{"uid":"cap_flQCI1QH_Fd0TM-bZX5lM","slug":"delx-seeded-percentage-rollout-b6d5074c","name":"Delx Seeded Percentage Rollout","description":"Seeded Percentage Rollout: Seeded Percentage Rollout evaluates stable inclusion in a percentage rollout from bounded caller-supplied values without an external provider. Call Seeded Percentage Rollout when an agent needs a reproducible decision that another run can independently replay. Returns the deterministic selection plus seed provenance, population bounds, and the operation-specific outcome for Seeded Percentage Rollout as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base.…","url":"https://api.delx.ai/api/v1/x402/seeded-percentage-rollout","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"seed":{"type":"string","maxLength":8192,"description":"Seed supplied to Seeded Percentage Rollout; used only for this bounded calculation and processed in memory without retention."},"subject":{"type":"string","maxLength":8192,"description":"Subject supplied to Seeded Percentage Rollout; used only for this bounded calculation and processed in memory without retention."},"percentage":{"type":"number","description":"Percentage supplied to Seeded Percentage Rollout; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"included":false,"bucket_percent":18.47354188710196},"schema":"delx/util-seeded-percentage-rollout/v1","status":"pass","evidence":{"retained":false,"input_sha256":"81678a13647db7a4f1b151b8288397c3c5f872a52bed79342f44fc6eb2ea00fe","external_calls":0},"operation":"seeded_decision:seeded_percentage_rollout"}},"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_LERwiXZG37JQLxjj9pLcf","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":"Deterministically decides whether a subject is included in a percentage rollout based on a seed and percentage threshold, returning a boolean result and bucket value.","exampleAgentPrompt":"Check whether user ID 'user_8821' is included in the 'beta-dashboard' feature rollout set at 25% — use 'beta-dashboard' as the seed and 'user_8821' as the subject.","exampleUseCases":[{"title":"Gradual feature flag rollout","prompt":"I'm rolling out a new checkout flow to 10% of users — check if customer ID 'cust_44902' should see it, using 'checkout-v2' as the seed and 10 as the percentage."},{"title":"Canary deployment traffic split","prompt":"For my canary deployment called 'api-v3-canary', check if server instance 'node-17' falls within the 5% slice — use 'api-v3-canary' as the seed and 5 as the percentage."},{"title":"Reproducible A/B experiment assignment","prompt":"I need to reproducibly assign user 'alice@example.com' to experiment group A or B for my 'summer-promo' test — check if they're in the 50% bucket using 'summer-promo' as the seed."}],"resultDescription":"Returns a JSON object with an 'included' boolean indicating whether the subject falls within the specified percentage, a 'bucket_percent' float showing the subject's computed bucket value, an operation name, a schema version, a status field ('pass'), and evidence including input SHA-256 hash, a 'retained: false' flag confirming no data is stored, and an external_calls count.","failureModes":["Missing required fields (seed, subject, or percentage) return a validation error","Percentage value out of 0–100 range may return an error or unexpected behavior","Network timeout or service unavailability returns a connection error","Invalid data types (e.g. non-numeric percentage) cause schema validation failure"],"whenToPreferThis":"Choose this endpoint when you need a deterministic, reproducible bucketing decision for feature flags, A/B tests, or gradual rollouts — especially when you need auditability (SHA-256 evidence) and a guarantee that no input data is retained. Prefer this over a random number approach when you need the same subject to always land in the same bucket for a given seed, or when you need a lightweight, stateless computation without managing your own hashing logic.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T19:00:50.361Z","isFirstParty":false}