Fetch all live markets. Returns summary: id, title, marketAppId, prices, volume. Multi-choice markets have an options[] array — use options[].marketAppId for trading, not the parent. Prices (yesPrice/noPrice) are formatted as dollars. Read the agent-guide resource for full data model details.
AI agents call get_live_markets to retrieve information from Alpha Arcade without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries and returns market data (summary information, prices, volume). It does not create, modify, delete, or execute any transactions. The data returned is read-only and informational, used to support market browsing. No financial commitments or irreversible actions occur.
From the tool's definition Tool name 'get_live_markets' and description 'Fetch all live markets. Returns summary: id, title, marketAppId, prices, volume.' — performs data retrieval with no side effects.
Documented attack patterns abuse exactly the kind of access get_live_markets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Alpha Arcade, and nothing reaches the server without passing your rules. This is the rule we recommend for get_live_markets:
{
"version": "1",
"default": "deny",
"tools": {
"get_live_markets": {}
}
}get_live_markets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Fetch all live markets. Returns summary: id, title, marketAppId, prices, volume. Multi-choice markets have an options[] array — use options[].marketAppId for trading, not the parent. Prices (yesPrice/noPrice) are formatted as dollars. Read the agent-guide resource for full data model details. It is categorised as a Read tool in the Alpha Arcade MCP Server, which means it retrieves data without modifying state.
Register the Alpha Arcade MCP server in PolicyLayer and add a rule for get_live_markets: 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 Alpha Arcade. Nothing to install.
get_live_markets 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 get_live_markets 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 get_live_markets. 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.
get_live_markets is provided by the Alpha Arcade MCP server (phara23/alpha-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Alpha Arcade, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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20 Alpha Arcade tools catalogued and risk-classified — across an index of 43,000+ MCP servers.