market_get_news_sources

WHAT IT DOES

What market_get_news_sources does on Sperax Ecosystem Crypto & DeFI MCP Server

AI agents call market_get_news_sources 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 market_get_news_sources needs a policy

This tool retrieves informational data about available news sources. It has no side effects, does not modify data, does not execute code or commands, and does not involve financial transactions. It is a straightforward read operation with minimal security risk.

From the tool's definition Tool name 'market_get_news_sources' and description 'Get available cryptocurrency news sources' indicate a retrieval operation that queries and returns a list of news sources with no modifications to data or execution of external operations.

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

POLICY

How to control market_get_news_sources

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_news_sources:

policy.json

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

market_get_news_sources 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_news_sources

What does the market_get_news_sources tool do? +

Get available cryptocurrency news sources. 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_news_sources? +

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

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

Can I rate-limit market_get_news_sources? +

Yes. Add a rate_limit block to the market_get_news_sources 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_news_sources completely? +

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

market_get_news_sources 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.