Parlays (2–12 leg trades)

A parlay combines 2–12 individual selections into one order: every leg must settle as profit for the parlay to settle as profit. The workflow is quote → confirm → poll, not a single-shot submit, because the price is stitched together from the constituent legs and can move while your user is deciding.

Auth: user-scoped on all three endpoints (sub == acting user's UUID + subsig). See Authentication.

Required permission: parlay. All three of POST /private/v1/parlays, GET /private/v1/parlays/{parlayId}, and POST /private/v1/parlays/{parlayId}/confirm are gated server-side on the parlay user permission (via the x-required-permission annotation on the spec). A user without it gets 403 permission_denied. Call GET /private/v1/users/USERID/permissions first to see whether they're cleared — see User Onboarding.

For single-contract orders, see Market Orders (single-contract trades).

1. The flow

GET  /private/v1/parlays/supported-contracts   ─►  pre-filter a bet slip to
                                                   parlay-eligible contracts
POST /private/v1/parlays                       ─►  201 with parlayId + offer
POST /private/v1/parlays/{parlayId}/confirm    ─►  commit at the quoted price
GET  /private/v1/parlays/{parlayId}            ─►  poll fillStatus + settlementStatus
GET  /private/v1/parlays                       ─►  user's parlay history (token-paginated)

Polling is the simplest option. If you'd rather not poll, subscribe to ParlayEvent webhooks — see Webhooks (push events).

2. The state model

The most common failure path is: you got a quote, the user took a moment, the SP price moved, and confirm now fails. The recovery is to re-quote with the same legs and try again.

3. GET /private/v1/parlays/supported-contracts — pre-filter a bet slip (optional)

Not every contract can be priced as a parlay leg. Sports pricing engines (SPs) selectively opt contracts in and out, so if you send POST /parlays with a leg that's currently unsupported, the request will validate but fail to quote (400 no_offers_available) once no SP can price the combo. This endpoint gives you the eligibility list up front so you can grey out unsupportable legs before the user builds a slip that can't be priced.

Auth: user-scoped (sub + subsig). Requires the parlay permission — same gate as the other parlay endpoints.

Query:

Response (ParlaySupportedContractsResponse):

{
  "supportedContracts": [
    {
      "eventId": 20023797,
      "contractIds": [
        "8315d4bc44d06eef736959e0b214c170",
        "2d179d1578e669e97a2e57735f0cbef8"
      ]
    }
  ]
}

Notes:

• Events with zero supported contracts are omitted from the response entirely — don't rely on every event you asked about appearing in supportedContracts. If an event isn't in the array, none of its contracts are parlay-eligible right now.
• Support can change over time — treat this as a live snapshot, not a static configuration. Re-check before quoting when a lot of time has passed between slip build and confirm.
• This is advisory only: the actual parlay quote via POST /parlays is the source of truth. Use supported-contracts to keep the UX clean, but expect POST /parlays to sometimes come back with 400 no_offers_available even for a contract you last saw as supported.

4. POST /private/v1/parlays — create a quote

Body (CreateParlayRequest):

{
  "quantity": 10.00,
  "legs": [
    { "eventId": 1, "marketId": 7, "outcomeId": 2, "contractId": "abc..." },
    { "eventId": 2, "marketId": 9, "outcomeId": 1, "contractId": "def...", "strike": 220.5 }
  ]
}

Rules:

• legs.length between 2 and 12 inclusive.
• Each leg requires eventId, marketId, outcomeId, and contractId. strike is only needed for markets that have one (spreads, totals, etc.).
• quantity > 0 in USD.

Response (201, CreateParlayResponse):

{
  "parlayId": "00000000-0000-0000-0000-000000000000",
  "offer": {
    "price": 615,
    "adjustedPrice": 590,
    "maxQuantity": 50.00,
    "legs": [
      { "contractId": "abc...", "price": -120 },
      { "contractId": "def...", "price": +150 }
    ]
  }
}

• price is the combined American price; adjustedPrice is after the ISV fee. Show the adjusted one to your user.
• maxQuantity caps how much you can confirm at this price.

Failure modes:

• 422 — out-of-range leg count, malformed body, or leg validation (bad contractId, missing required field, etc.).
• 400 no_offers_available — no SP could price the combo. There's no partial/absent-offer success response for this case — the request fails outright. Your options are to retry, drop legs, or reduce quantity.

5. POST /private/v1/parlays/{parlayId}/confirm — commit

Body (ConfirmParlayRequest):

{ "quantity": 10.00 }

quantity > 0, and must be ≤ the offer.maxQuantity returned by the quote.

Response (200, ConfirmParlayResponse):

{
  "parlayId": "...",
  "confirmedAt": "...",
  "requestedQuantity": 10.00,
  "fee": 0.50,
  "quantity": 9.50
}

Failure modes:

• 402 — insufficient balance.
• 422 — malformed body.
• 400 quantity_exceeds_offer — requested quantity is above the offer's maxQuantity.
• 400 parlay_not_valid — the parlay wasn't found or has expired.

After confirm, the parlay is submitted to SPs for filling. Move on to polling — or subscribe to the parlay webhook and let updates push to you.

