Fetches the latest price for a given pair on a specified chain
AI agents call getLatestPrice to retrieve information from Chainlink Feeds without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves real-time pricing data without side effects. It does not create, modify, delete, or execute arbitrary operations. While the data could be used to inform financial decisions, the tool itself only reads information and makes no financial transactions or commitments. Classification as Read is appropriate.
From the tool's definition Tool fetches/retrieves the latest price for a given pair—described as 'Fetches the latest price'—with no modification, deletion, or execution of code. This is a query operation that reads data from Chainlink's decentralized price feeds.
Documented attack patterns abuse exactly the kind of access getLatestPrice gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Chainlink Feeds, and nothing reaches the server without passing your rules. This is the rule we recommend for getLatestPrice:
{
"version": "1",
"default": "deny",
"tools": {
"getLatestPrice": {}
}
}getLatestPrice is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Fetches the latest price for a given pair on a specified chain. It is categorised as a Read tool in the Chainlink Feeds MCP Server, which means it retrieves data without modifying state.
Register the Chainlink Feeds MCP server in PolicyLayer and add a rule for getLatestPrice: 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 Chainlink Feeds. Nothing to install.
getLatestPrice 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 getLatestPrice 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 getLatestPrice. 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.
getLatestPrice is provided by the Chainlink Feeds MCP server (kukapay/chainlink-feeds-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Chainlink Feeds, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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5 Chainlink Feeds tools catalogued and risk-classified — across an index of 43,000+ MCP servers.