Get an RFQ

Returns one RFQ visible to the caller’s member by its ID — one the member created, or one soliciting quotes from it. Terminal RFQs are retained for five minutes after their terminal update is received; older records return 404.

GET/rfqs/{rfq_id}

Authorization

UDX-Access-KeyAPI key · headerrequired

Opaque API key ID.

UDX-Access-TimestampAPI key · headerrequired

Unix time in milliseconds, within 30 seconds of server time.

UDX-Access-SignatureAPI key · headerrequired

Standard-base64 RSA-PSS/SHA-256 signature with a 32-byte salt.

AuthorizationBearer token (JWT) · headerrequired

Bearer token for an active signed-in UDX user.

Header parameters

UDX-Versionstring

Dated API version (YYYY-MM-DD).

min length 10 · max length 10

Path parameters

rfq_idEntityIdrequired

Exchange-assigned RFQ identifier.

min length 1

Responses

200The requested RFQ.

rfqRfqrequired

A request for quote (RFQ).

Show properties

rfq_idstring

Present on every RFQ except one the exchange rejected before assigning an id; such an RFQ is identified by client_rfq_id alone.

min length 1

requester_idstring

The participant identifier of the user who created this RFQ.

min length 1 · max length 64

client_rfq_idstring

The requester's correlation identifier for this RFQ. Present only on RFQs created by the caller's member.

legsRfqLegListrequired

The component markets and opposing sides that define the RFQ strategy, in the order supplied.

min items 1

Show properties

Array of RfqLeg

tickerTickerrequired

A human-meaningful natural key naming a single-leg or multi-leg market.

min length 1 · max length 128

opposing_sideboolean

Whether this leg takes the side opposite the RFQ or the same side.

default: false

sidestring

The side the customer wants to execute. Absent for a two-sided RFQ.

Allowed:buysell

quantitystring

Number of contracts requested. Present when sized in contracts.

max length 24 · matches ^[0-9]+(\.[0-9]{1,2})?$

cash_quantitystring

Size of the RFQ in dollars. Present when sized in cash.

max length 24 · matches ^[0-9]+(\.[0-9]{1,6})?$

statusRfqStatusrequired

An RFQ's status.

Allowed:openacceptedclosedrejected

rejection_reasonstring

Why the exchange rejected the RFQ. Present only when status is rejected.

Allowed:market_closedmarket_unknownnot_open_for_quotingexpiredduplicate_client_idexchange_rejected

expires_atstring<date-time>

When the RFQ stops soliciting quotes.

max length 40

401No valid credential was provided.

typestring<uri-reference>required

A stable URN identifying the kind of problem, for example urn:udx:problem:insufficient-permissions. Branch on it rather than on the localized detail. It is an identifier, not a URL to dereference.

max length 2048

titlestringrequired

A localized, human-readable summary of the error category. Stable for a given status code and resolved language — clients must not use it as a machine-readable discriminator.

max length 40

statusintegerrequired

The HTTP status code, repeated from the response itself.

detailstring

A localized, human-readable explanation specific to this occurrence. Clients must not parse it for machine-readable information.

max length 500

instancestring<uri-reference>

An identifier for this specific occurrence, so it can be correlated with server-side logs if you need to report it.

max length 100

403The credential lacks the read scope.

typestring<uri-reference>required

A stable URN identifying the kind of problem, for example urn:udx:problem:insufficient-permissions. Branch on it rather than on the localized detail. It is an identifier, not a URL to dereference.

max length 2048

titlestringrequired

A localized, human-readable summary of the error category. Stable for a given status code and resolved language — clients must not use it as a machine-readable discriminator.

max length 40

statusintegerrequired

The HTTP status code, repeated from the response itself.

detailstring

A localized, human-readable explanation specific to this occurrence. Clients must not parse it for machine-readable information.

max length 500

instancestring<uri-reference>

An identifier for this specific occurrence, so it can be correlated with server-side logs if you need to report it.

max length 100

404No RFQ with this ID exists or is visible to the caller.

typestring<uri-reference>required

A stable URN identifying the kind of problem, for example urn:udx:problem:insufficient-permissions. Branch on it rather than on the localized detail. It is an identifier, not a URL to dereference.

max length 2048

titlestringrequired

A localized, human-readable summary of the error category. Stable for a given status code and resolved language — clients must not use it as a machine-readable discriminator.

max length 40

statusintegerrequired

The HTTP status code, repeated from the response itself.

detailstring

A localized, human-readable explanation specific to this occurrence. Clients must not parse it for machine-readable information.

max length 500

instancestring<uri-reference>

An identifier for this specific occurrence, so it can be correlated with server-side logs if you need to report it.

