{"uid":"cap_NbUPOuJd0GWpHW4dX_9Rt","slug":"vealth-kelly-sizer-half-kelly-position-sizing-00692fd5","name":"Vealth Kelly Sizer — Half-Kelly Position Sizing","description":"kelly-sizer (CDP-settled mirror) — Half-Kelly position sizing with 12+ strategy normalizers","url":"https://vealth.net/.well-known/vealth/cdp/kelly-sizer","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"edge":{"type":"number"},"bankroll":{"type":"number"},"confidence":{"type":"number"}}},"responseSchema":null,"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_MmW9ad8Buq9w_D7u03Z_q","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 Half-Kelly optimal position size given edge, bankroll, and confidence across 12+ strategy normalizers","exampleAgentPrompt":"I have a $50,000 bankroll, my edge on this trade is 0.08, and I'm 75% confident in my estimate — use half-Kelly position sizing to tell me how much to allocate.","exampleUseCases":[{"title":"Size a sports bet with confidence","prompt":"I want to bet on an upcoming game where I estimate my edge is about 12% and I'm 80% confident in that edge. My current bankroll is $8,000 — how much should I put on this bet using half-Kelly sizing?"},{"title":"Allocate capital across quant strategies","prompt":"I'm running three different quant strategies and need to figure out position sizes for each. My bankroll is $200,000, the edges are 0.05, 0.09, and 0.15 respectively, and my confidence levels are 70%, 85%, and 60% — can you use half-Kelly with normalization across all three to tell me how much to deploy in each?"},{"title":"Right-size a volatile crypto trade","prompt":"I'm looking at a crypto trade where I think I have about a 10% edge but I'm only 65% sure about my model given how noisy the market is. My total trading bankroll is $25,000 — what's the half-Kelly optimal amount I should risk on this position?"}],"resultDescription":"Returns a Half-Kelly-adjusted position size recommendation, normalized across 12+ strategy types, indicating the optimal fraction or dollar amount to deploy given the supplied edge, bankroll, and confidence level.","failureModes":["Missing required field (edge, bankroll, or confidence) returns a 400-level error","Edge value outside valid range (e.g. negative or >1) may return validation error","Payment not processed or insufficient USDC balance causes x402 payment failure","Confidence value out of [0,1] range may cause normalization error"],"whenToPreferThis":"Choose this endpoint when you need a principled, Half-Kelly-normalized position size that accounts for both raw edge and confidence uncertainty, especially across diverse strategy types. Prefer it over a plain Kelly calculator when managing a multi-strategy portfolio or when you want built-in normalization across 12+ strategy archetypes.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:41:35.816Z","isFirstParty":false}