cpp
+++ b/base/cvd/cuttlefish/host/libs/web/android_build_api.cpp
@@ -58,7 +58,15 @@ namespace {
 
 bool StatusIsTerminal(const std::string& status) {
   const static std::set<std::string> terminal_statuses = {
-      "abandoned", "complete", "error", "ABANDONED", "COMPLETE", "ERROR",
+      "abandoned",
+      "ABANDONED",
+      "built",
+      "BUILT",
+      // deprecated in v4, but kept around for compatibility until removed
+      "complete",
+      "COMPLETE",
+      "error",
+      "ERROR",
   };
   return terminal_statuses.count(status) > 0;
 }
@@ -213,8 +221,8 @@ Result<AndroidBuildApi::BuildInfo> AndroidBuildApi::GetBuildInfo(
           << no_auth_error_message);
 
   bool is_signed = false;
-  if (json.isMember("signed")) {
-    is_signed = json["signed"].asBool();
+  if (HasValue(json, {"buildSigned"})) {
+    is_signed = CF_EXPECT(GetValue<bool>(json, {"buildSigned"}));
   }
 
   return AndroidBuildApi::BuildInfo{
@@ -267,6 +275,7 @@ Result<std::optional<std::string>> AndroidBuildApi::LatestBuildId(
                                       "Error fetching last known good build "
                                       "id for:\nbranch \"{}\", target \"{}\"",
                                       branch, target);
+  LOG(INFO) << "\n\n TODO CJR \n\n" << "LatestBuildId response:\n" << json;
   if (!json.isMember("builds")) {
     return std::nullopt;
   }
diff --git a/base/cvd/cuttlefish/host/libs/web/android_build_api.h b/base/cvd/cuttlefish/host/libs/web/android_build_api.h
index c6cb2c3dbf0..a0e8a6609f9 100644
--- a/base/cvd/cuttlefish/host/libs/web/android_build_api.h
+++ b/base/cvd/cuttlefish/host/libs/web/android_build_api.h
@@ -35,9 +35,6 @@
 
 namespace cuttlefish {
 
-inline constexpr char kAndroidBuildServiceUrl[] =
-    "https://www.googleapis.com/android/internal/build/v3";
-
 class AndroidBuildApi : public BuildApi {
  public:
   AndroidBuildApi() = delete;
diff --git a/base/cvd/cuttlefish/host/libs/web/android_build_url.cpp b/base/cvd/cuttlefish/host/libs/web/android_build_url.cpp
index 356e2d53648..6975013b57a 100644
--- a/base/cvd/cuttlefish/host/libs/web/android_build_url.cpp
+++ b/base/cvd/cuttlefish/host/libs/web/android_build_url.cpp
@@ -118,12 +118,12 @@ AndroidBuildUrl::AndroidBuildUrl(std::string api_base_url, std::string api_key,
 std::string AndroidBuildUrl::GetLatestBuildIdUrl(std::string_view branch,
                                                  std::string_view target) {
   UrlBuilder builder = UrlBuilder::GetLatestBuildIdBaseUrl(api_base_url_);
-  builder.AddQueryParameter("buildAttemptStatus", "complete");
+  builder.AddQueryParameter("buildAttemptStatus", "built");
   builder.AddQueryParameter("buildType", "submitted");
-  builder.AddQueryParameter("maxResults", "1");
+  builder.AddQueryParameter("pageSize", "1");
   builder.AddQueryParameter("successful", "true");
-  builder.AddQueryParameter("branch", branch);
-  builder.AddQueryParameter("target", target);
+  builder.AddQueryParameter("branches", branch);
+  builder.AddQueryParameter("targets", target);
   builder.AddApiKeyAndProjectId(api_key_, project_id_);
 
   return builder.GetUrl();
@@ -143,7 +143,7 @@ std::string AndroidBuildUrl::GetArtifactUrl(
     std::string_view page_token) {
   UrlBuilder builder =
       UrlBuilder::GetArtifactBaseUrl(api_base_url_, id, target);
-  builder.AddQueryParameter("maxResults", "100");
+  builder.AddQueryParameter("pageSize", "100"); // maximum value allowed by API
   if (!artifact_filenames.empty()) {
     builder.AddQueryParameter("nameRegexp",
                               BuildNameRegexp(artifact_filenames));
diff --git a/base/cvd/cuttlefish/host/libs/web/android_build_url.h b/base/cvd/cuttlefish/host/libs/web/android_build_url.h
index 7bd29805099..21098fbf7fa 100644
--- a/base/cvd/cuttlefish/host/libs/web/android_build_url.h
+++ b/base/cvd/cuttlefish/host/libs/web/android_build_url.h
@@ -21,6 +21,9 @@
 
 namespace cuttlefish {
 
+inline constexpr char kAndroidBuildServiceUrl[] =
+    "https://androidbuild-pa.googleapis.com/v4";
+
 class AndroidBuildUrl {
  public:
   AndroidBuildUrl(std::string api_base_url, std::string api_key,