diff --git a/acceptance_test.go b/acceptance_test.go
index 4e7735669126d54987095d88404ff6376f9f1109..f84a277c9c7511a568e018811d44049659648cfa 100644
--- a/acceptance_test.go
+++ b/acceptance_test.go
@@ -401,6 +401,7 @@ func TestPrometheusMetricsCanBeScraped(t *testing.T) {
 	require.Contains(t, string(body), "gitlab_pages_domains_updated_total 1")
 	require.Contains(t, string(body), "gitlab_pages_last_domain_update_seconds gauge")
 	require.Contains(t, string(body), "gitlab_pages_domains_configuration_update_duration gauge")
+	require.Contains(t, string(body), "gitlab_pages_domains_source_requests 0")
 	require.Contains(t, string(body), "gitlab_pages_domains_source_cache_hit 0")
 	require.Contains(t, string(body), "gitlab_pages_domains_source_cache_miss 0")
 	require.Contains(t, string(body), "gitlab_pages_serverless_requests 0")
diff --git a/internal/source/gitlab/client/client.go b/internal/source/gitlab/client/client.go
index 59776a8fd9e39835b4f953d0cd7eae673789d9b0..1e083ad972e0dce6193f3c5de5c9194eabf1a88b 100644
--- a/internal/source/gitlab/client/client.go
+++ b/internal/source/gitlab/client/client.go
@@ -15,6 +15,7 @@ import (
 
 	"gitlab.com/gitlab-org/gitlab-pages/internal/httptransport"
 	"gitlab.com/gitlab-org/gitlab-pages/internal/source/gitlab/api"
+	"gitlab.com/gitlab-org/gitlab-pages/metrics"
 )
 
 // Client is a HTTP client to access Pages internal API
@@ -101,6 +102,8 @@ func (gc *Client) get(ctx context.Context, path string, params url.Values) (*htt
 		return nil, err
 	}
 
+	metrics.DomainsSourceRequests.Inc()
+
 	resp, err := gc.httpClient.Do(req)
 	if err != nil {
 		return nil, err
diff --git a/metrics/metrics.go b/metrics/metrics.go
index 1ae527a84874a83f146d850f3ee994561928fbe1..cad558b3ea44bc2e480adb72e1ade54f6eb0c87e 100644
--- a/metrics/metrics.go
+++ b/metrics/metrics.go
@@ -35,6 +35,12 @@ var (
 		Help: "The time (in seconds) it takes to update domains configuration from disk",
 	})
 
+	// DomainsSourceRequests is the number of GitLab API calls
+	DomainsSourceRequests = prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "gitlab_pages_domains_source_requests",
+		Help: "The number of GitLab domains API HTTP requests",
+	})
+
 	// DomainsSourceCacheHit is the number of GitLab API call cache hits
 	DomainsSourceCacheHit = prometheus.NewCounter(prometheus.CounterOpts{
 		Name: "gitlab_pages_domains_source_cache_hit",
@@ -66,6 +72,7 @@ func init() {
 	prometheus.MustRegister(DomainUpdates)
 	prometheus.MustRegister(DomainLastUpdateTime)
 	prometheus.MustRegister(DomainsConfigurationUpdateDuration)
+	prometheus.MustRegister(DomainsSourceRequests)
 	prometheus.MustRegister(DomainsSourceCacheHit)
 	prometheus.MustRegister(DomainsSourceCacheMiss)
 	prometheus.MustRegister(ServerlessRequests)