Cash runway calculator API

Compute cash runway months = cashOnHand / monthlyNetBurn (or derive burn from monthlyExpenses - monthlyRevenue) with a rating (<6 critical, 6-12 raise-soon, 12-18 healthy, >18 strong) and cash-flow-positive detection. Answers 'how much runway do I have','how many months until I run out of cash','when should I raise'.

Price$0.01per request

MethodPOST

Route/v1/calc/saas-runway

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

saasrunwayburncashstartupmetricsfundraisingcalc

API URLhttps://x402.hexl.dev/v1/calc/saas-runway

Integration docs

Example request

{
  "cashOnHand": 2000000,
  "monthlyNetBurn": 125000
}

Example response

{
  "runwayMonths": 16,
  "cashFlowPositive": false,
  "rating": "healthy",
  "formula": "runwayMonths = cashOnHand / monthlyNetBurn",
  "breakdown": {
    "cashOnHand": 2000000,
    "monthlyNetBurn": 125000
  }
}

Input schema

{
  "type": "object",
  "required": [
    "cashOnHand"
  ],
  "properties": {
    "cashOnHand": {
      "type": "number",
      "description": "cash in the bank (currency, > 0)",
      "examples": [
        2000000
      ]
    },
    "monthlyNetBurn": {
      "type": "number",
      "description": "monthly net cash burn (currency)",
      "examples": [
        125000
      ]
    },
    "monthlyExpenses": {
      "type": "number",
      "description": "monthly expenses, used if netBurn omitted (currency)"
    },
    "monthlyRevenue": {
      "type": "number",
      "description": "monthly revenue, subtracted from expenses (currency)"
    }
  }
}

Output schema

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