Describes the change feed -- an append-only log of every detected fee/KYC/withdrawal/API change across venues since a given timestamp. This is the paid, time-sensitive product; it is gated by the x402 protocol (HTTP 402) rather than exposed here, so it stays accurate to call directly for real-time data.

Get one venue's current fee/KYC/withdrawal/API-access data by slug (e.g. 'kalshi', 'polymarket'). Free. Call list_venues first if the slug isn't already known.

List all tracked prediction market venues with their current fee/KYC/withdrawal snapshot. Free. Args: confidence: optional filter -- 'verified', 'stale', or 'unconfirmed'. Use 'unconfirmed' to find venues whose data needs a human check.

Recommend which tracked prediction-market venue best fits a natural-language need, by weighing fee/KYC/withdrawal/API-access/jurisdiction data against what the query asks for. Free. Use this for comparative "which venue is best for X" questions -- e.g. "lowest fees for high-frequency trading", "I don't want to do KYC", "programmatic API access without a wallet", "fastest withdrawals". For a single already-known venue use get_venue instead; to browse/filter by confidence use list_venues. Based only on the structured fields this tracker collects (fees, KYC, geo restrictions, withdrawal methods/limits, API access, jurisdiction, custody model). It does NOT have liquidity, trading volume, spread, or uptime data -- if the query depends on those, the response says so rather than guessing. Args: query: free-text description of what matters (cost, KYC/privacy, withdrawal speed, API access, jurisdiction, custody, etc). Can combine multiple criteria in one query.