diff --git a/skills/last30days/scripts/lib/pipeline.py b/skills/last30days/scripts/lib/pipeline.py
index 830f304..a5caa88 100644
--- a/skills/last30days/scripts/lib/pipeline.py
+++ b/skills/last30days/scripts/lib/pipeline.py
@@ -124,7 +124,9 @@ def available_sources(config: dict[str, Any], requested_sources: list[str] | Non
         available.append("perplexity")
     if requested_sources and "xiaohongshu" in requested_sources and env.is_xiaohongshu_available(config):
         available.append("xiaohongshu")
-    if env.is_threads_available(config):
+    if env.is_threads_available(config) or (
+        requested_sources and "threads" in requested_sources and config.get("SCRAPECREATORS_API_KEY")
+    ):
         available.append("threads")
     if requested_sources and "pinterest" in requested_sources and env.is_pinterest_available(config):
         available.append("pinterest")
diff --git a/tests/test_cli_v3.py b/tests/test_cli_v3.py
index 9c7d506..72a8c07 100644
--- a/tests/test_cli_v3.py
+++ b/tests/test_cli_v3.py
@@ -77,6 +77,13 @@ class CliV3Tests(unittest.TestCase):
             cli.parse_search_flag("threads, pinterest"),
         )
 
+    def test_explicit_threads_search_uses_scrapecreators_key_without_include_sources(self):
+        available = cli.pipeline.available_sources(
+            {"SCRAPECREATORS_API_KEY": "test-key", "INCLUDE_SOURCES": ""},
+            requested_sources=["threads"],
+        )
+        self.assertIn("threads", available)
+
     def test_parse_search_flag_rejects_invalid_or_empty_inputs(self):
         with self.assertRaises(SystemExit):
             cli.parse_search_flag("unknown")