Create atlas.py

mcp/atlas.py

@@ -0,0 +1,10 @@
+import httpx
+from functools import lru_cache
+
+_URL = "https://www.ebi.ac.uk/gxa/json/expressionSummary?geneQuery={}"
+
+@lru_cache(maxsize=512)
+async def fetch_expression(sym: str):
+    async with httpx.AsyncClient(timeout=10) as c:
+        r = await c.get(_URL.format(sym))
+        return r.json() if r.status_code == 200 else {}