Crypto Checker

Wallet balance checker via DeBank — supports 100+ chains, DeFi protocols, mnemonic & private key derivation. No API key required.

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Features

• Derives wallet addresses from BIP-39 mnemonics or raw private keys
• Checks balances by intercepting DeBank browser responses
• Supports 100+ chains and DeFi protocol breakdown
• Interactive mode selection from console (wallet source + fetch mode)
• Parallel processing with multi-browser and multi-tab concurrency
• Filters results by minimum balance
• Saves output to timestamped files in Result/

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Requirements

• Node.js v18 or higher
• npm (comes with Node.js)

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Installation

1. Navigate into the folder

cd "Crypto Checker"

2. Install dependencies

npm install

3. Install Playwright browser

npx playwright install chromium

Only Chromium is needed (~150MB download).

4. Add your wallets

Mnemonics — create mnemonics.txt, one phrase per line:

word1 word2 word3 ... word12
word1 word2 word3 ... word12

Private keys — create privatekey.txt, one key per line:

0xabc123...
0xdef456...

5. Configure .env (optional)

# Number of addresses to derive per mnemonic
DERIVE_COUNT=1
DERIVE_PATH=m/44'/60'/0'/0

# Currency
CURRENCY=usd

# Only save wallets with balance above this value (USD)
MIN_BALANCE=1

# Concurrency
BROWSER_COUNT=2
CONCURRENCY=3

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Usage

Interactive mode — mnemonic or private key file

node index.js
# or
npm start

You will be prompted to select:

1. Wallet source (mnemonics.txt or privatekey.txt)
2. Fetch mode (Balance, Balance by Chain, or Balance DeFi)

Console will show invalid mnemonic count and total valid wallets before starting.

Output files are saved to Result/ with format: grand-total-defi-8-6-2026-02.04.58.txt

Single address mode

node index.js --address 0x4d26f0e78c154f8fda7acf6646246fa135507017

You will be prompted to select fetch mode only.

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Fetch Modes

#	Mode	Description
1	Balance	Balance across all chains
2	Balance by Chain	Balance broken down per chain
3	Balance DeFi	Balance + per-protocol DeFi breakdown

Mode 1 — Balance

─────────────────────────────────────────────
Mnemonic : word1 word2 ... word12
PrivKey  : 0xabc123...
Address  : 0x7cad...e18
WALLET      $18.43
DeFi        $27.81
BALANCE     $46.24
─────────────────────────────────────────────

Mode 2 — Balance by Chain

──────────────────────────────────────────────────
Mnemonic : word1 word2 ... word12
PrivKey  : 0xabc123...
Address  : 0x7cad...e18
BALANCE BY CHAIN
eth      $21.14
arb      $14.37
op       $8.92
base     $3.61
matic    $1.20
BALANCE  $49.24
──────────────────────────────────────────────────

Mode 3 — Balance DeFi

────────────────────────────────────────────────────
Mnemonic : word1 word2 ... word12
PrivKey  : 0xabc123...
Address  : 0x7cad...e18
WALLET             $18.43
PROTOCOL / DeFi
Aave V3            $15.22
Uniswap V3         $9.44
Curve              $3.15
DeFi               $27.81
Protocol count     3
BALANCE            $46.24
────────────────────────────────────────────────────

See Result/example-*.txt for full example output files.

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Concurrency Guide

BROWSER COUNT	CONCURRENCY	Parallel	Notes
1	1	1	Safest, slowest
1	3	3	Good default
2	3	6	Fast, low risk
3	3	9	Faster, may hit rate limits
3	5	15	Aggressive, use with caution

Start with BROWSER COUNT=2 and CONCURRENCY=3. Increase gradually if stable.

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Project Structure

Crypto Checker/
├── index.js              ← entry point
├── src/
│   └── checker.js        ← core logic
├── .env                  ← configuration
├── mnemonics.txt         ← list of mnemonics (one per line)
├── privatekey.txt        ← list of private keys (one per line)
└── Result/               ← output files saved here

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Donate

If this tool has been useful, consider sending a tip:

ETH : 0x134991f6A3f2F166383bA6B26a6a232e5729e46e
BTC : bc1qnjlsdaq9egzzdsuq5l2s55698607g7jfrp6vqf
SOL : 46V4wFh4EcpgUsYegkmzv3dC7NXTkcoZhVFNTTTCSbZz
TG : t.me/FIREFLY2X2 · @Lmangoo

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Troubleshooting

File not found: mnemonics.txt → Create the file in the Crypto Checker/ folder and add your mnemonics.

npx playwright install fails
→ Make sure Node.js 18+ is installed.
→ macOS/Linux: try with sudo npx playwright install chromium
→ Windows: run Command Prompt or PowerShell as Administrator, then retry

All wallets show $0.00 → DeBank may be rate-limiting. Lower CONCURRENCY and BROWSER_COUNT, or wait a few minutes before retrying.

Browser crashes or hangs → Set BROWSER_COUNT=1 and CONCURRENCY=1 to isolate the issue.

[ERROR] Unknown argument → Use the correct format: node index.js --address 0x...