Get a list of all available markets on Polymarket with comprehensive filtering options.
AI agents call get_markets to retrieve information from Polymarket without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries market data from Polymarket without modifying, creating, or deleting any information. It is a straightforward data retrieval operation with no capability to execute transactions, modify state, or cause irreversible changes. The filtering capability is for query refinement only, not for side effects.
From the tool's definition Tool description states 'Get a list of all available markets' which is a retrieval operation. The term 'get' combined with 'list' and 'filtering options' indicates querying/listing data with no side effects.
Documented attack patterns abuse exactly the kind of access get_markets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Polymarket, and nothing reaches the server without passing your rules. This is the rule we recommend for get_markets:
{
"version": "1",
"default": "deny",
"tools": {
"get_markets": {}
}
}get_markets 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.
Get a list of all available markets on Polymarket with comprehensive filtering options. It is categorised as a Read tool in the Polymarket MCP Server, which means it retrieves data without modifying state.
Register the Polymarket MCP server in PolicyLayer and add a rule for get_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 Polymarket. Nothing to install.
get_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_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_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_markets is provided by the Polymarket MCP server (pab1it0/polymarket-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Polymarket, 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.
8 Polymarket tools catalogued and risk-classified — across an index of 43,000+ MCP servers.