Built for BuildAnything Spark Hackathon on Monad

DEAD Subscription
KILLER

Scan your wallet. Find forgotten crypto subscriptions. Cancel them on Monad for $0.001 instead of $50 on Ethereum.

41
Known Protocols
8
MCP Tools
$0.001
Gas per Cancel
10K
Monad TPS

The Problem

You have active token approvals you forgot about. They are silently draining your wallet every month.

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$50 to Cancel on Ethereum

Cancelling a single token approval costs $20-50 in gas. Most people just leave them active.

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Forgotten Approvals

You approved Uniswap 6 months ago. That approval is still active. Anyone who exploits that contract can drain your tokens.

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No Tooling for AI Agents

There is no MCP server that lets AI agents scan wallets and manage subscriptions. Until now.

How It Works

Four steps from bleeding money to saving it.

01
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Connect Wallet

MetaMask, Rainbow, any Web3 wallet. We never touch your keys.

02
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Scan Onchain

We read Approval events from the blockchain. Find every active approval.

03
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Kill Subscriptions

Select the ones you forgot about. Batch cancel in one click.

04
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Save Money

Track your savings. On Monad it costs $0.001 per cancel. Not $50.

Why Monad?

Batch cancelling 10 subscriptions costs $500 on Ethereum. On Monad: $0.01.

Ethereum

$500
10 cancels x $50 gas
12 min finality
15 TPS

Monad

$0.01
10 cancels x $0.001 gas
<1s finality
10,000 TPS

MCP Server for AI Agents

The first MCP server for blockchain subscription management. Let Claude, Cursor, or any AI agent scan wallets and manage approvals.

sub-killer-mcp

An MCP (Model Context Protocol) server that exposes blockchain scanning tools to AI agents. Works with Claude Desktop, Cursor, Windsurf, and any MCP-compatible client.

scan_wallet
Scan for active approvals
identify_spender
Identify protocol by address
get_known_protocols
41 known DeFi protocols
check_allowance
Check token allowance
get_contract_stats
Onchain user statistics
get_contract_subscriptions
Subscriptions from contract
estimate_gas_savings
Monad vs Ethereum cost
get_network_info
Monad network details

Features

Everything you need to stop bleeding money to forgotten subscriptions.

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Onchain Scanner

Reads Approval events directly from the blockchain. No centralized database.

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Risk Assessment

Flags unlimited approvals, unknown contracts, and high-risk protocols.

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Batch Cancel

Revoke multiple approvals in a single transaction. One click, done.

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Savings Dashboard

Track how much money you saved over time. See your progress.

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MCP Integration

AI agents can scan wallets via natural language. First of its kind.

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Onchain Contract

Subscription data lives on Monad. Transparent, immutable, verifiable.

Open Source

Both projects are fully open source on GitHub.

๐Ÿ“ฆ dead-subscription-killer

Web app + Solidity smart contract. Scan wallets, find subscriptions, batch cancel on Monad.

Next.js ยท Solidity ยท Tailwind

๐Ÿค– sub-killer-mcp

MCP server for AI agents. 8 tools, 41 known protocols, 3 prompts. Works with Claude, Cursor, Windsurf.

TypeScript ยท MCP SDK ยท viem

Stop Paying for What You Don't Use

Scan your wallet. Kill dead subscriptions. Save money on Monad.

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