🦊 MiMo Wallet Tracker

Unified Multi-Chain EVM Wallet Intelligence Dashboard — 100% Client-Side, No API Key, No Backend

🔗 Live: https://gyoomei.github.io/mimo-wallet-tracker/

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What Is This?

MiMo Wallet Tracker is a zero-infrastructure dashboard for monitoring EVM wallets across 15 blockchains simultaneously in a single unified view. Paste any wallet address → auto-scan all chains → display balances, tokens, transactions, and AI-powered risk analysis.

No API keys. No backend. No registration. No cost.

The Problem It Solves

Existing wallet trackers typically:

• Require API keys (Etherscan, Alchemy, Infura)
• Support only 1–2 chains per view
• Need backend servers or database
• Charge for real-time data

MiMo Wallet Tracker solves all of this by leveraging the Blockscout V2 API — a free, open-source blockchain explorer API with CORS support, allowing direct browser-to-API calls without any proxy or backend.

Features

🔗 Unified Multi-Chain View

One wallet = one entry, tracking all 15 chains simultaneously. A color-coded chain grid shows balance per chain. Chains with holdings are highlighted green. A proportional bar visualizes portfolio distribution.

15 Supported Chains: Ethereum · Base · Arbitrum · Polygon · zkSync · Scroll · Celo · Arbitrum Nova · Filecoin · Mode · Zora · Unichain · Soneium · Redstone · Degen

💰 Real-Time Balance & Token Tracking

• Native coin balance (ETH, POL, CELO, FIL, DEGEN, etc.)
• ERC-20 token holdings grouped by chain
• USD value with live ETH price from Blockscout
• Chain proportion bar (visual portfolio breakdown)

📋 Transaction History

• Transactions from all chains, sorted by time
• Method decoding: transfer, swap, approve, mint, contract interaction
• Status indicators (success / failed / pending)
• Direction tracking (inbound / outbound)
• Per-transaction chain badge

🧠 AI-Powered Risk Analysis (Client-Side)

• Pattern detection: failed transactions, large transfers, token approvals
• Risk scoring: LOW → MEDIUM → HIGH → CRITICAL
• Automated recommendations (e.g. "Review approvals at revoke.cash")
• Chain-by-chain activity breakdown

🔔 Smart Alerts

• Auto-detect large transfers (>1 ETH outbound)
• Failed transaction warnings
• Token approval notifications
• Alert history with severity levels (info / warning / critical)

⚡ Zero Infrastructure

• Pure HTML / CSS / JS — no build step, no framework, no dependencies
• Single file deployment (941 lines)
• GitHub Pages compatible
• localStorage persistence (wallets survive page refresh)
• Auto-refresh every 3 minutes

Architecture

Browser (100% client-side)
├── Wallet Input → Validate 0x address
├── Chain Scanner (parallel batches of 5)
│   ├── Blockscout API → /addresses/{addr}        (balance + metadata)
│   ├── Blockscout API → /addresses/{addr}/transactions  (tx history)
│   └── Blockscout API → /addresses/{addr}/tokens        (ERC-20 holdings)
├── Risk Analyzer → pattern detection + scoring
├── Alert System  → anomaly detection
└── localStorage  → wallet persistence

There is no backend. All logic runs in the user's browser. API calls go directly to Blockscout public endpoints.

Tech Stack

Component	Technology
Frontend	Vanilla HTML / CSS / JS (single file)
API	Blockscout V2 (free, no key, CORS *)
Fonts	Inter + JetBrains Mono (Google Fonts)
Hosting	GitHub Pages (static)
Storage	localStorage
Fetch	Native fetch + AbortController (8s timeout)
Error Handling	Promise.allSettled + try/catch

Key Design Decisions

1. Blockscout over Etherscan — Free, CORS-enabled, no rate limit registration, 18+ chains
2. Single file over framework — Zero dependencies, instant deploy, easy to fork
3. Client-side analysis over server — Privacy-first, no data leaves the browser
4. Parallel batch scanning (5 chains) — Balance between speed and reliability
5. AbortController timeout — Prevents one slow chain from hanging the entire scan
6. Promise.allSettled — One chain failing doesn't block the others

Use Cases

• DeFi users — Monitor portfolio across L1 + L2 chains
• NFT collectors — Track mints and holdings multi-chain
• Security researchers — Analyze wallet activity patterns
• Whale watchers — Monitor large wallets (Vitalik, etc.)
• Builders — Fork and customize for your own needs

Quick Start

1. Open https://gyoomei.github.io/mimo-wallet-tracker/
2. Paste a wallet address (0x...)
3. Click "+ Add"
4. Wait for scanning (~15 seconds)
5. Click a wallet card to view details (transactions, tokens, analysis)

Stats

Metric	Value
Code	941 lines, single HTML file
Chains	15 EVM networks
API Keys	0
Backend	0
Dependencies	0
Cost	$0 (fully free tier)
Scan Time	~15s per wallet (all chains)

API Reference

Uses Blockscout API v2 — completely free, no registration needed.

Endpoints used:

• GET /api/v2/addresses/{address} — Balance, exchange rate, activity flags
• GET /api/v2/addresses/{address}/transactions — Transaction history
• GET /api/v2/addresses/{address}/tokens — ERC-20 token holdings
• GET /api/v2/stats — Network stats + ETH price

License

MIT — Fork it, ship it, make it yours.

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Built with 🦊 by gyoomei