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BlockRun Polymarket Market Open Interest Lookup
x402
BlockRun Polymarket Market Open Interest Lookup is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.0085/call, status unknown (last checked 2026-10-19).
Fetches the open interest for a specific Polymarket prediction market by its contract address
Price / call$0.0085
Success—
StatusUnknown
How this service works
BlockRun lets AI agents use money well: pay for results, not for seats or subscriptions, and put every cent on the model or tool that actually does the job.
Output
Returns open interest data for the specified Polymarket prediction market, indicating the total value of outstanding positions in the market as an on-chain data object.
Example use cases
Prediction market liquidity check
“Can you check the open interest for the Polymarket market at contract 0xabc123...? I want to know how much money is currently locked in that market.”
Monitor high-stakes prediction markets
“Pull up the open interest for the Polymarket contract at 0xdef456... — I'm trying to gauge how liquid this market is before I place a position.”
DeFi research on prediction market activity
“I'm researching prediction market activity — can you get me the open interest figure for the Polymarket market with contract address 0x789fed...?”
Technical details
Endpoint
GEThttps://blockrun.ai/api/v1/pm/polymarket/markets/0x0000000000000000000000000000000000000000000000000000000000000000/open_interest?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need on-chain open interest data for a specific Polymarket prediction market and want the lookup routed through BlockRun's payment layer settled in USDC — ideal for AI agents that need micro-payment-enabled DeFi data access without managing their own RPC infrastructure or API keys.
Side effects
- Invalid or zero-padded contract address returns empty or null data
- Market address not found on Polymarket returns error or empty response
- Network or RPC issues cause timeouts
- Non-existent market addresses may return zero values without explicit errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Tags
x402
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