# Percentage and Multiple Change Calculator

> Percentage and Multiple Change Calculator is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Computes the percentage change and multiple (ratio) between two numeric values via a pay-per-call API.

## Facts

- Endpoint: POST https://twin.unykorn.org/percent-change?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/percentage-and-multiple-change-calculator-3cc884c3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rFCLGHFljYvGOuI1IzKlX

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 percentage-and-multiple-change-calculator-3cc884c3 -d '<json body>'
```

Example prompt: What's the percentage change and growth multiple going from 1200 to 1850?

## When to prefer this

Choose this endpoint when you need a verifiable, receipted computation of percentage and multiple change between two values — particularly in agentic workflows where an on-chain payment receipt provides an audit trail. Prefer this over local math when your pipeline already uses x402 micropayment infrastructure and traceability of each calculation call matters.

## Known failure modes

- Missing 'from' or 'to' parameters returns a validation error
- Division by zero if 'from' value is 0 (undefined percentage change)
- Payment failure on-chain results in 402 response before computation
- Non-numeric string values in from/to fields cause parse errors
- Network timeout if blockchain payment confirmation is slow

## How this service works

Percentage and multiple change between two values — Genesis402 / UnyKorn Operator Network

## Output

Returns a JSON object with ok status, a 'percent-change' type indicator, the computed percentage change and multiple between the two input values, a timestamp, and a blockchain payment receipt including tx_hash, amount in USD, and a receipt ID for auditing.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "params": {
   "type": "object",
   "properties": {
    "to": {
     "type": "string"
    },
    "from": {
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "type": "percent-change",
  "receipt": {
   "tx_hash": "0x<64hex>",
   "amount_usd": 0.001,
   "receipt_id": "g402-<16hex>"
  },
  "generated_at": "<iso8601>"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/percentage-and-multiple-change-calculator-3cc884c3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from twin.unykorn.org](https://www.zero.xyz/host/twin.unykorn.org/llms.txt)