crypto_top_coins

Get top cryptocurrencies by market cap from CoinGecko.

SERVERUnClick SOURCE@unclick/mcp-server

Low RISK CLASS

Category Read

Parameters 30 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/crypto-top-coins.md

WHAT IT DOES

What crypto_top_coins does on UnClick

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

Parameter	Type	Required
`page`	number	—
`per_page`	number	—
`vs_currency`	string	—

Parameters from the server's own tool schema.

RISK

Why crypto_top_coins is rated Low

This tool performs a read-only query to fetch cryptocurrency market data. It retrieves information (top coins by market cap) from an external API without creating, modifying, deleting, or executing any operations. The action is informational only with no blast radius if misused by an AI agent.

From the tool's definition Tool description states 'Get top cryptocurrencies by market cap from CoinGecko' - a query operation that retrieves and displays data without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crypto_top_coins safely

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

crypto_top_coins Allowed

crypto_top_coins 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_top_coins": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every crypto_top_coins call is checked against it from then on.

FAQ

Questions about crypto_top_coins

What does the crypto_top_coins tool do? +

Get top cryptocurrencies by market cap from CoinGecko. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.

What parameters does crypto_top_coins accept? +

crypto_top_coins accepts 3 parameters: page, per_page, vs_currency. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on crypto_top_coins? +

Register the UnClick MCP server in PolicyLayer and add a rule for crypto_top_coins: 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 UnClick. Nothing to install.

What risk level is crypto_top_coins? +

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

Can I rate-limit crypto_top_coins? +

Yes. Add a rate_limit block to the crypto_top_coins 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_top_coins completely? +

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

crypto_top_coins is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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