{"uid":"cap_GcuRo2c4cJ8y-qwhErcbs","slug":"delx-commerce-binary-ev-no-calculator-0b468eab","name":"Delx Commerce — Binary EV (No) Calculator","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/binary-ev-no?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"stake":{"type":"integer","description":"Input field: stake."},"true_prob":{"type":"number","description":"Input field: true prob."},"market_price":{"type":"number","description":"Input field: market price."}}},"responseSchema":{"type":"json","example":{"ev":-13.46153846153848,"stake":100,"schema":"delx/util-binary-ev-no/v1","shares":192.3076923076923,"no_price":0.52}},"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_si604-K6w7IsdenJhDcv8","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":"Calculates the expected value (EV) of buying 'No' shares in a binary prediction market given stake, true probability, and market price.","exampleAgentPrompt":"What's the expected value of buying No shares in a binary prediction market if I stake 100, my estimated true probability of Yes is 40%, and the current market price for No is 0.52?","exampleUseCases":[{"title":"Evaluating a No bet edge","prompt":"I'm looking at a binary prediction market where the current No price is 0.52 and I think the real probability of Yes is 35%. If I stake 200, what's my expected value on the No side?"},{"title":"Checking if a No trade is profitable","prompt":"Is it worth buying No on this market? Market No price is 0.48, I believe the true probability of the event happening is 60%, and I want to stake 50."},{"title":"Comparing EV before placing a wager","prompt":"Before I commit to this No position, can you calculate the expected value? My stake is 500, I think there's a 30% chance Yes resolves true, and the current No price in the market is 0.55."}],"resultDescription":"Returns a JSON object containing the computed expected value (ev, which can be negative indicating a losing bet), the original stake, the number of No shares received, the No price used, and a schema identifier string (delx/util-binary-ev-no/v1).","failureModes":["Missing required fields (stake, true_prob, or market_price) returns a validation error","true_prob outside [0,1] range may cause calculation errors or invalid results","market_price outside valid range (0,1) may yield nonsensical share calculations","Network or payment failure (402 not settled) results in no response","Integer stake of 0 may produce division errors"],"whenToPreferThis":"Use this endpoint when you need a fast, cheap, deterministic calculation of expected value specifically for the 'No' side of a binary prediction market. Prefer it over building your own EV formula when you want verifiable, pay-per-use computation with no API key or signup required, and you are operating on Base or Solana with USDC via x402 micropayments.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:53:56.440Z","isFirstParty":false,"canonicalSlug":"delx-commerce-binary-ev-no-calculator-0b468eab"}