getERC20Balance

Get the ERC20 token balance of a wallet

SERVERMCP Ethers Wallet SOURCEcrazyrabbitltc/mcp-ethers-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/crazyrabbitltc-mcp-ethers-server/geterc20balance.md

WHAT IT DOES

What getERC20Balance does on MCP Ethers Wallet

AI agents call getERC20Balance to retrieve information from MCP Ethers Wallet without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why getERC20Balance is rated Low

This tool retrieves blockchain data (token balance) without modifying state, executing code, or moving funds. It is a straightforward read operation on immutable ledger data.

From the tool's definition Tool name is 'getERC20Balance' and description states 'Get the ERC20 token balance of a wallet'—pure query operation with no side effects, no state modification, and no execution of external operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs getERC20Balance safely

PolicyLayer is an MCP gateway: it sits between your AI agents and MCP Ethers Wallet, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For getERC20Balance, this is the rule to start with:

getERC20Balance Allowed

getERC20Balance is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "getERC20Balance": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect MCP Ethers Wallet, apply this rule, and every getERC20Balance call is checked against it from then on.

FAQ

Questions about getERC20Balance

What does the getERC20Balance tool do? +

Get the ERC20 token balance of a wallet. It is categorised as a Read tool in the MCP Ethers Wallet MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on getERC20Balance? +

Register the MCP Ethers Wallet MCP server in PolicyLayer and add a rule for getERC20Balance: 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 MCP Ethers Wallet. Nothing to install.

What risk level is getERC20Balance? +

getERC20Balance is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit getERC20Balance? +

Yes. Add a rate_limit block to the getERC20Balance 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 getERC20Balance completely? +

Set action: deny in the PolicyLayer policy for getERC20Balance. 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 getERC20Balance? +

getERC20Balance is provided by the MCP Ethers Wallet MCP server (crazyrabbitltc/mcp-ethers-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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