diff --git a/MEV_on_Ethereum/mempool.md b/MEV_on_Ethereum/mempool.md
index fa5e9f8..1c279a0 100644
--- a/MEV_on_Ethereum/mempool.md
+++ b/MEV_on_Ethereum/mempool.md
@@ -12,6 +12,15 @@
 * if someone pays a higher gas price, their modification will be included a block first.
 
 
+<br>
+
+##### watching the mempool 
+
+* [bloXroute, via websockets](https://bloxroute.com/pricing/)
+* [blocknative, via webshooks](https://www.blocknative.com/)
+* [alchemy api endpoint](https://docs.alchemy.com/)
+
+
 <br>
 
 ---