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Romny Cross-Venue Odds – Robinhood↔Polymarket Matched Contract Pairs
x402
Romny Cross-Venue Odds – Robinhood↔Polymarket Matched Contract Pairs is a paid API for AI agents from api.romny.dpdns.org, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-23).
Returns matched contract pairs between Robinhood and Polymarket prediction markets with a confidence score for each match
Price / call$0.1
Success—
StatusUnknown
How this service works
Robinhood↔Polymarket matched contract pairs with confidence
Output
A list of matched contract pairs, each containing the Robinhood contract details, the corresponding Polymarket contract details, and a floating-point confidence score indicating how strongly the two contracts are believed to represent the same underlying event. Results are capped by the requested limit and filtered by the minimum confidence threshold.
Example use cases
Arbitrage opportunity scanning
“Find me all Robinhood and Polymarket contracts that are matched with at least 0.85 confidence — I want to compare odds across venues for potential arbitrage.”
Curated high-confidence pair list
“Give me up to 100 cross-venue prediction market pairs between Robinhood and Polymarket, only showing the ones with a match confidence above 0.9.”
Broad cross-venue market survey
“Pull the full list of matched Robinhood–Polymarket contracts with default confidence filtering so I can see which events are tradeable on both platforms.”
Technical details
Endpoint
GEThttps://api.romny.dpdns.org/v1/rh/pm-matches?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to identify which prediction market contracts on Robinhood have a corresponding match on Polymarket, especially for cross-venue odds comparison or arbitrage analysis. Prefer this over the probability-spread endpoint when you want to discover the matched pairs themselves rather than analyze the spread between already-known pairs.
Side effects
- Invalid limit value outside 1-200 range may return a validation error
- min_confidence outside 0-1 range may return a validation error
- No matches found above the specified confidence threshold returns an empty list
- Payment not included or insufficient USDC causes a 402 payment required error
- Service unavailability from upstream data sources may cause 503 errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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