diff --git a/packages/cmd/root.go b/packages/cmd/root.go
index 1a8bfa62..81728198 100644
--- a/packages/cmd/root.go
+++ b/packages/cmd/root.go
@@ -21,6 +21,14 @@ import (
 
 var Telemetry *telemetry.Telemetry
 
+// domainFromWorkspaceConfig holds the apiUrl value read from .infisical.json during init(),
+// so that PersistentPreRun can print an informational message about it.
+var domainFromWorkspaceConfig string
+
+// workspaceConfigApiUrlMalformed is set during init() when .infisical.json contains a
+// non-empty apiUrl that does not begin with http:// or https://.
+var workspaceConfigApiUrlMalformed bool
+
 var RootCmd = &cobra.Command{
 	Use:               "infisical",
 	Short:             "Infisical CLI is used to inject environment variables into any process",
@@ -94,7 +102,7 @@ func init() {
 	cobra.OnInitialize(initLog)
 	RootCmd.PersistentFlags().StringP("log-level", "l", "", "log level (trace, debug, info, warn, error, fatal)")
 	RootCmd.PersistentFlags().Bool("telemetry", true, "Infisical collects non-sensitive telemetry data to enhance features and improve user experience. Participation is voluntary")
-	RootCmd.PersistentFlags().StringVar(&config.INFISICAL_URL, "domain", fmt.Sprintf("%s/api", util.INFISICAL_DEFAULT_US_URL), "Point the CLI to your Infisical instance (e.g., https://eu.infisical.com for EU Cloud, or https://your-instance.com for self-hosted). Can also set via INFISICAL_API_URL environment variable. Required for non-US Cloud users.")
+	RootCmd.PersistentFlags().StringVar(&config.INFISICAL_URL, "domain", fmt.Sprintf("%s/api", util.INFISICAL_DEFAULT_US_URL), "Point the CLI to your Infisical instance (e.g., https://eu.infisical.com for EU Cloud, or https://your-instance.com for self-hosted). Can also set via INFISICAL_API_URL environment variable or the 'apiUrl' field in .infisical.json. Required for non-US Cloud users.")
 	RootCmd.PersistentFlags().Bool("silent", false, "Disable output of tip/info messages. Useful when running in scripts or CI/CD pipelines.")
 	RootCmd.PersistentPreRun = func(cmd *cobra.Command, args []string) {
 		silent, err := cmd.Flags().GetBool("silent")
@@ -104,6 +112,12 @@ func init() {
 
 		config.INFISICAL_URL = util.AppendAPIEndpoint(config.INFISICAL_URL)
 
+		if workspaceConfigApiUrlMalformed {
+			util.PrintWarningWithWriter("The 'apiUrl' field in .infisical.json is not a valid URL (must start with http:// or https://). It will be ignored.", cmd.ErrOrStderr())
+		} else if domainFromWorkspaceConfig != "" && !silent {
+			fmt.Fprintf(cmd.ErrOrStderr(), "[INFO] Using domain '%s' from .infisical.json\n", domainFromWorkspaceConfig)
+		}
+
 		// util.DisplayAptInstallationChangeBannerWithWriter(silent, cmd.ErrOrStderr())
 		if !util.IsRunningInDocker() && !silent && !isStructuredOutputRequested(cmd) {
 			util.CheckForUpdateWithWriter(cmd.ErrOrStderr())
@@ -121,11 +135,18 @@ func init() {
 
