multicall

Batch multiple contract read calls into a single RPC request. Significantly reduces latency and RPC usage when querying multiple functions. Uses the Multicall3 contract deployed on all major networks. Perfect for portfolio analysis, price aggregation, and querying multiple contract states efficie...

ServerEVM MCP Server
CategoryRead

How to control multicall ↓

WHAT IT DOES

What multicall does on EVM MCP Server

AI agents call multicall to retrieve information from EVM MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why multicall needs a policy

Despite operating on blockchain networks, this tool only retrieves data through read operations. It batches contract queries but does not create, modify, delete, execute arbitrary code, or move assets. The tool is purely informational and has no side effects on blockchain state.

From the tool's definition Tool description explicitly states 'contract read calls' and 'querying multiple contract states'. The use case examples—'portfolio analysis, price aggregation'—are all read-only operations.

Documented attack patterns abuse exactly the kind of access multicall gives an agent:

POLICY

How to control multicall

PolicyLayer is an MCP gateway — it sits between your AI agents and EVM MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for multicall:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "multicall": {}
  }
}

multicall is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register EVM MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More EVM MCP Server tools

Financial transfer_erc20 Transfer ERC20 tokens to an address. Uses the configured wallet. Financial transfer_native Transfer native tokens (ETH, MATIC, etc.) to an address. Uses the configured wallet. Financial approve_token_spending Approve a spender (contract) to spend tokens on your behalf. Required before interacting w Execute sign_message Sign an arbitrary message using the configured wallet. Useful for authentication (SIWE), m Execute sign_typed_data Sign structured data (EIP-712) using the configured wallet. Used for gasless transactions, Execute write_contract Execute state-changing functions on a smart contract. Automatically fetches ABI from block Read wait_for_transaction Wait for a transaction to be confirmed (mined). Polls the network until confirmation. Read get_allowance Check the allowance granted to a spender for a token. This tells you how much of a token a

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about multicall

What does the multicall tool do? +

How do I enforce a policy on multicall? +

Register the EVM MCP Server MCP server in PolicyLayer and add a rule for multicall: 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 EVM MCP Server. Nothing to install.

What risk level is multicall? +

multicall is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit multicall? +

Yes. Add a rate_limit block to the multicall 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.

How do I block multicall completely? +

Set action: deny in the PolicyLayer policy for multicall. 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.

What MCP server provides multicall? +

multicall is provided by the EVM MCP Server MCP server (mcpdotdirect/evm-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every EVM MCP Server tool call.

Start from EVM MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

Free to start. No card required.

25 EVM MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.