calculate_negative_volume_index

WHAT IT DOES

What calculate_negative_volume_index does on Sperax Ecosystem Crypto & DeFI MCP Server

AI agents call calculate_negative_volume_index to retrieve information from Sperax Ecosystem Crypto & DeFI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why calculate_negative_volume_index needs a policy

This tool retrieves and processes existing OHLCV (Open, High, Low, Close, Volume) time-series data to compute a technical analysis indicator. It performs no state changes, executes no code beyond calculation, and initiates no financial transactions. The operation is read-only analysis, making it the lowest-risk category.

From the tool's definition Tool description states it 'Calculate[s] the Negative Volume Index (NVI) for a given trading pair using Binance OHLCV data' — a pure calculation/analysis operation on historical market data with no write, execute, delete, or financial transaction capabilities.

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

POLICY

How to control calculate_negative_volume_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_negative_volume_index:

policy.json

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

calculate_negative_volume_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

Related tools and policies

More Sperax Ecosystem Crypto & DeFI MCP Server tools

Financial api_ultrade_market_cancel_order Cancel open order Financial api_ultrade_market_cancel_orders Cancel multiple open orders Financial binance_us_cancel_oco Cancel an entire OCO order on Binance.US. Cancelling any individual leg will cancel the en Financial binance_us_cancel_order Cancel an active order on Binance.US. Either orderId or origClientOrderId must be provided Financial binance_us_cancel_replace Cancel an existing order and place a new order on the same symbol atomically. This is usef Financial binance_us_cust_cancel_orders_symbol Cancel all active custodial orders for a specific trading pair. ⚠️ REQUIRES CUSTODIAL SOL Financial BinanceCrossMarginCancelAllOrders Cancel all open orders on a symbol in Cross Margin account. Financial BinanceDeliveryCancelBatchOrders Cancel multiple COIN-M Futures orders in batch (max 10).

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Go deeper

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 →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about calculate_negative_volume_index

What does the calculate_negative_volume_index tool do? +

Calculate the Negative Volume Index (NVI) 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_negative_volume_index? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for calculate_negative_volume_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_negative_volume_index? +

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

Can I rate-limit calculate_negative_volume_index? +

Yes. Add a rate_limit block to the calculate_negative_volume_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_negative_volume_index completely? +

Set action: deny in the PolicyLayer policy for calculate_negative_volume_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_negative_volume_index? +

calculate_negative_volume_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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1318 Sperax Ecosystem Crypto & DeFI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.