eth_getBalance

Retrieves the balance of a given Ethereum address

SERVEREthereum RPC MCP Server SOURCE0xkoda/eth-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade A, identity unverified Pull the record →

This record as markdown: /tools/0xkoda-eth-mcp/eth-getbalance.md

WHAT IT DOES

What eth_getBalance does on Ethereum RPC MCP Server

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

RISK

Why eth_getBalance is rated Low

This tool only retrieves data about an Ethereum address balance without modifying, executing, deleting, or transferring any assets. It is a read-only operation analogous to checking an account balance, presenting minimal security risk even if misused by an AI agent.

From the tool's definition Tool name 'eth_getBalance' and description 'Retrieves the balance of a given Ethereum address' indicate a query operation with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs eth_getBalance safely

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

eth_getBalance Allowed

eth_getBalance 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": {
    "eth_getBalance": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Ethereum RPC MCP Server, apply this rule, and every eth_getBalance call is checked against it from then on.

FAQ

Questions about eth_getBalance

What does the eth_getBalance tool do? +

Retrieves the balance of a given Ethereum address. It is categorised as a Read tool in the Ethereum RPC MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on eth_getBalance? +

Register the Ethereum RPC MCP Server MCP server in PolicyLayer and add a rule for eth_getBalance: 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 Ethereum RPC MCP Server. Nothing to install.

What risk level is eth_getBalance? +

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

Can I rate-limit eth_getBalance? +

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

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

eth_getBalance is provided by the Ethereum RPC MCP Server MCP server (0xkoda/eth-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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