AI agents use predict.crypto-updown to commit financial operations through Mcp — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool interfaces with Polymarket prediction markets for crypto/financial instruments (BTC, ETH, SPX), and the server explicitly settles calls in USDC cryptocurrency. Using this tool involves financial transactions on prediction markets, constituting real financial commitments. Misuse could lead to unwanted financial positions or repeated USDC charges per call.
From the tool's definition Polymarket crypto up/down markets (BTC/ETH/SPX hourly-daily directional) — combined with server description 'pay-per-call tools settled in USDC on Base or Solana via x402'
Attacks that exploit this kind of access
Polymarket crypto up/down markets (BTC/ETH/SPX hourly-daily directional). It is categorised as a Financial tool in the Mcp MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the MCP server in PolicyLayer and add a rule for predict.crypto-updown: 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 Mcp. Nothing to install.
predict.crypto-updown is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the predict.crypto-updown 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 predict.crypto-updown. 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.
predict.crypto-updown is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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