Use this when you need detailed odds, probabilities, and trading data for a specific prediction market. Searches both Polymarket and Kalshi to find the best match by market ID or question text. 1. question: the full prediction market question text 2. outcomes: array of possible outcomes with thei...
Risk signalsAccepts freeform code/query input (query)
Part of the Prediction Markets API server.
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AI agents call prediction_get_market_odds to retrieve information from Prediction Markets API without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though prediction_get_market_odds only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"prediction_get_market_odds": {}
}
}See the full Prediction Markets API policy for all 3 tools.
These attack patterns abuse exactly the kind of access prediction_get_market_odds gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Use this when you need detailed odds, probabilities, and trading data for a specific prediction market. Searches both Polymarket and Kalshi to find the best match by market ID or question text. 1. question: the full prediction market question text 2. outcomes: array of possible outcomes with their current probabilities 3. outcomePrices: decimal probabilities per outcome (0.72 = 72% implied probability) 4. volume: total all-time trading volume in USD 5. volume24h: trading volume in the last 24 hours 6. liquidity: current depth of the order book in USD 7. endDate: resolution date of the market 8. description: detailed market description and resolution criteria 9. active: whether the market is currently open for trading 10. source: which platform the market is from -- "polymarket" or "kalshi" Example output: { question: "Will ETH flip BTC by 2027?", outcomes: ["Yes", "No"], outcomePrices: { "Yes": 0.08, "No": 0.92 }, volume: 2340000, volume24h: 45000, liquidity: 120000, endDate: "2027-12-31", active: true, source: "polymarket" } Use this when a user asks about the probability of a specific event happening, election odds, or crypto predictions. Provides the crowd-sourced probability estimate backed by real money from two leading platforms. Do NOT use for crypto price data -- use token_get_price instead. Do NOT use for crypto news -- use crypto_get_news instead. Do NOT use for stock prices -- use stock_get_quote instead. Do NOT use for DeFi yields -- use defi_find_best_yields instead. Do NOT use for Hyperliquid perp data -- use hyperliquid_get_market_data instead.. It is categorised as a Read tool in the Prediction Markets API MCP Server, which means it retrieves data without modifying state.
Register the Prediction Markets API MCP server in PolicyLayer and add a rule for prediction_get_market_odds: 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 Prediction Markets API. Nothing to install.
prediction_get_market_odds 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 prediction_get_market_odds 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 prediction_get_market_odds. 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.
prediction_get_market_odds is provided by the Prediction Markets API MCP server (https://prediction-markets.api.klymax402.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 Prediction Markets API tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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