cast_sig

MCP tool from Foundry MCP Server by PraneshASP

Get the selector for a function or event signature

How to use it

cast_sig is exposed by the Foundry MCP Server MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the cast_sig tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

FULL FOUNDRY MCP SERVER LISTING

Other tools in Foundry MCP Server (26)

Start a new Anvil instance

Check if Anvil is running and get its status

Stop a running Anvil instance

Lookup function or event signature from the 4byte directory

Check the ETH balance of an address

Call a contract function (read-only)

Get information about the current chain

Get logs by signature or topic

Get the transaction receipt

Run a published transaction in a local environment

Send a transaction to a contract function

Read contract storage at a specific slot

compute_address

Compute the address of a contract that would be deployed

Get the bytecode size of a deployed contract

convert_eth_units

Convert between EVM units (wei, gwei, hex)

create_solidity_file

Create or update a Solidity file in the workspace

Estimate the gas cost of a transaction

Run a Forge script from the workspace

Generate visual control flow graph for EVM bytecode

heimdall_decode

Decode raw calldata without requiring ABI

heimdall_decompile

Decompile EVM bytecode to Solidity source code and ABI

heimdall_disassemble

Disassemble EVM bytecode into human-readable opcodes

heimdall_inspect

Detailed inspection of Ethereum transactions

install_dependency

Install a dependency for the Forge workspace

List files in the workspace

Read the content of a file from the workspace