GET/v1/arbitrage/opportunitiesDEVELOPER+

/v1/arbitrage/opportunities

Ranked cross-market arbitrage opportunities. Each pairs a fresh ask on one market with a fresh bid on another and reports the gross spread (spreadBps/spreadCents), an estimated net before withdrawal/trading fees (estimatedNetCents), the tradable quantity, the estimated notional, and per-leg freshness. All prices are integer USD cents.

Each opportunity pairs a fresh ask on one market (buy, where you'd buy) with a fresh bid on another (sell, where you'd sell), and reports the gross spread (spreadBps / spreadCents) plus an estimatedNetCents before withdrawal and trading fees. Read feeNotes: the net is an estimate, not a guarantee.

maxTradableQuantity is the size you could actually move across both legs; freshness gives each leg's quote age in milliseconds so you can drop stale pairs. Tune the feed with minSpreadBps, minNotionalCents, limit, and sort.

Parameters

limitintegeroptional

Query. Max opportunities to return. Default: 50.

minSpreadBpsintegeroptional

Query. Minimum gross spread in basis points. Default: 200.

minNotionalCentsintegeroptional

Query. Minimum estimated buy-side notional in USD cents. (minNotional is accepted as a deprecated alias.)

sortstringoptional

Query. estimatedNetCents (default) | spreadBps.

marketsstringoptional

Query. CSV of market ids to restrict both legs, e.g. csfloat,buff163.

Response fields

ArbitrageResponseRanked cross-market arbitrage opportunities.

opportunitiesArbitrageOpportunity[]

Ranked by sort (default estimatedNetCents).

totalCandidatesinteger

Crossed-item candidates shortlisted before fresh-quote validation and the query filters (so usually larger than opportunities.length).

calculatedAtstring (date-time)

When the response was calculated.

Nested and shared shapes link to the API Objects reference.

Errors

401Missing Authorization header, unsupported scheme, or a key that is unknown, inactive, expired, or revoked.

403Valid key, but the subscription is inactive/expired or the plan does not include this endpoint.

429Rate limit exceeded; see Retry-After + X-RateLimit-* headers. Pooled per account across all keys.

5xxUpstream snapshot unavailable or a server-side issue. Retry with backoff.

See alsoPer-item NBBO Order-book depth

export SKINPRICER_API_KEY="sp_live_•••"

curl -G "https://pricing.skinpricer.com/v1/arbitrage/opportunities" \
  --data-urlencode "limit=20" \
  --data-urlencode "minSpreadBps=200" \
  -H "Authorization: ApiKey $SKINPRICER_API_KEY"

// npm i @skinpricer/sdk
import { SkinpricerClient } from "@skinpricer/sdk";

const client = new SkinpricerClient({
  apiKey: process.env.SKINPRICER_API_KEY!,
  authScheme: "ApiKey",
});

const { opportunities } = await client.arbitrage.opportunities({ minSpreadBps: 200, limit: 20 });
for (const o of opportunities) console.log(o.marketHashName, o.buy.market, "->", o.sell.market, o.spreadBps, "bps");

import os
import requests

res = requests.get(
    "https://pricing.skinpricer.com/v1/arbitrage/opportunities",
    params={"limit": "20", "minSpreadBps": "200"},
    headers={"Authorization": f"ApiKey {os.environ['SKINPRICER_API_KEY']}"},
    timeout=10,
)
res.raise_for_status()
print(res.json())

Authenticated endpoint: call it with your API key from your own client (see the code sample).

Response 200

{
  "opportunities": [
    {
      "canonicalItemId": "cmlofcnv60ob001vs1ttav3c4",
      "marketHashName": "★ Butterfly Knife | Doppler (Factory New) - Black Pearl",
      "slug": "butterfly-knife-doppler-factory-new-black-pearl",
      "imageUrl": "https://community.akamai.steamstatic.com/economy/image/...",
      "buy": {
        "market": "avanmarket",
        "price": 838504,
        "quoteSize": 2,
        "updatedAt": "2026-06-23T22:02:19.569Z",
        "isStale": false
      },
      "sell": {
        "market": "buff163",
        "price": 1102328,
        "quoteSize": 10,
        "updatedAt": "2026-06-23T21:59:48.717Z",
        "isStale": false
      },
      "spreadBps": 3146,
      "spreadCents": 263824,
      "estimatedNetCents": 263824,
      "maxTradableQuantity": 2,
      "estimatedNotionalCents": 1677008,
      "feeNotes": "Estimated before withdrawal/trading fees; source prices are buyer-visible USD cents.",
      "freshness": {
        "buyAgeMs": 30366,
        "sellAgeMs": 181218
      },
      "calculatedAt": "2026-06-23T22:02:49.935Z"
    }
  ],
  "totalCandidates": 8412,
  "calculatedAt": "2026-06-23T22:02:49.935Z"
}

Response headers

X-RateLimit-Limit: <per-minute, set by your plan>

X-RateLimit-Remaining: <remaining this minute>

X-RateLimit-Reset: <seconds to reset>

X-RateLimit-Remaining-Month: <left this month, capped plans>

X-Request-ID: req_xxxxxxxxxxxxxxxx