// MCP TOOL REFERENCE

FOUNDRY ZKSYNC TOOLS

21 tools from the Foundry Zksync MCP Server, categorised by risk level.

View the Foundry Zksync policy → Token cost: 5,440 tokens →

// ALL 21 FOUNDRY ZKSYNC TOOLS

READ 11 tools

Read cast_abi_decode Decode ABI-encoded hex data back into human-readable values (cast abi-decode) Read cast_abi_encode ABI-encode values for a given Solidity function/constructor signature (cast abi-encode) Read cast_balance Query the ETH balance of an address (cast balance) Read cast_call Read-only call to a deployed contract — no gas spent, no state change (cast call) Read cast_calldata_decode Decode raw transaction calldata (with 4-byte selector) into function arguments (cast calldata-decode) Read explain Explain raw output from foundry-zksync: error messages, logs, or transactions. Matches against a knowledge ... Read get_zksync_docs Look up foundry-zksync documentation by topic. Returns URLs to the foundry-zksync book for installation, co... Read read_foundry_toml Read and return the contents of foundry.toml from a project. Useful for inspecting profiles, zkSync config,... Read snapshot Create or compare gas snapshots (forge snapshot --zksync). Use diff=true to compare against existing .gas-s... Read test Run tests in a foundry-zksync project (forge test --zksync). Check foundry.toml for [profile.X] sections — ... Read verify Verify a deployed contract on a block explorer (forge verify-contract --zksync). Supports Etherscan (requir...

WRITE 3 tools

Write cast_send Send a state-changing transaction to a deployed contract (cast send) Write init Scaffold a new foundry project and add [profile.default.zksync] config (forge init) Write install Install dependencies for a foundry project (forge install)

DESTRUCTIVE 1 tools

Destructive clean Remove build artifacts (out/ and zkout/) from a foundry project (forge clean)

EXECUTE 6 tools

Execute anvil_zksync Start or check a local anvil-zksync development node. Supports forking from mainnet/testnet. Default port: ... Execute cast_nonce Query the transaction nonce of an address (cast nonce). Note: on zkSync this returns the TX nonce only, not... Execute compile Compile a foundry-zksync project (forge build --zksync). Check foundry.toml for [profile.X.zksync] sections... Execute deploy Deploy a contract to a zkSync network (forge create --zksync). Returns structured output with contract addr... Execute gas_report Run tests and generate a gas usage report (forge test --zksync --gas-report). Note: zkSync gas values are a... Execute run_script Run a forge script targeting zkSync (forge script --zksync)

// RUNNING THIS SERVER

The managed route: connect Foundry Zksync through the PolicyLayer gateway — every tool call above is checked against your policy before it runs, with a full audit log.

DIRECT INSTALL (UNMANAGED) npx -y foundry-zksync-mcp

// FAQ

How many tools does the Foundry Zksync MCP server have? +

The Foundry Zksync MCP server exposes 21 tools across 4 categories: Read, Write, Destructive, Execute.

How do I enforce policies on Foundry Zksync tools? +

Route the Foundry Zksync server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard — they are enforced on every call before it reaches the server.

What risk categories do Foundry Zksync tools fall into? +

Foundry Zksync tools are categorised as Read (11), Write (3), Destructive (1), Execute (6). Each category has a recommended default policy.

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