Blockchain MCP Server

A Model Context Protocol (MCP) based blockchain tools server providing Ethereum vanity address generation and Cast command functionality.

- 🎯 Support for specifying address prefix and suffix
- ⚡ Multi-threaded concurrent computation for optimized performance
- 📊 Real-time generation statistics display
- ✅ Address validity verification

- 🔍4byte: Get function signatures from function selectors
- 🔧4byte-decode: Decode ABI-encoded calldata
- 📦abi-encode: ABI encode function parameters
- 🔄abi-decode: ABI decode data

- 📞static-call: Make static calls on any EVM-compatible chain (read-only)
- 💸send-transaction: Send transactions to smart contracts (requires private key)
- 💰get-balance: Query address balance
- 🔗list-chains: List supported chains

Generate Ethereum addresses matching specified conditions

- prefix(optional): Address prefix, excluding 0x
- suffix(optional): Address suffix
- workers(optional): Number of concurrent threads, default 4, max 16
- caseSensitive(optional): Whether case-sensitive, default false

{ "prefix": "1234", "suffix": "abcd", "workers": 8, "caseSensitive": false }

Get function signatures for the given selector

- selector: 4-byte function selector (hexadecimal)

{ "selector": "0xa9059cbb" }

- calldata: ABI-encoded calldata (hexadecimal)

{ "calldata": "0xa9059cbb000000000000000000000000..." }

- types: Parameter types array
- values: Parameter values array

{ "types": ["uint256", "address", "bool"], "values": [1000, "0x1234567890123456789012345678901234567890", true] }

Complete function call ABI encoding (with function selector)

- functionSignature: Function signature
- values: Parameter values array

{ "functionSignature": "transfer(address,uint256)", "values": ["0x1234567890123456789012345678901234567890", 1000] }

- types: Parameter types array
- data: Hexadecimal data to decode

{ "types": ["uint256", "address"], "data": "0x00000000000000000000000000000000000000000000000000000000000003e8" }

List all supported EVM-compatible chains

Query address balance on specified chain

- chain: Chain identifier (e.g., "ethereum", "polygon", "bsc")
- address: Address to query
- blockTag(optional): Block tag, default "latest"

{ "chain": "ethereum", "address": "0x1234567890123456789012345678901234567890" }

Make static calls to smart contracts (read-only operations)

- chain: Chain identifier
- to: Contract address
- data: ABI-encoded function call data
- blockTag(optional): Block tag, default "latest"

{ "chain": "ethereum", "to": "0xA0b86a33E6441068C73f4Ea6cB24b80b52bF97F4", "data": "0x70a08231000000000000000000000000123456789012345678901234567890123456789" }

Send transactions to smart contracts (requires private key)

- chain: Chain identifier
- to: Contract address
- data: ABI-encoded function call data
- value(optional): ETH amount to send (wei)
- gasLimit(optional): Gas limit
- gasPrice(optional): Gas price (wei)
- privateKey: Sender's private key

{ "chain": "sepolia", "to": "0x1234567890123456789012345678901234567890", "data": "0xa9059cbb000000000000000000000000...", "value": "0", "privateKey": "0x..." }

Vanity Address Generation Performance Tips

- Shorter prefixes generate faster
- Suffixes are slightly easier than prefixes
- Recommended to use 4-8 worker threads for optimal performance
- Avoid specifying both long prefix and long suffix simultaneously

- 4 hex characters: seconds to minutes
- 5 hex characters: minutes to tens of minutes
- 6 hex characters: hours
- 7+ characters: may take very long time

- Ethereum: ethereum (Chain ID: 1)
- Polygon: polygon (Chain ID: 137)
- BSC: bsc (Chain ID: 56)
- Arbitrum: arbitrum (Chain ID: 42161)
- Optimism: optimism (Chain ID: 10)
- Avalanche: avalanche (Chain ID: 43114)
- Fantom: fantom (Chain ID: 250)

All networks use public RPC endpoints to ensure stability and accessibility.

- TypeScript: Type-safe JavaScript
- MCP SDK: Model Context Protocol implementation
- Ethers.js: Ethereum library
- Node.js Worker Threads: Multi-threaded concurrent computation
- 4byte.directory API: Function signature database

- Generated private keys have complete control over assets
- Always keep private keys secure and never share them with anyone
- Recommend generating important addresses in offline environments
- This tool is for learning and testing purposes only

You can install this MCP server globally:

{ "mcpServers": { "blockchain": { "command": "npx", "args": ["blockchain-mcp-server"] } } }

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