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Delx Sigmoid
x402
Delx Sigmoid is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Computes the sigmoid (logistic) function of a numeric input, returning a probability value between 0 and 1.
Price / call$0.001
Success—
StatusUnknown
How this service works
Sigmoid 1/(1+e^{−x}) back to probability space. Call when mapping model scores into probabilities without ML frameworks. Returns probability from score as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Output
Returns a JSON object containing the original input value x, the computed sigmoid probability (a float between 0 and 1), and a schema identifier string 'delx/util-sigmoid/v1'.
Example use cases
Logit to probability conversion
“I have a raw logit score of -1.5 from my model output — can you run sigmoid on it to get the probability?”
Neural network activation step
“Apply the sigmoid activation function to x = 4.2 so I can use the result as the final layer output of my classifier.”
Normalizing a custom score
“I have a custom relevance score of 0.0 and I want to map it to a 0–1 probability using the sigmoid function — what does sigmoid(0) give me?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/sigmoidWhen to prefer
Choose this endpoint when an agent needs a reliable, metered sigmoid computation without running local math libraries — especially useful in sandboxed or stateless agent environments where importing numpy or scipy is unavailable, or when a governed, auditable math call is required for compliance or reproducibility.
Side effects
- Missing or non-numeric x field returns a validation error
- Extremely large positive or negative x values may return probability near 1.0 or 0.0 due to floating-point limits
- Passing a non-number string as x causes a type error
- Network or payment failures result in 402 or 5xx responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| x | number | Input field: x. |
Output
Schema · Response
{
"type": "json",
"example": {
"x": 0.5,
"prob": 0.6224593312018546,
"schema": "delx/util-sigmoid/v1"
}
}Tags
x402
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