market_get_fear_greed_current

THE RISK

Low Risk

Why market_get_fear_greed_current needs a policy

This tool only reads and returns a publicly available market sentiment index (0-100 scale). It has no side effects, does not create, modify, delete, or execute any operations. It poses minimal security risk as it merely queries existing data without the ability to influence systems or move assets.

From the tool's definition Tool name 'market_get_fear_greed_current' and description indicate it retrieves the current Crypto Fear & Greed Index value.

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

POLICY

How to control market_get_fear_greed_current

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 market_get_fear_greed_current:

policy.json

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

market_get_fear_greed_current 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.

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EXPLORE

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FAQ

Questions about market_get_fear_greed_current

What does the market_get_fear_greed_current tool do? +

Get the current Crypto Fear & Greed Index (0-100 scale: 0-24 Extreme Fear, 25-49 Fear, 50-74 Greed, 75-100 Extreme Greed). 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 market_get_fear_greed_current? +

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

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

Can I rate-limit market_get_fear_greed_current? +

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

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

market_get_fear_greed_current 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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