6. GET /private/v1/parlays/{parlayId} — the full state

Response (Parlay):

{
  "parlayId": "...",
  "fillStatus": "filled",
  "failReason": null,
  "settlementStatus": "tbd",
  "quotedPrice": -115.0,
  "adjustedPrice": -120.0,
  "requestedQuantity": 50.00,
  "fee": 2.00,
  "quantity": 48.00,
  "filledQuantity": 48.00,
  "unfilledQuantity": 0.00,
  "payout": null,
  "confirmedAt": "...",
  "legs": [
    {
      "contractId": "abc...",
      "event": { "...": "..." },
      "market": { "...": "..." },
      "selection": { "...": "..." },
      "score": { "...": "..." },
      "settlementStatus": "tbd"
    }
  ]
}

payout is populated only when settlementStatus = profit.

7. GET /private/v1/parlays — list a user's parlay history

Returns the requesting user's parlays, most-recent first, token-paginated. The response shape is different from the GET-by-ID above — this endpoint returns ParlayHistoryItem (a lighter-weight history record), not the full Parlay.

Query parameters

Response (ListParlaysResponse)

{
  "parlays": [
    {
      "parlayId": "00000000-0000-0000-0000-000000000000",
      "status": "filled",
      "settlementStatus": "tbd",
      "requestedPrice": -115.0,
      "requestedQuantity": 50.00,
      "confirmedPrice": -118.0,
      "quantity": 48.00,
      "settledPrice": null,
      "maxProfit": 41.60,
      "payout": null,
      "createdAt": "...",
      "updatedAt": "...",
      "legs": [
        { "contractId": "abc...", "eventId": 1, "marketId": 7, "outcomeId": 2 }
      ]
    }
  ],
  "paging": { "limit": 25, "token": "eyJpZCI6MTAwfQ==" }
}

paging.token is absent when there are no more pages — that's how you know to stop.

Field meanings

• status — lifecycle status as a free-form string for forward compatibility. Known values: open, filled, finalized, pending_payout, payout_submitted, settled, rejected, void, failed. Don't switch exhaustively on this; treat unknowns as "no further state changes expected on our side".
• settlementStatus — same enum as the GET-by-ID: profit | loss | tbd | push | void.
• requestedPrice / requestedQuantity — the quote you confirmed against.
• confirmedPrice / quantity — the price actually filled and the quantity after fee, populated once filled (absent before).
• settledPrice / payout — populated once settled. payout is realized profit.
• maxProfit — projected profit if the parlay wins fully.

The list endpoint is a thin summary view — there's intentionally less information here than in GET /parlays/{parlayId}. Use the list to populate a history UI, and the GET-by-ID when the user clicks into one row.

8. Money movement is automatic

Just like single-contract orders, you don't move money for parlay flow. ProphetX handles it on its side:

• Quantity debit at confirm — requestedQuantity is deducted, fee is taken (fee on the response, ORDER_FEE transaction), and the remaining quantity is what actually goes on the parlay.
• Settlement — when every leg has resolved, ProphetX credits the payout on a win (PAY transaction, payout set, settlementStatus = profit) or settles to loss / push / void with the corresponding ledger entry. The ParlayEvent webhook fires on every state change.

No manual posting from your side. See Wallets for the resulting TransactionType rows.

9. Handling failed fills

If fillStatus = failed after confirm, failReason will usually read "price moved" — meaning the SP pulled or revised their price between your quote and your confirm. Standard handling:

1. Pop the user back to the quote screen.
2. Call POST /parlays again with the same legs (or let the user edit them).
3. Show the new offer.adjustedPrice and offer.maxQuantity.
4. Confirm again if the user accepts.

Don't try to retry-confirm the same parlayId — it's a terminal state.

10. Curl

BASE="https://isv-api.sandbox.prophetx.dev/private/v1"

# 0. (Optional) Pre-filter: which contracts on these events can be parlayed?
curl "$BASE/parlays/supported-contracts?eventIds=1,2" \
  -H "Authorization: Bearer $JWT_USER"

# 1. Quote
curl -X POST "$BASE/parlays" \
  -H "Authorization: Bearer $JWT_USER" \
  -H "Content-Type: application/json" \
  -d '{
    "quantity": 10.00,
    "legs": [
      { "eventId":1, "marketId":7, "outcomeId":2, "contractId":"abc..." },
      { "eventId":2, "marketId":9, "outcomeId":1, "contractId":"def...", "strike":220.5 }
    ]
  }'
# → 201 { "parlayId":"<id>", "offer": { ... } }

# 2. Confirm
curl -X POST "$BASE/parlays/<id>/confirm" \
  -H "Authorization: Bearer $JWT_USER" \
  -H "Content-Type: application/json" \
  -d '{ "quantity": 10.00 }'

# 3. Poll
curl "$BASE/parlays/<id>" -H "Authorization: Bearer $JWT_USER"

# 4. History (most recent first; paginate via `paging.token`)
curl "$BASE/parlays?limit=25&type=confirmed&dateRangeFilter=this_week" \
  -H "Authorization: Bearer $JWT_USER"