Single-option breakeven API

Compute the expiration breakeven of a single option leg (call = strike + premium, put = strike - premium) plus max profit/loss and cost basis or credit. Deterministic options algebra LLMs flip the sign on. Answers 'what's the breakeven on this call','where do I break even on a long put','what's my max loss on a short option'.

Price$0.03per request

MethodPOST

Route/v1/calc/opt-option-breakeven

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

optionsbreakevencalcderivativespayoffcallputtrading

API URLhttps://x402.hexl.dev/v1/calc/opt-option-breakeven

Integration docs

Example request

{
  "type": "call",
  "strike": 100,
  "premium": 3.5,
  "side": "long"
}

Example response

{
  "type": "call",
  "side": "long",
  "strike": 100,
  "premium": 3.5,
  "multiplier": 100,
  "breakeven": 103.5,
  "formula": "breakeven = strike + premium",
  "maxProfit": "unlimited",
  "maxLoss": 350,
  "costBasisOrCredit": 350
}

Input schema

{
  "type": "object",
  "required": [
    "type",
    "strike",
    "premium"
  ],
  "properties": {
    "type": {
      "type": "string",
      "enum": [
        "call",
        "put"
      ],
      "examples": [
        "call"
      ]
    },
    "strike": {
      "type": "number",
      "description": "strike price",
      "examples": [
        100
      ]
    },
    "premium": {
      "type": "number",
      "description": "option premium per share",
      "examples": [
        3.5
      ]
    },
    "side": {
      "type": "string",
      "enum": [
        "long",
        "short"
      ],
      "default": "long"
    },
    "multiplier": {
      "type": "number",
      "default": 100
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}