# agent402.tools Savings Goal Monthly Contribution Calculator

> agent402.tools Savings Goal Monthly Contribution Calculator is a paid API for AI agents from agent402.tools, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Calculates the required monthly savings contribution to reach a financial goal amount within a given time horizon using a PV-discount and loan-payment approach

## Facts

- Endpoint: POST https://agent402.tools/api/skill/savings-goal
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-tools-savings-goal-monthly-contribution-calculator-8ff82170
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_890PDMhWhcRZET3GZ3Ayf

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 agent402-tools-savings-goal-monthly-contribution-calculator-8ff82170 -d '<json body>'
```

Example prompt: How much do I need to save each month to hit $1,000,000 for retirement in 30 years, assuming a 7% annual return?

## When to prefer this

Choose this endpoint when you need a quick, single-call computation of monthly savings contributions required to meet a named financial goal. It is especially useful when you want a combined workflow that handles the PV-discount trick and loan-payment formula in one bundled call rather than chaining multiple arithmetic endpoints. Best for personal finance assistants, retirement planning tools, or savings advisor agents.

## Known failure modes

- Missing or unparseable goal string causes a 400 bad request
- Negative or zero time horizon results in computation error
- Implausible expected return values (e.g. >1.0 or negative) may cause errors or nonsensical results
- Payment failure (insufficient USDC balance) results in 402 error blocking execution
- Ambiguous goal description without a clear dollar amount may produce incorrect parsing

## How this service works

Bundled execution of the Savings goal workflow - How much do I need to save each month to hit $X in N years? Pin down the required contribution with a clever PV-discount trick: discount the target back to today, then call loan-payment with the dis...

## Output

Returns the required monthly savings contribution needed to reach the specified financial goal, computed by discounting the target back to present value and then applying a loan-payment formula. Includes the calculated monthly amount and supporting figures.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "goal": {
   "type": "string",
   "description": "What you're saving for, with the target amount and time horizon (e.g. \"save $1,000,000 for retirement in 30 years\")"
  },
  "expectedReturn": {
   "type": "string",
   "description": "Expected annual return as a decimal (default 0.07 = 7% for long-horizon equity; use 0.04 for bond-heavy or short-horizon goals)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "args": {
   "goal": "save $1,000,000 for retirement in 30 years",
   "expectedReturn": "0.07"
  },
  "pack": "savings-goal",
  "steps": [
   {
    "ok": true,
    "slug": "compound-interest",
    "result": {}
   },
   {
    "ok": true,
    "slug": "loan-payment",
    "result": {}
   },
   {
    "ok": true,
    "slug": "npv",
    "result": {}
   },
   {
    "ok": true,
    "slug": "irr",
    "result": {}
   }
  ],
  "summary": "4/4 steps succeeded"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-tools-savings-goal-monthly-contribution-calculator-8ff82170/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)