Validation MCP Server

A Model Context Protocol (MCP) server providing comprehensive Ethereum address validation, private key validation, checksum conversion, and cryptographic utilities.

Features

Tools (15 total)

1. validate_address - Comprehensive Ethereum address validation with EIP-55 checksum verification
2. validate_private_key - Private key validation with range checking
3. to_checksum_address - Convert any address to EIP-55 checksummed format
4. derive_address_from_private_key - Derive Ethereum address from private key
5. derive_address_from_public_key - Derive address from public key (compressed/uncompressed)
6. validate_signature - Validate ECDSA signature components (v, r, s)
7. validate_hex_data - Validate arbitrary hex data for Ethereum use
8. compare_addresses - Compare two addresses for equality
9. batch_validate_addresses - Validate multiple addresses at once
10. generate_vanity_check - Check if address matches vanity criteria
11. keccak256_hash - Compute Keccak-256 hash
12. encode_function_selector - Encode function signature to 4-byte selector
13. decode_function_selector - Decode selector to function signature
14. validate_ens_name - Validate ENS name format (offline)
15. calculate_storage_slot - Calculate contract storage slot positions

Resources

• validation://eip55-specification - EIP-55 checksum specification
• validation://secp256k1-constants - Curve parameters
• validation://function-selectors-db - Common function selectors (500+)
• validation://address-patterns - Known address patterns
• validation://known-weak-keys - Weak key information

Prompts

• Address validation workflow
• Key security audit
• Data encoding helper
• Contract interaction preparation

Installation

pip install -e .

Usage

As MCP Server

Add to your Claude Desktop configuration:

{
  "mcpServers": {
    "validation-mcp-server": {
      "command": "validation-mcp-server"
    }
  }
}

Example Tool Calls

# Validate an address
result = await validate_address("0x5aaeb6053f3e94c9b9a09f33669435e7ef1beaed")

# Derive address from private key
wallet = await derive_address_from_private_key(
    "0x4c0883a69102937d6231471b5dbb6204fe5129617082792ae468d01a3f362318"
)

# Compute function selector
selector = await encode_function_selector("transfer(address,uint256)")
# Returns: 0xa9059cbb

Security Notes

• Private keys are never logged or persisted
• All sensitive operations clear memory after use
• Uses established cryptographic libraries

License

MIT