Start or check a local anvil-zksync development node. Supports forking from mainnet/testnet. Default port: 8011.
Part of the Foundry Zksync server.
Free to start. No card required.
AI agents invoke anvil_zksync to trigger processes or run actions in Foundry Zksync. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
anvil_zksync can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"anvil_zksync": {
"limits": [
{
"counter": "anvil_zksync_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Foundry Zksync policy for all 21 tools.
These attack patterns abuse exactly the kind of access anvil_zksync gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Start or check a local anvil-zksync development node. Supports forking from mainnet/testnet. Default port: 8011.. It is categorised as a Execute tool in the Foundry Zksync MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Foundry Zksync MCP server in PolicyLayer and add a rule for anvil_zksync: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Foundry Zksync. Nothing to install.
anvil_zksync is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the anvil_zksync rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for anvil_zksync. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
anvil_zksync is provided by the Foundry Zksync MCP server (foundry-zksync-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 21 Foundry Zksync tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.