 	}
 
-	// if config.INFISICAL_URL is set to the default value, check if INFISICAL_URL is set in the environment
-	// this is used to allow overrides of the default value
+	// Override the default domain if the --domain flag was not explicitly set.
+	// Priority order (highest to lowest): --domain flag > INFISICAL_API_URL env var > .infisical.json apiUrl field > default
 	if !RootCmd.Flag("domain").Changed {
 		if envInfisicalBackendUrl, ok := os.LookupEnv("INFISICAL_API_URL"); ok {
 			config.INFISICAL_URL = util.AppendAPIEndpoint(envInfisicalBackendUrl)
+		} else if workspaceConfig, err := util.GetWorkSpaceFromFile(); err == nil && workspaceConfig.ApiUrl != "" {
+			if strings.HasPrefix(workspaceConfig.ApiUrl, "http://") || strings.HasPrefix(workspaceConfig.ApiUrl, "https://") {
+				config.INFISICAL_URL = util.AppendAPIEndpoint(workspaceConfig.ApiUrl)
+				domainFromWorkspaceConfig = workspaceConfig.ApiUrl
+			} else {
+				workspaceConfigApiUrlMalformed = true
+			}
 		}
 	}
 
diff --git a/packages/models/cli.go b/packages/models/cli.go
index 0a427f73..4a0d9320 100644
--- a/packages/models/cli.go
+++ b/packages/models/cli.go
@@ -112,6 +112,7 @@ type WorkspaceConfigFile struct {
 	WorkspaceId                   string            `json:"workspaceId"`
 	DefaultEnvironment            string            `json:"defaultEnvironment"`
 	GitBranchToEnvironmentMapping map[string]string `json:"gitBranchToEnvironmentMapping"`
+	ApiUrl                        string            `json:"apiUrl,omitempty"`
 }
 
 type SymmetricEncryptionResult struct {
diff --git a/packages/util/config_test.go b/packages/util/config_test.go
new file mode 100644
index 00000000..ecc958c0
--- /dev/null
+++ b/packages/util/config_test.go
@@ -0,0 +1,38 @@
+package util
+
+import (
+	"testing"
+)
+
+func TestGetWorkspaceConfigByPath_WithApiUrl(t *testing.T) {
+	cfg, err := GetWorkspaceConfigByPath("testdata/infisical-with-api-url.json")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if cfg.WorkspaceId != "test-workspace-id" {
+		t.Errorf("expected workspaceId 'test-workspace-id', got '%s'", cfg.WorkspaceId)
+	}
+	if cfg.ApiUrl != "https://custom.infisical.com/api" {
+		t.Errorf("expected apiUrl 'https://custom.infisical.com/api', got '%s'", cfg.ApiUrl)
+	}
+}
+
+func TestGetWorkspaceConfigByPath_WithoutApiUrl(t *testing.T) {
+	cfg, err := GetWorkspaceConfigByPath("testdata/infisical-default-env.json")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if cfg.ApiUrl != "" {
+		t.Errorf("expected empty apiUrl, got '%s'", cfg.ApiUrl)
+	}
+}
+
+func TestGetWorkspaceConfigByPath_WithMalformedApiUrl(t *testing.T) {
+	cfg, err := GetWorkspaceConfigByPath("testdata/infisical-with-malformed-api-url.json")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if cfg.ApiUrl != "not-a-valid-url" {
+		t.Errorf("expected apiUrl 'not-a-valid-url', got '%s'", cfg.ApiUrl)
+	}
+}
diff --git a/packages/util/testdata/infisical-with-api-url.json b/packages/util/testdata/infisical-with-api-url.json
new file mode 100644
index 00000000..3ec1602e
--- /dev/null
+++ b/packages/util/testdata/infisical-with-api-url.json
@@ -0,0 +1,6 @@
+{
+    "workspaceId": "test-workspace-id",
+    "defaultEnvironment": "dev",
+    "gitBranchToEnvironmentMapping": null,
+    "apiUrl": "https://custom.infisical.com/api"
+}
diff --git a/packages/util/testdata/infisical-with-malformed-api-url.json b/packages/util/testdata/infisical-with-malformed-api-url.json
new file mode 100644
index 00000000..0ee9fd0e
--- /dev/null
+++ b/packages/util/testdata/infisical-with-malformed-api-url.json
@@ -0,0 +1,6 @@
+{
+    "workspaceId": "test-workspace-id",
+    "defaultEnvironment": "dev",
+    "gitBranchToEnvironmentMapping": null,
+    "apiUrl": "not-a-valid-url"
+}