API Endpoint

FIRE Number

Calculate financial independence retire early (FIRE) target using 4% withdrawal rule.

Endpoint

POST https://likeoptions.com/api/v1/calculate/fire

Also supports GET with query parameters.

Parameters

Parameter	Type	Default	Description
`annualExpenses`	number	—	Annual expenses ($)
`withdrawalRate`	number	—	Safe withdrawal rate (%)
`currentSavings`	number	—	Current investment portfolio ($)
`annualContribution`	number	—	Annual savings amount ($)

Request Examples

POST (JSON body)

curl -X POST https://likeoptions.com/api/v1/calculate/fire \
  -H "Content-Type: application/json" \
  -d '{"annualExpenses": 100000, "withdrawalRate": 50000, "currentSavings": 6}'

GET (query parameters)

curl "https://likeoptions.com/api/v1/calculate/fire?annualExpenses=100000&withdrawalRate=50000&currentSavings=6"

Response

{
  "kind": "fire",
  "result": {
    "primary": 1234.56,
    "secondary": [
      { "label": "Example metric", "value": 100, "format": "money" },
      { "label": "Example percent", "value": 5.5, "format": "percent" }
    ]
  }
}

When to Use

Calculate FIRE target number
Plan early retirement
Estimate independence timeline

Error Handling

400 Bad Request — Invalid input parameters or missing required fields
404 Not Found — Unknown calculator kind
429 Too Many Requests — Rate limit exceeded (120 req/hour per IP)
413 Payload Too Large — Request body exceeds 16 KB

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