gateway_execute_rpc

THE RISK

High Risk

This tool allows execution of arbitrary blockchain RPC operations, which can trigger external smart contracts, modify blockchain state, and execute transactions. While not inherently destructive or financial by itself, RPC calls are a powerful execution primitive that could be weaponized to perform financial transfers, contract interactions, or other state-changing operations depending on the RPC methods invoked.

From the tool's definition Tool name contains 'execute' and description states 'Execute blockchain RPC calls through Tatum'. RPC calls are arbitrary blockchain operations that can include smart contract invocations, state modifications, and transaction submissions.

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

HOW TO CONTROL GATEWAY_EXECUTE_RPC

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gateway_execute_rpc": {
      "limits": [
        {
          "counter": "gateway_execute_rpc_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

gateway_execute_rpc stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in BNB Chain MCP → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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FAQ

What does the gateway_execute_rpc tool do? +

Execute blockchain RPC calls through Tatum. It is categorised as a Execute tool in the BNB Chain MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on gateway_execute_rpc? +

Register the BNB Chain MCP server in PolicyLayer and add a rule for gateway_execute_rpc: 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 BNB Chain MCP. Nothing to install.

What risk level is gateway_execute_rpc? +

gateway_execute_rpc is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit gateway_execute_rpc? +

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

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

gateway_execute_rpc is provided by the BNB Chain MCP server (nirholas/bnbchain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every BNB Chain MCP tool call.

Deterministic rules across all 1240 BNB Chain MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN BNB CHAIN →

Free to start. No card required.

1240 BNB Chain MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT GATEWAY_EXECUTE_RPC ON BNB CHAIN MCP DOES

// THE RISK

// HOW TO CONTROL GATEWAY_EXECUTE_RPC

// EXPLORE