{"uid":"cap_e3YpchR0jXl8-swaNkz-Q","slug":"delx-commerce-evm-batch-duplicate-nonce-check-c169a641","name":"Delx Commerce EVM Batch Duplicate Nonce Check","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/evm-batch-duplicate-nonce-check?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"nonces":{"type":"array","items":{"type":"integer"},"maxItems":256,"description":"Nonces supplied to EVM Batch Duplicate Nonce Check; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"unique":false,"duplicate_nonces":[11]},"schema":"delx/util-evm-batch-duplicate-nonce-check/v1","status":"advisory","evidence":{"retained":false,"input_sha256":"93258878a4b3e2c7cf1c455a9ed9b67ff3017ff1d070d0d1a079a29ac92b1af4","external_calls":0},"operation":"evm_preflight:evm_batch_duplicate_nonce_check"}},"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_LNuyGgQgKmT7T6D9j_ghA","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":"Checks a batch of up to 256 EVM nonces for duplicates, returning which nonces appear more than once — useful as a pre-flight validation before submitting EVM transactions.","exampleAgentPrompt":"Check these nonces for duplicates before I submit my EVM batch: [3, 7, 11, 11, 22, 3] — I need to know if any repeat and which ones they are.","exampleUseCases":[{"title":"Pre-flight nonce check before batch send","prompt":"Before I broadcast this batch of 50 EVM transactions, check these nonces for duplicates: [0, 1, 2, 3, 4, 5, 3, 7] — tell me if any repeat and which ones so I can fix them first."},{"title":"Automated agent transaction validation","prompt":"My agent just queued up nonces [10, 20, 30, 40, 20, 50] for a multi-step EVM operation — verify there are no duplicate nonces in that list before it submits anything."},{"title":"Debugging a failed batch submission","prompt":"My last EVM batch failed and I suspect duplicate nonces — can you check this list [100, 101, 102, 100, 103, 102] and tell me exactly which nonces appeared more than once?"}],"resultDescription":"Returns a JSON object indicating whether all nonces in the batch are unique (unique: true/false), a list of any duplicate nonce values found, the operation name, a status field, and evidence metadata including whether inputs were retained (always false) and a SHA-256 hash of the input for verifiability.","failureModes":["Array exceeds 256 items — request rejected","Non-integer values in nonce array — validation error","Empty nonce array — may return trivially unique result","Malformed JSON body — 400 bad request","Payment not included or insufficient — 402 payment required"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap, privacy-preserving pre-flight check for EVM nonce uniqueness before submitting a batch of transactions. It processes data in-memory without retention, provides a verifiable input hash, and charges only $0.001 USDC per call — ideal for automated agents that need lightweight transaction validation without running the check locally.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T00:54:04.440Z","isFirstParty":false,"canonicalSlug":"delx-commerce-evm-batch-duplicate-nonce-check-c169a641"}