get_historical_prices

A read tool on the REI Crypto MCP server.

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-historical-prices.md

WHAT IT DOES

What get_historical_prices does on REI Crypto MCP Server

AI agents call get_historical_prices 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_historical_prices is rated Low

This tool retrieves historical cryptocurrency price data without modifying, deleting, or executing any operations. It has no financial transaction capability and no side effects. It is a standard data retrieval function typical of crypto data APIs. Severity is low due to minimal blast radius—misuse would only result in querying historical data without any destructive or financial impact.

From the tool's definition Tool name 'get_historical_prices' indicates a retrieval operation. The server description states it provides 'API access to DefiLlama Pro, CoinGecko Pro, and Arkham Intelligence for crypto data retrieval.' The sibling tools (get_balances_address,…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_historical_prices 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_historical_prices, this is the rule to start with:

get_historical_prices Allowed

get_historical_prices 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_historical_prices": {}
  }
}

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_historical_prices call is checked against it from then on.

FAQ

Questions about get_historical_prices

What does the get_historical_prices tool do? +

get_historical_prices is a read tool on the REI Crypto MCP Server MCP server. 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_historical_prices? +

Register the REI Crypto MCP Server MCP server in PolicyLayer and add a rule for get_historical_prices: 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_historical_prices? +

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

Can I rate-limit get_historical_prices? +

Yes. Add a rate_limit block to the get_historical_prices 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_historical_prices completely? +

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

get_historical_prices 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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