# SignalDesk AI Compound Interest Calculator

> SignalDesk AI Compound Interest Calculator is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Calculates compound interest and total value given principal, annual rate, compounding frequency, and time period

## Facts

- Endpoint: POST https://x402-agent.kariguetoazul.workers.dev/api/finance/compound-interest?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-compound-interest-calculator-4d7d06f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AxvWedLL0fWrI63EqHp1k

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 signaldesk-ai-compound-interest-calculator-4d7d06f1 -d '<json body>'
```

Example prompt: Can you calculate how much $10,000 will grow to if it earns 5% annual interest compounded monthly over 3 years?

## When to prefer this

Choose this endpoint when you need a straightforward, deterministic compound interest computation from user-supplied inputs without any external data lookups or rate fetching. It is ideal for quick financial projections, educational scenarios, or building financial planning tools where the user already knows the rate and terms. It does not fetch live rates, provide advice, or handle taxes — use it purely as a math engine.

## Known failure modes

- Missing required fields returns an error
- Values outside allowed ranges (e.g. years > 1000, rate > 1000%) are rejected
- Non-numeric inputs cause validation errors
- Zero compounds_per_year is invalid (minimum 1)
- Floating-point precision edge cases for very large principals or very long time periods

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

Returns a JSON object with 'total' (principal plus interest), 'interest' (the interest earned alone), and a 'notice' disclaimer clarifying the result is a pure mathematical calculation from supplied inputs with no tax, investment, or lending advice implied.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "years": {
   "type": "number",
   "maximum": 1000,
   "minimum": 0,
   "description": "Elapsed years."
  },
  "principal": {
   "type": "number",
   "maximum": 1000000000000,
   "minimum": 0,
   "description": "Amount in one consistent currency; floating-point calculation, not an accounting ledger."
  },
  "compounds_per_year": {
   "type": "integer",
   "maximum": 365,
   "minimum": 1,
   "description": "Frequency."
  },
  "annual_rate_percent": {
   "type": "number",
   "maximum": 1000,
   "minimum": 0,
   "description": "Supplied percentage rate, not a fetched or recommended rate."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "total": 1104.941335558327,
  "notice": "Calculation from supplied inputs only; no tax, investment or lending advice.",
  "interest": 104.941335558327
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-compound-interest-calculator-4d7d06f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)