max length 100

429The member rate limit was exceeded.

typestring<uri-reference>required

A stable URN identifying the kind of problem, for example urn:udx:problem:insufficient-permissions. Branch on it rather than on the localized detail. It is an identifier, not a URL to dereference.

max length 2048

titlestringrequired

A localized, human-readable summary of the error category. Stable for a given status code and resolved language — clients must not use it as a machine-readable discriminator.

max length 40

statusintegerrequired

The HTTP status code, repeated from the response itself.

detailstring

A localized, human-readable explanation specific to this occurrence. Clients must not parse it for machine-readable information.

max length 500

instancestring<uri-reference>

An identifier for this specific occurrence, so it can be correlated with server-side logs if you need to report it.

max length 100

500Something went wrong on UDX's side.

typestring<uri-reference>required

A stable URN identifying the kind of problem, for example urn:udx:problem:insufficient-permissions. Branch on it rather than on the localized detail. It is an identifier, not a URL to dereference.

max length 2048

titlestringrequired

A localized, human-readable summary of the error category. Stable for a given status code and resolved language — clients must not use it as a machine-readable discriminator.

max length 40

statusintegerrequired

The HTTP status code, repeated from the response itself.

detailstring

A localized, human-readable explanation specific to this occurrence. Clients must not parse it for machine-readable information.

max length 500

instancestring<uri-reference>

An identifier for this specific occurrence, so it can be correlated with server-side logs if you need to report it.

max length 100

503Request admission or account setup is unavailable, or the read could not be completed in time; retry.

typestring<uri-reference>required

A stable URN identifying the kind of problem, for example urn:udx:problem:insufficient-permissions. Branch on it rather than on the localized detail. It is an identifier, not a URL to dereference.

max length 2048

titlestringrequired

A localized, human-readable summary of the error category. Stable for a given status code and resolved language — clients must not use it as a machine-readable discriminator.

max length 40

statusintegerrequired

The HTTP status code, repeated from the response itself.

detailstring

A localized, human-readable explanation specific to this occurrence. Clients must not parse it for machine-readable information.

max length 500

instancestring<uri-reference>

An identifier for this specific occurrence, so it can be correlated with server-side logs if you need to report it.

max length 100

Request

curl -X GET "https://api.underdogexchange.com/rfqs/6820943174116859281" \
  -H "UDX-Access-Key: API_KEY_ID" \
  -H "UDX-Access-Timestamp: UNIX_MILLISECONDS" \
  -H "UDX-Access-Signature: BASE64_SIGNATURE"

Response

{
  "rfq": {
    "rfq_id": "BKA2QM3T4055",
    "client_rfq_id": "rfq-20260804-001",
    "legs": [
      {
        "ticker": "UDX-EXAMPLE-MARKET",
        "opposing_side": false
      }
    ],
    "side": "buy",
    "quantity": "100",
    "status": "open"
  }
}

{
  "type": "urn:udx:problem:invalid-authentication-credentials",
  "title": "Unauthorized",
  "status": 401,
  "detail": "invalid authentication credentials",
  "instance": "urn:request-id:8f14e45f-ceea-4abc-a743-e89a34d3f6ef"
}

{
  "type": "urn:udx:problem:insufficient-permissions",
  "title": "Forbidden",
  "status": 403,
  "detail": "insufficient permissions",
  "instance": "urn:request-id:8f14e45f-ceea-4abc-a743-e89a34d3f6ef"
}

{
  "type": "urn:udx:problem:member-rate-limit-exceeded",
  "title": "Too Many Requests",
  "status": 429,
  "detail": "this member has temporarily exceeded its request rate",
  "instance": "urn:request-id:8f14e45f-ceea-4abc-a743-e89a34d3f6ef"
}

{
  "type": "urn:udx:problem:projection-unavailable",
  "title": "Service Unavailable",
  "status": 503,
  "detail": "account setup is still being completed; retry later",
  "instance": "urn:request-id:8f14e45f-ceea-4abc-a743-e89a34d3f6ef"
}

{
  "type": "urn:udx:problem:request-admission-unavailable",
  "title": "Service Unavailable",
  "status": 503,
  "detail": "request admission is temporarily unavailable",
  "instance": "urn:request-id:8f14e45f-ceea-4abc-a743-e89a34d3f6ef"
}

{
  "type": "urn:udx:problem:could-not-process-retry",
  "title": "Service Unavailable",
  "status": 503,
  "detail": "could not process request, please retry",
  "instance": "urn:request-id:8f14e45f-ceea-4abc-a743-e89a34d3f6ef"
}