diff --git a/.gitignore b/.gitignore
index 4b982d0..db0cb9f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 dist
-defi.egg-info
\ No newline at end of file
+defi.egg-info
+defi/__pycache__/
\ No newline at end of file
diff --git a/defi/defi_tools.py b/defi/defi_tools.py
index 9164e75..c8cb5b1 100644
--- a/defi/defi_tools.py
+++ b/defi/defi_tools.py
@@ -158,18 +158,19 @@ def geckoPrice(tokens, quote):
 
 
 
-def geckoList(page=1, per_page=250):
+def geckoList(page=1, per_page=250, ids=None):
     """Returns list of full detail conGecko currency list
     
     Args:
         page (int, optional): number of pages
         per_page (int, optional): number of records per page
+        ids (string, optional): The ids of the coin, comma separated crytocurrency symbols (base). refers to /coins/list
     
     Returns:
         DataFrame: list of full detail conGecko currency list
     """
     url = "https://api.coingecko.com/api/v3/coins/markets"
-    params = {"vs_currency":"usd", "order":"market_cap_desc", "per_page":per_page, "page":page}
+    params = {"vs_currency":"usd", "order":"market_cap_desc", "per_page":per_page, "page":page, "ids":ids}
     r = requests.get(url, params).json()
     df = pd.DataFrame(r)
     df.set_index('symbol', inplace=True)
diff --git a/test/Defi_toolsTestCase.py b/test/Defi_toolsTestCase.py
new file mode 100644
index 0000000..e021fc4
--- /dev/null
+++ b/test/Defi_toolsTestCase.py
@@ -0,0 +1,16 @@
+import unittest
+import defi.defi_tools as dft
+
+class Defi_toolsTestCase(unittest.TestCase):
+    
+    def test_geckoList(self):
+        result = dft.geckoList()
+        self.assertEqual(len(result.index), 250) #default por page
+    
+    def test_geckoListIds(self):
+        result = dft.geckoList(ids="bitcoin,ethereum")
+        self.assertEqual(len(result.index), 2)
+        self.assertEqual(sorted(result['id'].tolist()), ["bitcoin", "ethereum"]) #alphabetically order
+        
+if __name__ == "__main__":
+    unittest.main()
\ No newline at end of file