Coast FIRE calculator
Coast FIRE calculator. Computes the lump sum needed today, invested with zero further contributions, to grow into your full retirement number by your target retirement age, plus (given an ongoing monthly contribution) a year-by-year projection of when your actual trajectory crosses that lump sum.
10000 (raw units)
price
3
calls / 30d
1
unique payers
2026-08-30
updated
Provider
x402.outpimp.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x548eFd4f4d4A5C3669dbb4CBB2B1A637FeeEc5F6",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "APer2AbhckyMWyJanW2MZ2eRLcpL9Lmhks8rkmXfqjRG",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "10000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"currentAge": 30,
"currentNetWorth": 100000,
"retirementAge": 65,
"retirementAnnualSpending": 40000
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"data": {
"coastFireMessage": "You need to increase your monthly contribution to reach Coast FIRE before age 65",
"coastFireNumberToday": 253415.47072729058,
"fireNumberAtRetirement": 1000000,
"hasCoastFired": false,
"params": {
"currentAge": 30,
"currentNetWorth": 100000,
"inflationRate": 0.03,
"investmentReturnRate": 0.07,
"monthlyContribution": 0,
"retirementAge": 65,
"retirementAnnualSpending": 40000,
"swr": 0.04
},
"surplusOrDeficit": -153415.47072729058,
"yearsToCoastFire": null
},
"ok": true
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"currentAge": {
"description": "Your current age in years.",
"type": "number"
},
"currentNetWorth": {
"description": "Current invested net worth.",
"type": "number"
},
"inflationRate": {
"default": 0.03,
"description": "Expected annual inflation rate, as a fraction. Default 0.03.",
"type": "number"
},
"investmentReturnRate": {
"default": 0.07,
"description": "Expected annual investment return, as a fraction. Default 0.07.",
"type": "number"
},
"monthlyContribution": {
"default": 0,
"description": "Ongoing monthly contribution toward currentNetWorth. Default 0.",
"type": "number"
},
"retirementAge": {
"default": 67,
"description": "Target traditional retirement age. Default 67.",
"type": "number"
},
"retirementAnnualSpending": {
"description": "Expected annual spending in retirement.",
"type": "number"
},
"swr": {
"default": 0.04,
"description": "Safe withdrawal rate, as a fraction. Default 0.04.",
"type": "number"
}
},
"required": [
"currentAge",
"currentNetWorth",
"retirementAnnualSpending"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"a": "x402_api_vendor",
"s": [
"cdp_sdk_server"
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"maxItems": 11,
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
},
"eip2612GasSponsoring": {},
"erc20ApprovalGasSponsoring": {}
}Use it
curl
curl "https://x402.outpimp.com/coastFireCalculator" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://x402.outpimp.com/coastFireCalculator");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://x402.outpimp.com/coastFireCalculator")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/8410.json, and this resource appears in /discovery/resources and /discovery/search.