# x402-toolbox ROI Calculator

> x402-toolbox ROI Calculator is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Computes return on investment (ROI) given financial inputs, returning a deterministic result via a pay-per-call x402 micropayment model.

## Facts

- Endpoint: GET https://x402-toolbox.shablony-pro.workers.dev/math/roi-calculator?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-toolbox-roi-calculator-351301e0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PbO_Cb5o9O3pXBc5jTY_i

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 x402-toolbox-roi-calculator-351301e0
```

Example prompt: Can you calculate the ROI for an investment where I put in $5,000 and got back $7,500?

## When to prefer this

Choose this endpoint when you need a quick, deterministic ROI calculation without signup or API key management, and you can pay $0.001 USDC per call via x402 on Base. Ideal for AI agents that need autonomous financial computation without credential overhead.

## Known failure modes

- Missing or malformed schema input returns an error or empty result
- Invalid numeric values (e.g. zero initial investment) may cause division-by-zero errors
- Payment failure via x402 protocol returns a 402 response requiring valid USDC payment on Base
- Malformed query parameters may return a 400-level error

## How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

## Output

Returns a JSON object with ok: true and paid: true along with the computed ROI result, typically expressed as a percentage or ratio based on the provided financial inputs.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "schema": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-toolbox-roi-calculator-351301e0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-toolbox.shablony-pro.workers.dev](https://www.zero.xyz/host/x402-toolbox.shablony-pro.workers.dev/llms.txt)