# 24K Labs Retirement & FIRE Calculator

> 24K Labs Retirement & FIRE Calculator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Calculates retirement corpus, years-to-financial-independence, and safe withdrawal amounts based on savings, contributions, return rate, inflation, and target spend.

## Facts

- Endpoint: POST https://api.24klabs.ai/api/retirement-fire-calculator
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/24k-labs-retirement-fire-calculator-d5591760
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lYawidevXZd5l3K5KmO5J

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability 24k-labs-retirement-fire-calculator-d5591760 -d '<json body>'
```

Example prompt: I have $250,000 saved, contribute $24,000 per year, expect a 7% annual return, 3% inflation, and want to spend $60,000 per year in retirement — how many years until I hit my FIRE number and what will my retirement corpus be?

## When to prefer this

Choose this endpoint when you need a fast, structured FIRE/retirement calculation that combines corpus projection, years-to-FI, and safe withdrawal in a single call. It is purpose-built for the FIRE movement's standard assumptions (configurable withdrawal rate defaulting to 4%) and accounts for inflation, making it superior to generic financial formula endpoints. Ideal for personal finance agents, retirement planning tools, or any workflow that needs parameterized retirement projections without building the math from scratch.

## Known failure modes

- Missing required fields (e.g. no current savings or target spend) returning a 400 error
- Implausible inputs such as negative return rates or zero contributions causing computation errors
- Withdrawal rate set so low or high that results are nonsensical
- Inflation rate exceeding return rate producing undefined or infinite years-to-FI
- Payment failure or insufficient USDC balance causing 402 rejection

## How this service works

Retirement corpus, years-to-FI and safe withdrawal draw from current savings, contribution, expected return, inflation and target annual spend (withdrawal rate configurable, default 4%).

## Output

Returns the projected retirement corpus at the point of financial independence, the number of years required to reach FI, the safe annual withdrawal amount based on the configured withdrawal rate (default 4%), and related projections factoring in contributions, expected investment return, and inflation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "inflation": {
   "type": "number"
  },
  "annual_spend": {
   "type": "number"
  },
  "current_savings": {
   "type": "number"
  },
  "expected_return": {
   "type": "number"
  },
  "withdrawal_rate": {
   "type": "number"
  },
  "annual_contribution": {
   "type": "number"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "fire_number": 1250000,
  "years_to_fi": 18,
  "safe_annual_withdrawal": 50000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/24k-labs-retirement-fire-calculator-d5591760/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.24klabs.ai](https://www.zero.xyz/host/api.24klabs.ai/llms.txt)