diff --git a/src/world_intel_mcp/vector_store.py b/src/world_intel_mcp/vector_store.py
index 055e4f3..f61d95d 100644
--- a/src/world_intel_mcp/vector_store.py
+++ b/src/world_intel_mcp/vector_store.py
@@ -83,6 +83,33 @@ DOMAIN_CATEGORIES = {
     "webcams": "Infrastructure",
     "sanctions": "Conflict & Security",
     "service-status": "Infrastructure",
+    # Granular source names (from fetcher.get_json source= param)
+    "sans-dshield": "Cyber Threats",
+    "feodo-tracker": "Cyber Threats",
+    "cisa-kev": "Cyber Threats",
+    "urlhaus": "Cyber Threats",
+    "alternative-me": "Financial Markets",
+    "mempool": "Cryptocurrency",
+    "hexdb": "Military & Defense",
+    "nga-msi": "Maritime",
+    "open-meteo": "Climate",
+    "who-don": "Health",
+    "unhcr": "Humanitarian",
+    "hdx": "Humanitarian",
+    "noaa-swpc": "Space Weather",
+    "ofac-sdn": "Conflict & Security",
+    "ioda": "Infrastructure",
+    "ecb-frankfurter": "Financial Markets",
+    "world-bank": "Economics",
+    "eia": "Economics",
+    "fred": "Economics",
+    "hackernews": "AI & Technology",
+    "github": "AI & Technology",
+    "arxiv": "AI & Technology",
+    "usaspending-gov": "Government",
+    "eonet": "Natural Disasters",
+    "gdacs": "Natural Disasters",
+    "reddit": "Social Signals",
 }