diff --git a/token-scanner-api/README.md b/token-scanner-api/README.md
index 0b320e1..fc6c541 100644
--- a/token-scanner-api/README.md
+++ b/token-scanner-api/README.md
@@ -2,7 +2,7 @@
 
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-##### 👉 this project implements a cli tool that indexes transfer events for a particular token, and is deployed to a restful api for fast balance and ownership statistics retrieval. 
+##### 👉 this project implements a cli tool that indexes transfer events for a particular token, and is deployed to a restful api for fast balance and ownership statistics retrieval. it utilizes the [JSON-RPC methods](https://docs.infura.io/infura/networks/ethereum/json-rpc-methods/eth_getlogs) `eth_blockNumber` and `eth_getLogs`.
 
 ##### 📚 more details can be found in my mirror post, **[quant #3: building a scalable event scanner for ethereum](https://mirror.xyz/steinkirch.eth/vSF18xcLyfXLIWwxjreRa3I_XskwgnjSc6pScegNJWI)**.