Returns a Markdown list of all supported chains and their price feed names
AI agents call listSupportedFeeds 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.
This tool performs a simple data retrieval operation—it queries and returns information about supported chains and feeds in a human-readable format. There is no data mutation, code execution, deletion, or financial transaction involved. It is a purely informational query with no blast radius if misused by an AI agent.
From the tool's definition Tool name 'listSupportedFeeds' and description 'Returns a Markdown list of all supported chains and their price feed names' indicate a read-only query operation that retrieves and lists existing data without modification, creation, or side effects.
Documented attack patterns abuse exactly the kind of access listSupportedFeeds 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 listSupportedFeeds:
{
"version": "1",
"default": "deny",
"tools": {
"listSupportedFeeds": {}
}
}listSupportedFeeds is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Returns a Markdown list of all supported chains and their price feed names. 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 listSupportedFeeds: 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.
listSupportedFeeds 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 listSupportedFeeds 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 listSupportedFeeds. 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.
listSupportedFeeds 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.
Free to start. No card required.
5 Chainlink Feeds tools catalogued and risk-classified — across an index of 43,000+ MCP servers.