{"uid":"cap_2Pa5VXtj8yOsHeh8JVLTY","slug":"signalharness-wallet-nonce-gap-analyzer-f1d00451","name":"SignalHarness Wallet Nonce Gap Analyzer","description":"Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.","url":"https://signalharness.ai/api/agent/services/wallet_nonce_gaps/invoke","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"wallet_nonce_request":{"type":"string","maxLength":65536,"minLength":2}}},"responseSchema":{"type":"json","example":{"replay":false,"result":{"warnings":["Pending and replaced transactions may affect interpretation."],"service_id":"wallet_nonce_gaps","evidence_scope":"caller_supplied_data","wallet_nonce_gaps":"{\"duplicates\":[\"3\"],\"maximum_nonce\":\"3\",\"minimum_nonce\":\"1\",\"missing\":[\"2\"],\"truncated\":false}"},"status":"succeeded","receipt":{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","usage":[],"status":"succeeded","network":"eip155:8453","artifacts":[],"endedAtMs":0,"latencyMs":0,"paymentId":"example-payment","receiptId":"example-receipt","requestId":"example-request","serviceId":"wallet_nonce_gaps","executionId":"example-execution","startedAtMs":0,"amountAtomic":"5000","resultSha256":"9f0f1ece534a8caa2af856fb92d80a59f8de15c958384a7dff70d6e27a273e9f","serviceVersion":"1.0.0","settlementReference":"0x0000000000000000000000000000000000000000000000000000000000000000"},"artifacts":[],"requestId":"example-request","executionId":"example-execution"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hmdzJhY6pu2yyaQ49Dwmi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Analyzes a wallet's transaction nonce history to identify gaps, inconsistencies, or anomalies that could indicate replay risks or stuck transactions.","exampleAgentPrompt":"Can you check this wallet's nonce history for any gaps or missing nonces that might be causing transactions to get stuck or indicate a replay risk?","exampleUseCases":[{"title":"Diagnosing stuck on-chain transactions","prompt":"My Ethereum wallet has a pending transaction that won't confirm — can you analyze the nonce data I'm providing to see if there are any gaps or out-of-order nonces causing it to be stuck?"},{"title":"Pre-deployment wallet security audit","prompt":"Before I deploy my smart contract, I want to audit this wallet's nonce sequence to make sure there are no gaps or anomalies that could indicate a security issue or replay vulnerability."},{"title":"Monitoring agent wallet nonce integrity","prompt":"I'm running an automated agent that sends transactions — can you check its nonce history for any gaps or missing values that might cause future transactions to fail?"}],"resultDescription":"Returns a JSON object containing a 'wallet_nonce_gaps' field with identified gap details, a list of warnings, an evidence scope indicator ('caller_supplied_data'), a replay risk boolean flag, and a full execution receipt including payment confirmation, latency, and a SHA-256 hash of the result for verification.","failureModes":["Invalid or malformed wallet_nonce_request input returns an error","Empty or too-short input (below 2 characters) rejected by schema validation","Malformed nonce data that cannot be parsed results in failed status","Payment failure via x402 protocol prevents execution","Network issues on Base (eip155:8453) may delay settlement"],"whenToPreferThis":"Choose this endpoint when you need to programmatically detect nonce gaps or sequence anomalies in a wallet's transaction history — especially when diagnosing stuck transactions, auditing wallet security pre-deployment, or monitoring an automated agent's on-chain activity. It is particularly suited to agent-native workflows that need structured, verifiable output (SHA-256 receipt) and micropayment-gated access via x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T13:06:53.713Z","isFirstParty":false}