How to Track Crypto Whale Transactions Across 9 Blockchains with Python

Why Whale Tracking Matters

When a whale moves $50M of ETH, the market notices. Learning to detect these movements before the price reacts gives you an edge.

Current Market: Fear & Greed Index at 28/100 (Fear)

• 
  Bitcoin ($64,625.44) 📈 +1.1%


• 
  Ethereum ($1,867.74) 📈 +1.2%


• 
  Tether ($1.00) 📈 +0.0%


• 
  BNB ($568.51) 📈 +0.2%


• 
  USDC ($1.00) 📈 +0.0%

What the API Provides

The ChainSight API tracks whale transactions across 9 blockchains:

Quick Start

import httpx



API = "https://chainsight-api.onrender.com"



# Get large ETH transactions

resp = httpx.get(f"{API}/v1/whales/chain/ethereum", params={"min_value": 100000})

for tx in resp.json():

    if "hash" in tx:

        print(f"🐋 {tx['value']} ETH — {tx['from_address'][:12]}...")

Build a Whale Alert Bot

import httpx, asyncio



API = "https://chainsight-api.onrender.com"



async def monitor():

    last_hash = ""

    while True:

        resp = httpx.get(f"{API}/v1/whales/chain/ethereum?min_value=500000")

        txs = resp.json()

        for tx in txs:

            if tx.get("hash") and tx["hash"] != last_hash:

                print(f"🚨 WHALE: {tx['value']} ETH moved!")

                last_hash = tx["hash"]

        await asyncio.sleep(60)



asyncio.run(monitor())

What You Can Build

• 
  Trading bots that react to whale movements


• 
  Portfolio alerts when large wallets move


• 
  Research dashboards tracking smart money


• 
  Risk management tools detecting exchange outflows

Try It Free

The API offers a free tier with no credit card:

curl "https://chainsight-api.onrender.com/v1/whales/chain/ethereum?min_value=100000"

🔗

ChainSight is open source and free. Built by a solo developer.