CEX Reserve Tracker — Exchange Wallet Balances (BTC/ETH)

CEX Reserve Tracker — Exchange Proof of Reserves Monitor

Monitor CEX reserve tracker data for Binance, Coinbase, Kraken, Bitfinex, OKX, and Bybit. Track exchange proof of reserves across ETH, USDT, USDC, WBTC, and DAI on-chain wallets. Spot crypto exchange BTC reserve changes before the market does. No API key required — runs on Apify infrastructure in under a minute.

Exchange reserves are the most-watched macro signal in crypto. Institutional desks, hedge funds, and on-chain analysts treat reserve flows as leading indicators of price moves. This Actor delivers structured reserve snapshots via Apify's reliable cloud execution — no DevOps, no rate-limit headaches, no scraping setup.

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What does CEX Reserve Tracker do?

The CEX reserve tracker queries on-chain Ethereum wallets belonging to major centralized exchanges and returns the current balance per wallet and asset in both native units and USD. It covers six exchanges (Binance, Coinbase, Kraken, Bitfinex, OKX, Bybit) across five assets (ETH, USDT, USDC, WBTC, DAI), producing a clean dataset you can schedule, store, and diff to build your own reserve time-series. Apify's always-on scheduling means you never miss a data point — the platform handles retries, logging, and dataset storage automatically.

Running on Apify also means you get a shareable dataset URL after every run, making it trivial to pipe results into Google Sheets, Slack, dashboards, or your own database without hosting any infrastructure.

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Why use CEX Reserve Tracker?

• Solvency early-warning. Rapidly falling BTC or ETH reserves at a single exchange — without a corresponding price rally — is the canonical pre-insolvency signal. FTX, Celsius, and Voyager all showed reserve drain weeks before collapse.
• Stablecoin inflow = buy-wall building. When USDT/USDC reserves across major exchanges grow consistently, sidelined capital is entering. This is a bullish macro signal used by crypto prop desks globally.
• ETF custody flows. Coinbase Institutional is the primary custodian for US spot Bitcoin ETFs. Tracking Coinbase ETH/BTC reserves helps proxy institutional custody demand.
• Whale withdrawal detection. Sudden large outflows from a single wallet on a known cold-wallet cluster signal OTC block trades or self-custody moves by large holders.
• Macro dashboard component. Pair with the Crypto ETF Flow Tracker and Smart Money Wallet Tracker to build a complete institutional flow picture.

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How to use CEX Reserve Tracker

1. Go to the Actor page on Apify Store and click Try for free.
2. Leave all inputs at their defaults for a full snapshot — all six exchanges, all five assets.
3. Click Start and wait approximately 30–60 seconds for the run to complete.
4. Open the Dataset tab to view results as JSON or CSV, or copy the dataset API URL for programmatic access.
5. To monitor continuously, click Schedule in the Actor header and set a daily or hourly cron — Apify stores every run's dataset automatically, giving you a free time-series archive.

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Input

Field	Type	Default	Description
exchanges	array	all	Subset of Binance, Coinbase, Kraken, Bitfinex, OKX, Bybit
assets	array	all	Subset of ETH, USDT, USDC, WBTC, DAI
minBalanceUsd	integer	1000000	Skip wallets with balance below this USD threshold
sortBy	string	balance_usd_desc	balance_usd_desc, exchange_asset, asset_only
limit	integer	200	Maximum rows returned

Example — Binance + Coinbase stablecoin focus:

{"exchanges": ["Binance", "Coinbase"], "assets": ["USDT", "USDC"]}

Example — Full daily ETL snapshot:

{"sortBy": "exchange_asset", "minBalanceUsd": 0, "limit": 500}

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Output

Each row represents one wallet-asset balance measurement:

[
  {
    "exchange": "Binance",
    "asset": "USDT",
    "wallet_label": "Binance 8 (Cold)",
    "wallet_address": "0xf977814e90da44bfa03b6295a0616a897441acec",
    "balance_native": 19967378227.0,
    "balance_usd": 19967378227.00,
    "price_used_usd": 1.0
  },
  {
    "exchange": "Coinbase",
    "asset": "ETH",
    "wallet_label": "Coinbase Prime Cold",
    "wallet_address": "0x503828976d22510aad0201ac7ec88293211d23da",
    "balance_native": 312041.5,
    "balance_usd": 1185517700.0,
    "price_used_usd": 3799.10
  }
]

A SUMMARY record is also saved to the key-value store with per-exchange and per-asset totals.

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Data fields

Field	Type	Description
exchange	string	Exchange name (Binance, Coinbase, etc.)
asset	string	Token symbol (ETH, USDT, USDC, WBTC, DAI)
wallet_label	string	Human-readable label for the cold/hot wallet
wallet_address	string	Ethereum wallet address
balance_native	float	Balance in native token units
balance_usd	float	Balance converted to USD at price_used_usd
price_used_usd	float	USD price used for conversion (from CoinGecko)

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Cost estimation

This Actor uses Pay-Per-Event (PPE) pricing at $0.001 per (wallet × asset) row returned.

Scenario	Approximate rows	Estimated cost
Single exchange, 1 asset (~3 wallets)	~3 rows	free (first 10 rows free)
One exchange, all 5 assets (~15 rows)	~15 rows	~$0.005
Full snapshot — 6 exchanges × ~3 wallets × 5 assets	~90 rows	~$0.08
Daily schedule × 30 days (full snapshot)	~2,700 rows/month	~$2.70/month

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FAQ

Q: How accurate is the wallet list? The wallets are sourced from publicly documented exchange cold/hot wallet clusters (Arkham Intelligence, Nansen labels, official attestation reports). They cover the majority of on-chain reserves but are not exhaustive — some exchange reserves sit in unlabeled or private wallets.

Q: Does this cover BTC native chain or Solana? No. Only Ethereum L1 wallets are scanned. BSC, Solana, Tron, and BTC native chain reserves are not included in this version.

Q: Can I get historical time-series data? The Actor returns a snapshot for each run. Schedule it daily (or hourly) and Apify stores every run's dataset — query across multiple dataset IDs to reconstruct a time-series. Each dataset URL is permanent.

Disclaimer: Reserve data is informational only. Wallet lists are based on publicly available labels and may not reflect the full reserve picture. This is not financial advice.

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Live Sample Run

A real run with default settings (2026-06-10):

Field	Value
Dataset (JSON)	https://api.apify.com/v2/datasets/OWU4mBUMugpxfTDCI/items?clean=1&format=json
Dataset (CSV)	https://api.apify.com/v2/datasets/OWU4mBUMugpxfTDCI/items?clean=1&format=csv
Run summary (KVS)	https://api.apify.com/v2/key-value-stores/JDcBEth0cwsnvXs2M/records/SUMMARY
Run details	https://api.apify.com/v2/actor-runs/axMZBMPfmQ35J6Tp3

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Related Actors

• Crypto ETF Flow Tracker — ETF inflows + CEX reserve drops = high-confidence rally signal.
• Smart Money Wallet Tracker — On-chain whale wallet monitoring.
• Stablecoin Depeg Monitor — Pairs with stablecoin reserve trend data.

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