Fetch the full processed orderbook snapshot from the Alpha REST API for a market. Requires ALPHA_API_KEY. Input is the Alpha market ID (UUID), not marketAppId. Returns the same app-keyed snapshot shape as websocket orderbook_changed.orderbook.
AI agents call get_full_orderbook 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.
get_full_orderbook is a data retrieval function that queries the Alpha REST API for market orderbook data. It has no write, delete, or execution semantics; it simply fetches and returns a snapshot. The requirement for API authentication (ALPHA_API_KEY) does not elevate the risk category.
From the tool's definition Tool description states 'Fetch the full processed orderbook snapshot' — a retrieval operation with no side effects. Returns data ('snapshot shape') without modifying or executing anything.
Documented attack patterns abuse exactly the kind of access get_full_orderbook 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_full_orderbook:
{
"version": "1",
"default": "deny",
"tools": {
"get_full_orderbook": {}
}
}get_full_orderbook is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Fetch the full processed orderbook snapshot from the Alpha REST API for a market. Requires ALPHA_API_KEY. Input is the Alpha market ID (UUID), not marketAppId. Returns the same app-keyed snapshot shape as websocket orderbook_changed.orderbook. 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_full_orderbook: 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_full_orderbook 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_full_orderbook 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_full_orderbook. 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_full_orderbook 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.