{"uid":"cap_7QNxnO9M410z0uOabWQBt","slug":"delx-seeded-matrix-cell-e545e181","name":"Delx Seeded Matrix Cell","description":"Seeded Matrix Cell: Seeded Matrix Cell selects one reproducible row and column inside matrix bounds from bounded caller-supplied values without an external provider. Call Seeded Matrix Cell 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 Matrix Cell as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stat…","url":"https://api.delx.ai/api/v1/x402/seeded-matrix-cell?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"rows":{"type":"integer","description":"Rows supplied to Seeded Matrix Cell; used only for this bounded calculation and processed in memory without retention."},"seed":{"type":"string","maxLength":8192,"description":"Seed supplied to Seeded Matrix Cell; used only for this bounded calculation and processed in memory without retention."},"columns":{"type":"integer","description":"Columns supplied to Seeded Matrix Cell; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"row":3,"column":3},"schema":"delx/util-seeded-matrix-cell/v1","status":"pass","evidence":{"retained":false,"input_sha256":"e8e85927a02e5f114b46f474a41aacbab9685306c2b1437ffb5f66d3672041c5","external_calls":0},"operation":"seeded_decision:seeded_matrix_cell"}},"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__iwCwADV4OyQL8d0H5EWi","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 selects a matrix cell (row, column) from a seed string and matrix dimensions, returning a reproducible row/column coordinate.","exampleAgentPrompt":"Use the seeded matrix cell endpoint with the seed 'user-abc-123' and a 5-row by 10-column matrix to deterministically pick a cell for this user.","exampleUseCases":[{"title":"Deterministic user shard assignment","prompt":"Given the user ID 'usr-7f3a9b', map them to a cell in a 4-row by 8-column grid so I can consistently route them to the same processing bucket every time."},{"title":"Reproducible experiment cell selection","prompt":"I need to assign experiment variant slots — use the seed 'exp-trial-42' to deterministically pick a cell in a 3-row by 3-column matrix for my A/B test grid."},{"title":"Content slot assignment from a key","prompt":"Pick a grid cell for the content item with key 'product-landing-hero-v2' using a 6-row by 6-column matrix so the same item always lands in the same slot."}],"resultDescription":"Returns a JSON object containing the selected row and column indices derived from the seed, along with the operation name, status, and an evidence block confirming no external calls were made and no input was retained, including a SHA-256 hash of the input for auditability.","failureModes":["Missing or empty seed returns a validation error","Non-integer rows or columns causes a schema rejection","Seed exceeding 8192 characters is rejected","Zero or negative dimension values may produce an error or undefined behavior","Network timeout on the POST request"],"whenToPreferThis":"Choose this endpoint when you need a fast, deterministic, in-memory mapping from an arbitrary string seed to a bounded 2D grid coordinate — ideal for reproducible sharding, slot assignment, or experiment bucketing without storing state. Prefer it over custom hashing code when you want an auditable, governance-friendly result with an evidence block confirming no data retention.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T00:46:28.053Z","isFirstParty":false,"canonicalSlug":"delx-seeded-matrix-cell-e545e181"}