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BlockRun Polymarket Open Interest Lookup
x402
BlockRun Polymarket 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 2026-09-15).
Fetches open interest data for a specific Polymarket prediction market condition via the BlockRun routing and payment layer.
Price / call$0.0085
Success—
StatusUnknown
How this service works
Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 103 models and 100 data and tool APIs.
Output
Returns open interest data for the specified Polymarket condition, including the total value of open positions and related market metrics, allowing agents to assess liquidity and market depth for a given prediction market event.
Example use cases
Pre-trade liquidity check
“Before I take a position, can you pull the open interest for Polymarket condition 0x3a2f1b9c4e7d8a6b to see how liquid that market is?”
Monitoring a political market
“Check the open interest on Polymarket condition 0x9f4e2c7a1b3d8e5f — I want to track how much capital is riding on that election outcome.”
Comparing market depth across events
“Get me the open interest for Polymarket condition 0x1c8d4f2e9b7a3c6d so I can compare it with another market I'm watching.”
Technical details
Endpoint
GEThttps://blockrun.ai/api/v1/surf/prediction-market/polymarket/open-interestWhen to prefer
Use this endpoint when you need on-chain open interest data specifically from Polymarket and are operating within a BlockRun-enabled agent stack that handles x402 micropayments in USDC. Prefer this over scraping Polymarket directly or using other prediction market APIs when you need programmatic, agent-friendly access with built-in payment settlement.
Side effects
- Missing or invalid condition_id returns an error or empty result
- Condition ID references a closed or non-existent market
- Payment failure via x402 protocol prevents the call from completing
- Rate limiting or upstream Polymarket API unavailability
- Malformed condition_id string format rejected by the API
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| condition_id | string | Required query param |
Tags
x402
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