Get midpoint price for a specific market. The midpoint is the average of best bid and ask. No authentication required.
AI agents call polymarket_get_midpoint to retrieve information from Polymarket MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure data retrieval operation. It queries market pricing information without creating, modifying, deleting, or executing any operations. Even in the context of a trading platform, reading public market data carries minimal risk—an AI agent cannot misuse this to cause harm, data loss, or financial impact.
From the tool's definition Tool retrieves midpoint price data (average of best bid and ask) with no side effects. Description explicitly states 'No authentication required' and no write, execution, or financial transaction capability.
Attacks that exploit this kind of access
Get midpoint price for a specific market. The midpoint is the average of best bid and ask. No authentication required. It is categorised as a Read tool in the Polymarket MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Polymarket MCP Server MCP server in PolicyLayer and add a rule for polymarket_get_midpoint: 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 Polymarket MCP Server. Nothing to install.
polymarket_get_midpoint 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 polymarket_get_midpoint 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 polymarket_get_midpoint. 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.
polymarket_get_midpoint is provided by the Polymarket MCP Server MCP server (Curious-Layer/cl-mcp-polymarket). 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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