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x402-toolbox Factorial Calculator
x402
x402-toolbox Factorial 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 the factorial of a given non-negative integer, returning the exact result deterministically via a pay-per-call x402 endpoint.
Price / call$0.002
Success—
StatusUnknown
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
A JSON object with an 'ok' boolean indicating success, a 'paid' boolean confirming the x402 micropayment was processed, and the computed factorial value for the given input integer.
Example use cases
Combinatorics permutation count
“I need to know how many ways I can arrange 10 items in a sequence — can you calculate 10 factorial for me?”
Probability denominator computation
“For my probability calculation I need the exact value of 20 factorial — can you compute that and give me the number?”
Large integer factorial lookup
“What is the factorial of 25? I need the exact integer value, not an approximation.”
Technical details
Endpoint
GEThttps://x402-toolbox.shablony-pro.workers.dev/math/factorial-calculator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a deterministic, serverless factorial computation with no signup or API key required — payment via USDC on Base (x402) serves as authentication. Ideal for AI agents that need occasional math utility calls without managing credentials, or when embedding factorial computation into a pay-per-use agent workflow.
Side effects
- Invalid or missing integer input returns an error response
- Negative integer input may return an error since factorial is undefined for negatives
- Payment failure via x402 returns a 402 status before computation occurs
- Extremely large integers may cause overflow or timeout
- Malformed schema parameter causes a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| schema | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true
}
}Tags
x402
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