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POST
/
quote
/
indicative
curl -X POST https://api.convallax.com/quote/indicative \
  -H "Content-Type: application/json" \
  -d '{
    "option": {
      "currentYesPrice": 0.62,
      "strikeBps": 50,
      "optionType": "call",
      "tauDays": 7,
      "sigmaL": 2.0
    },
    "trade": {
      "side": "buy",
      "size": 10
    }
  }'

{
  "success": true,
  "bid": 0.10,
  "ask": 0.14,
  "fairValue": 0.12,
  "spread_bps": 200,
  "price": 0.14,
  "side": "buy"
}
Get a model-based indicative bid and ask price for an option before committing to a trade. This is used by the frontend to display live pricing. No wallet signature or authentication is required. The indicative quote is computed by the internal pricing engine using a logit-normal model with Avellaneda-Stoikov spread dynamics. It reflects the current fair value but is not a firm quote — actual execution prices come from the RFQ flow.

​
Request Body

The request body uses nested option and trade objects:
​
option
object
required
Option parameters for the quote.
​
trade
object
required
Trade parameters.

​
Response

​
success
boolean
Whether the request was successful.
​
bid
number
Best bid price per option.
​
ask
number
Best ask price per option.
​
fairValue
number
Model-computed fair value.
​
spread_bps
number
Bid-ask spread in basis points.
​
price
number
The relevant price for the requested side — ask if buying, bid if selling.
​
side
string
"buy" or "sell" — echoes the requested side.
curl -X POST https://api.convallax.com/quote/indicative \
  -H "Content-Type: application/json" \
  -d '{
    "option": {
      "currentYesPrice": 0.62,
      "strikeBps": 50,
      "optionType": "call",
      "tauDays": 7,
      "sigmaL": 2.0
    },
    "trade": {
      "side": "buy",
      "size": 10
    }
  }'

{
  "success": true,
  "bid": 0.10,
  "ask": 0.14,
  "fairValue": 0.12,
  "spread_bps": 200,
  "price": 0.14,
  "side": "buy"
}