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Combo RFQ

WebSocket Streams

Combo RFQ uses three streams:

Stream	Auth	Use for
requestForQuote	Public	Discovering RFQ auctions (anonymous broadcast).
requestForQuote@account	Authenticated (view_orders)	Your private deliveries: the selected quote after your RFQ closes, acceptances of your quotes, and confirm/decline outcomes. Each delivery has a durable event ID for deduplication.
requestForQuote@session	Authenticated (view_orders)	Same account-scoped deliveries as @account; an alternate subscription form. Mutually exclusive with @account.

requestForQuote

Anonymous, real-time feed of combo request-for-quote auctions. When a taker opens an RFQ, this feed broadcasts the auction so makers can choose to quote it. Only the auction's existence and parameters are broadcast: the requester's identity, the maker accounts, and the individual quotes are never included. After close, only the selected quote is delivered privately to the requester over an authenticated stream.

Auth: public. Anyone can subscribe.

Message shape

Code
{
  "e": "requestForQuote",
  "E": 1780000000000,
  "r": "01J9Z3K7Q2N8M4P6R8T0V2W4X6",
  "s": "GEMI-CMB-260306-A1B2C3D4E5F6G7H8-CMB",
  "l": [
    { "c": "123456", "o": "YES", "s": "GEMI-XRPUSD-260828" },
    { "c": "123789", "o": "NO" }
  ],
  "n": "50000.00",
  "S": "OPEN",
  "w": 1780000001000,
  "x": 1780000120000,
  "c": 1780000000000
}

Field	Type	Description
e	string	Event type — always requestForQuote.
E	number	Event timestamp (milliseconds).
r	string	rfqId — unique ULID for this request-for-quote. Pass it to rfq.submit_quote.
s	string	The combo's deterministic instrument symbol, when available. Use it to place a CLOB order on the combo; this activates its book on demand.
l	array	The contracts that make up the combo, in a fixed order. Each: c = CMS contract id, o = the outcome the combo takes on that contract (YES / NO), s = the leg's own instrument symbol, when available.
n	string	Requested size as a USD notional, if sized that way. Omitted otherwise; mutually exclusive with q.
q	string	Requested size in contracts, if sized that way. Omitted otherwise; mutually exclusive with n. The RFQ quantity grid can be whole contracts or 0.01 fractional contracts.
f	string	Execution quantity calculated when the requester accepts. It is present on later lifecycle events and can appear on FAILED; only S: "FINALIZED" confirms successful execution.
S	string	Lifecycle state (OPEN / PENDING_ACCEPTANCE / CONFIRMING / FINALIZING / FINALIZED / CANCELLED / EXPIRED / FAILED). OPEN is live and quotable.
w	number	When the 1-second quoting window closes (milliseconds), 1 second after RFQ creation. Omitted when unset.
x	number	Hard expiry by which the auction must finalize (milliseconds). Omitted when unset.
c	number	When the request-for-quote was created (milliseconds). Omitted when unset.

The public stream emits RFQ-existence transitions: creation, cancellation, close, expiry, finalization, and failure. It does not emit the requester acceptance or maker confirmation transitions, and it never carries quote contents.

Replay on reconnect

requestForQuote is an event stream, not a state snapshot. Auctions broadcast while you were disconnected are not replayed. Auctions are short-lived (the quoting window is carried in w), so treat a reconnect as starting fresh.

requestForQuote@account

Private combo-RFQ deliveries for the authenticated account.

• As a requester: receive only the selected quote after your RFQ closes, followed by the winning maker's confirm/decline and the terminal outcome.
• As a maker: receive the requester's acceptance of your quote and the terminal outcome. Respond to ACCEPTED with rfq.confirm_quote immediately; the 1-second deadline starts with the CONFIRMING transition, not delivery processing.

The quoting window is sealed: quote submissions and withdrawals produce no customer delivery while the RFQ is OPEN. At close, the requester receives one CLOSED delivery containing only the selected quote. Losing quotes remain undisclosed, and the requester is not told which maker submitted the selected quote (it is keyed by quoteId only).

The service does not assign session-level or RFQ-level participant pseudonyms. r identifies the RFQ and q identifies either the requested quantity or a quote, depending on the stream; neither identifies a participant. Counterparty account identities are not disclosed through these streams, including after execution.

Auth: required, with the view_orders capability. See Authentication. Mutually exclusive with requestForQuote@session.

Message shape

Code
{
  "e": "requestForQuote",
  "i": "b16097e9-3d7f-5910-9820-eeedf51a8be3",
  "E": 1780000001000,
  "r": "01J9Z3K7Q2N8M4P6R8T0V2W4X6",
  "x": "CLOSED",
  "S": "PENDING_ACCEPTANCE",
  "q": "01J9Z2K7Q2N8M4P6R8T0V2W4X6",
  "p": "0.55",
  "sz": "100",
  "qs": "ACTIVE",
  "vu": 1780000060000
}

Field	Type	Description
e	string	Event type — always requestForQuote.
i	string	Durable lifecycle-event UUID. Use it as an idempotency key when a transition is redelivered.
E	number	Event timestamp (milliseconds).
r	string	rfqId this delivery concerns.
x	string	Which customer-visible lifecycle transition this delivery reports (CLOSED / ACCEPTED / CONFIRMED / DECLINED / FINALIZED / FAILED). CLOSED privately discloses the selected quote to the requester.
S	string	Lifecycle state of the RFQ after this transition (same vocabulary as the public feed).
q	string	quoteId this delivery concerns; the requester accepts by this id. Absent on RFQ-level deliveries.
p	string	The quote's single-sided bid per contract. Absent on RFQ-level deliveries.
sz	string	Quote quantity in contracts. Absent on RFQ-level deliveries.
qs	string	Quote status (ACTIVE / WITHDRAWN / EXPIRED / WON / LOST). Absent on RFQ-level deliveries.
vu	number	Quote close-time eligibility deadline (milliseconds). A selected quote had vu >= w; when the maker omitted validUntil, vu equals w. It is not checked again after selection. Absent on RFQ-level deliveries.

:::note Field keys x and q differ between the two streams On the public requestForQuote feed, x is the numeric hard-expiry timestamp and q is the requested contract quantity. On the authenticated deliveries, x is the string transition name and q is the quoteId. Parse per stream. :::

Redelivery and deduplication

Authenticated lifecycle delivery is at least once. A transition can therefore arrive more than once, with the same i. Persist or otherwise deduplicate on i; do not use E, r, or x alone as the idempotency key.

requestForQuote@session

Identical account-scoped deliveries to requestForQuote@account, provided for subscription symmetry with the order streams. It does not filter RFQ events to the session that opened or quoted the RFQ. Subscribe to one or the other, not both — they are mutually exclusive on a connection.

Connection notes

• Same endpoint as all other Predictions streams: wss://ws.gemini.com.
• Same subscribe message shape and connection parameters as the Introduction.
• The maker quote actions ride the same connection as request/response methods — see Quote Methods and the general Message Format.

See also

• Quote Methods — submit, withdraw, confirm.
• Maker Integration — the full workflow tying streams and methods together.
• Standard Stream Reference — order, position, and balance streams for the resulting trades.