calculate_relative_strength_index

THE RISK

Low Risk

Why calculate_relative_strength_index needs a policy

The tool performs a read-only technical indicator calculation on publicly available OHLCV (Open, High, Low, Close, Volume) data. RSI is a momentum oscillator that measures the magnitude of recent price changes to evaluate overbought or oversold conditions. No data is modified, no financial transactions are executed, and no external operations are triggered. It is informational analysis only.

From the tool's definition Tool name is 'calculate_relative_strength_index' and description states it 'Calculate[s] the Relative Strength Index (RSI) for a given trading pair using Binance OHLCV data'.

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

POLICY

How to control calculate_relative_strength_index

PolicyLayer is an MCP gateway — it sits between your AI agents and Sperax Ecosystem Crypto & DeFI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for calculate_relative_strength_index:

policy.json

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

calculate_relative_strength_index is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

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EXPLORE

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The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about calculate_relative_strength_index

What does the calculate_relative_strength_index tool do? +

Calculate the Relative Strength Index (RSI) for a given trading pair using Binance OHLCV data. It is categorised as a Read tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on calculate_relative_strength_index? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for calculate_relative_strength_index: 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 Sperax Ecosystem Crypto & DeFI MCP Server. Nothing to install.

What risk level is calculate_relative_strength_index? +

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

Can I rate-limit calculate_relative_strength_index? +

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

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

calculate_relative_strength_index is provided by the Sperax Ecosystem Crypto & DeFI MCP Server MCP server (sperax/sperax-crypto-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sperax Ecosystem Crypto & DeFI MCP Server tool call.

Start from Sperax Ecosystem Crypto & DeFI MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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