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AlphaPipeline Neg-Risk Arbitrage
x402
AlphaPipeline Neg-Risk Arbitrage is a paid API for AI agents from alphapipeline-eu.onrender.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12).
Detects basket arbitrage opportunities in Polymarket neg-risk (mutually-exclusive, multi-outcome) events by checking whether the sum of all outcome prices deviates from $1, and computes executable liquidity capacity for each direction.
Price / call$0.03
Success—
StatusUnknown
How this service works
Detect basket arbitrage in a Polymarket neg-risk (mutually-exclusive, multi-outcome) event - since a full YES basket across all outcomes always settles to exactly $1, a basket price away from $1 is a near risk-free edge. Also computes buy/sell_basket_capacity_shares, the actual liquidity-bottleneck size executable right now, so this is not just a top-of-book mirage. Polymarket only (Kalshi's Data ToS forbids this use of their data). Paid in USDC on Base.
Output
Returns a structured response including the basket ask sum and bid sum (summed across all outcomes), an opportunity description string characterizing the arbitrage direction and magnitude, an arbitrage_viable boolean flag, buy and sell basket capacity in shares (the actual liquidity-bottleneck size executable right now given slippage), number of outcomes, assumed round-trip cost, and a timestamp pair in UTC and KST. An optional notice field may include warnings or caveats.
Example use cases
Pre-trade arbitrage viability check
“Before I put on a neg-risk trade on Polymarket's 'who-wins-the-2024-senate' event, check if there's a genuine basket arbitrage opportunity right now — use 1% max slippage and flag only if the net edge is above 1.5%.”
Real-time liquidity bottleneck sizing
“For the Polymarket event 'nba-champion-2025', tell me how many shares I can actually execute on the buy-basket side right now with 2% max slippage, and whether the arbitrage is viable after a 1.5% round-trip cost assumption.”
Automated arbitrage scanner for a known event
“Scan the Polymarket neg-risk event 'super-bowl-lvix-winner' for any basket price deviation from $1 — I want to know the exact opportunity description, basket ask and bid sums, and the executable capacity on both sides.”
Technical details
Endpoint
GEThttps://alphapipeline-eu.onrender.com/v1/prediction/neg-risk-arbitrage?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to detect and size neg-risk basket arbitrage specifically on Polymarket multi-outcome mutually-exclusive events. It is the right choice when you need not just a theoretical price signal but actual executable capacity accounting for order book depth and slippage. Prefer this over generic order book tools because it understands the neg-risk constraint that a full YES basket always settles to exactly $1. Do not use for Kalshi (ToS prohibits this data use) or for binary (two-outcome) markets where neg-risk mechanics do not apply.
Side effects
- Invalid or non-existent event_slug returns an error or empty result
- Event is not a neg-risk (mutually exclusive) market — endpoint is only valid for Polymarket neg-risk events
- Polymarket API unavailable or rate-limited — data may be stale or unavailable
- No arbitrage opportunity found — arbitrage_viable returns false with near-zero edge
- Liquidity too thin — buy/sell basket capacity returns zero or near-zero shares
- Payment failure in USDC on Base — request not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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