{"uid":"cap_ysWZa6GTm-BF_hNa5FErt","slug":"delx-commerce-sigmoid-function-api-e5dbdd91","name":"Delx Commerce Sigmoid Function API","description":"Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.","url":"https://commerce.delx.ai/api/v1/x402/sigmoid?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"x":{"type":"number","description":"Input field: x."}}},"responseSchema":{"type":"json","example":{"x":0.5,"prob":0.6224593312018546,"schema":"delx/util-sigmoid/v1"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KYT9XDn8ru0TdNoaQO6GP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the sigmoid (logistic) activation function for a given numeric input, returning the probability value between 0 and 1.","exampleAgentPrompt":"Can you compute the sigmoid of 2.5 for me? I need the probability output.","exampleUseCases":[{"title":"Logit to probability conversion","prompt":"I have a raw model score of -1.2 and I need to convert it to a probability using the sigmoid function — can you do that?"},{"title":"Neural network activation check","prompt":"What's the sigmoid activation value for x = 0.75? I'm manually tracing a neural network layer."},{"title":"Binary classification threshold check","prompt":"I need to know what probability sigmoid gives me for a logit of 3.0 so I can decide whether it crosses my 0.8 classification threshold."}],"resultDescription":"Returns a JSON object containing the original input value (x), the sigmoid-transformed probability (prob, a float between 0 and 1), and a schema identifier string (e.g. 'delx/util-sigmoid/v1') for verifiable result provenance.","failureModes":["Missing or non-numeric 'x' field returns a validation error","Extremely large or small x values may return probabilities indistinguishable from 0 or 1 due to floating-point limits","Payment failure via x402 protocol results in 402 status and no computation","Malformed JSON body returns 400 bad request"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call sigmoid computation without managing any ML runtime or library, especially in agent pipelines that already use USDC micropayments via x402. Ideal for agents that need verifiable, auditable math results on Base or Solana without any API key setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:53:52.974Z","isFirstParty":false,"canonicalSlug":"delx-commerce-sigmoid-function-api-e5dbdd91"}