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SignalDesk AI Factorial Calculator
x402
SignalDesk AI Factorial 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).
Computes the exact factorial of a non-negative integer n (0 ≤ n ≤ 300) and returns the result as a string
Price / call$0.001
Success—
StatusUnknown
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
A JSON object containing a 'factorial' field with the exact result of n! as a string (e.g. {"factorial": "3628800"} for n=10). Large factorials (e.g. n=300) return very long numeric strings with full precision.
Example use cases
Combinatorics calculation for statistics
“I need to calculate 52 factorial exactly — it comes up in the number of possible orderings of a standard deck of cards. Can you get me the precise integer?”
Verify large factorial for homework
“My math homework asks for the exact value of 25 factorial. Can you compute 25! and give me the full number?”
Boundary test with maximum input
“What is the factorial of 300? I need the complete exact result, not a scientific notation approximation.”
Technical details
Endpoint
POSThttps://x402-agent.kariguetoazul.workers.dev/api/math/factorial?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the exact integer value of a factorial (no floating-point approximation) for values of n up to 300. It is preferable to local computation when the agent environment lacks arbitrary-precision math libraries, or when a verifiable, paid API result is required for audit or evidence purposes. Avoid if n > 300 or if approximate scientific notation is acceptable.
Side effects
- Input n exceeds maximum of 300 — returns validation error
- Input n is negative — rejected by schema validation
- Non-integer input — schema validation failure
- Payment of 0.001 USDC not fulfilled — x402 payment required error before computation
- Network timeout on Cloudflare Worker edge node
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| n | integer | n. |
Output
Schema · Response
{
"type": "json",
"example": {
"factorial": "3628800"
}
}Tags
x402
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