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FastX402 Percentage Change Calculator
x402
FastX402 Percentage Change Calculator is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-04).
Computes the percentage change and absolute difference between two numeric values
Price / call$0.001
Success—
StatusUnknown
How this service works
200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.
Output
A JSON object containing the original old_value, the new_value, the percentage_change (as a number, e.g. 25 for 25%), and the absolute_difference between the two values.
Example use cases
Monthly sales growth tracking
“Revenue went from 42000 last month to 51660 this month — what's the percentage change and by how much did it grow in absolute terms?”
Stock price drop analysis
“My stock was at 240 last week and is now at 198. What's the percentage decrease and how many points did it fall?”
Website traffic comparison
“My site had 15000 visitors last quarter and 18750 this quarter. Can you calculate the percentage increase in traffic?”
Technical details
Endpoint
GEThttps://fastx402.tools/percentage-change?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, reliable computation of percentage change and absolute difference between two numeric values without setting up any account or API key — especially useful in agentic workflows where math utilities are needed on demand and pay-per-call pricing at $0.001 USDC is preferred over bundled subscriptions.
Side effects
- Missing old_value or new_value query parameters returns an error
- Non-numeric string inputs may cause a parse or computation error
- Division by zero if old_value is 0 (undefined percentage change)
- Payment failure via x402 if insufficient USDC balance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"new_value": 125,
"old_value": 100,
"percentage_change": 25,
"absolute_difference": 25
}
}Tags
x402
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