diff --git a/api/pagination/pagination.go b/api/pagination/pagination.go
index 40bb1ee88d..f595f7b7de 100644
--- a/api/pagination/pagination.go
+++ b/api/pagination/pagination.go
@@ -15,6 +15,9 @@ func StartAndEndPage(pageToken string, pageSize, totalSize int) (int, int, strin
 	if pageToken == "" {
 		pageToken = "0"
 	}
+	if pageSize < 0 || totalSize < 0 {
+		return 0, 0, "", errors.Errorf("invalid page and total sizes provided: page size %d , total size %d", pageSize, totalSize)
+	}
 	if pageSize == 0 {
 		pageSize = params.BeaconConfig().DefaultPageSize
 	}
@@ -23,6 +26,9 @@ func StartAndEndPage(pageToken string, pageSize, totalSize int) (int, int, strin
 	if err != nil {
 		return 0, 0, "", errors.Wrap(err, "could not convert page token")
 	}
+	if token < 0 {
+		return 0, 0, "", errors.Errorf("invalid token value provided: %d", token)
+	}
 
 	// Start page can not be greater than set size.
 	start := token * pageSize
diff --git a/api/pagination/pagination_test.go b/api/pagination/pagination_test.go
index daca9c28ab..c3a7a81a36 100644
--- a/api/pagination/pagination_test.go
+++ b/api/pagination/pagination_test.go
@@ -85,3 +85,19 @@ func TestStartAndEndPage_ExceedsMaxPage(t *testing.T) {
 	_, _, _, err := pagination.StartAndEndPage("", 0, 0)
 	assert.ErrorContains(t, wanted, err)
 }
+
+func TestStartAndEndPage_InvalidPageValues(t *testing.T) {
+	_, _, _, err := pagination.StartAndEndPage("10", -1, 10)
+	assert.ErrorContains(t, "invalid page and total sizes provided", err)
+
+	_, _, _, err = pagination.StartAndEndPage("12", 10, -10)
+	assert.ErrorContains(t, "invalid page and total sizes provided", err)
+
+	_, _, _, err = pagination.StartAndEndPage("12", -50, -60)
+	assert.ErrorContains(t, "invalid page and total sizes provided", err)
+}
+
+func TestStartAndEndPage_InvalidTokenValue(t *testing.T) {
+	_, _, _, err := pagination.StartAndEndPage("-12", 50, 60)
+	assert.ErrorContains(t, "invalid token value provided", err)
+}