Returns a paginated list of all active cryptocurrencies with latest market data.
AI agents call allCryptocurrencyListings to retrieve information from CoinMarketCap MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries cryptocurrency market data without creating, modifying, deleting, executing external operations, or committing financial transactions. It is a straightforward Read operation that presents no misuse risk beyond potentially excessive API consumption.
From the tool's definition Tool returns a paginated list of cryptocurrencies with market data. The verb 'returns' and the read-only nature of 'list' operations indicate pure data retrieval with no side effects.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access allCryptocurrencyListings gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CoinMarketCap MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for allCryptocurrencyListings:
{
"version": "1",
"default": "deny",
"tools": {
"allCryptocurrencyListings": {}
}
}allCryptocurrencyListings is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Returns a paginated list of all active cryptocurrencies with latest market data. It is categorised as a Read tool in the CoinMarketCap MCP MCP Server, which means it retrieves data without modifying state.
Register the CoinMarketCap MCP server in PolicyLayer and add a rule for allCryptocurrencyListings: 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 CoinMarketCap MCP. Nothing to install.
allCryptocurrencyListings is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the allCryptocurrencyListings 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.
Set action: deny in the PolicyLayer policy for allCryptocurrencyListings. 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.
allCryptocurrencyListings is provided by the CoinMarketCap MCP server (shinzo-labs/coinmarketcap-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 51 CoinMarketCap MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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51 CoinMarketCap MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.