get_balances_address

GET /balances/address/{address}

SERVERREI Crypto MCP Server SOURCE0xreisearch/crypto-mcp-beta

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade B, identity unverified Pull the record →

This record as markdown: /tools/0xreisearch-crypto-mcp-beta/get-balances-address.md

WHAT IT DOES

What get_balances_address does on REI Crypto MCP Server

AI agents call get_balances_address to retrieve information from REI Crypto 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 get_balances_address is rated Low

This tool retrieves cryptocurrency balance data for a specified blockchain address. While it performs no destructive or write operations, it qualifies as Read with medium severity because: (1) it exposes sensitive financial information about wallet balances that could enable targeting or surveillance of specific addresses, and (2) in an AI agent context, unrestricted balance queries could be abused to enumerate or…

From the tool's definition Tool name 'get_balances_address' and description 'GET /balances/address/{address}' indicate retrieval of balance information for a blockchain address. The GET HTTP method and 'get' prefix confirm read-only data retrieval with no modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_balances_address safely

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

get_balances_address Allowed

get_balances_address 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": {
    "get_balances_address": {}
  }
}

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

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

FAQ

Questions about get_balances_address

What does the get_balances_address tool do? +

GET /balances/address/{address}. It is categorised as a Read tool in the REI Crypto MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_balances_address? +

Register the REI Crypto MCP Server MCP server in PolicyLayer and add a rule for get_balances_address: 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 REI Crypto MCP Server. Nothing to install.

What risk level is get_balances_address? +

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

Can I rate-limit get_balances_address? +

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

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

get_balances_address is provided by the REI Crypto MCP Server MCP server (0xreisearch/crypto-mcp-beta). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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