SaaS magic number calculator API

Compute the SaaS magic number = net-new ARR / prior-period sales & marketing spend with a rating (>1 efficient scale-up, 0.75-1 acceptable, <0.75 inefficient) and breakdown. Deterministic GTM-efficiency math. Answers 'what is my magic number','is my sales spend efficient','should I scale up sales'.

Price$0.01per request

MethodPOST

Route/v1/calc/saas-magic-number

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

saasmagic-numbersales-efficiencygtmstartupmetricsarrcalc

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

Integration docs

Example request

{
  "newArr": 200000,
  "priorSalesMarketing": 150000
}

Example response

{
  "magicNumber": 1.333,
  "rating": "efficient-scale-up",
  "formula": "magicNumber = net-new ARR / prior-period sales & marketing spend",
  "breakdown": {
    "newArr": 200000,
    "priorSalesMarketing": 150000
  }
}

Input schema

{
  "type": "object",
  "required": [
    "newArr",
    "priorSalesMarketing"
  ],
  "properties": {
    "newArr": {
      "type": "number",
      "description": "net-new ARR added in the period (currency)",
      "examples": [
        200000
      ]
    },
    "priorSalesMarketing": {
      "type": "number",
      "description": "prior-period fully-loaded S&M spend (currency)",
      "examples": [
        150000
      ]
    }
  }
}

Output schema

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