crypto.fear-greed

SERVERMcp SOURCE@2sio/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-2s-io-mcp/crypto.fear-greed.md

WHAT IT DOES

What crypto.fear-greed does on Mcp

AI agents call crypto.fear-greed to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why crypto.fear-greed is rated Low

This is a read-only data retrieval tool that queries a public sentiment index. No side effects, no state changes, no code execution, no financial transactions (despite the server's pay-per-call USDC settlement, the tool itself does not move money). The contrarian sentiment signal use case is informational only.

From the tool's definition Tool retrieves market sentiment data (Fear & Greed Index with 0-100 scale) and historical values via optional limit parameter.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crypto.fear-greed safely

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

crypto.fear-greed Allowed

crypto.fear-greed 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": {
    "crypto.fear-greed": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every crypto.fear-greed call is checked against it from then on.

FAQ

Questions about crypto.fear-greed

What does the crypto.fear-greed tool do? +

Crypto Fear & Greed Index — 0–100 market sentiment (0 = Extreme Fear, 100 = Extreme Greed), updated daily, with classification. Pass limit (1–90) for recent history. Contrarian sentiment signal. Source: alternative.me. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on crypto.fear-greed? +

Register the MCP server in PolicyLayer and add a rule for crypto.fear-greed: 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 Mcp. Nothing to install.

What risk level is crypto.fear-greed? +

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

Can I rate-limit crypto.fear-greed? +

Yes. Add a rate_limit block to the crypto.fear-greed 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 crypto.fear-greed completely? +

Set action: deny in the PolicyLayer policy for crypto.fear-greed. 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 crypto.fear-greed? +

crypto.fear-greed is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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