{"uid":"cap_E3q3ZA3GSwxja3lIUFA-C","slug":"base-nonce-readiness-check-331a3804","name":"Base Nonce Readiness Check","description":"Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.","url":"https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/base/nonce-readiness","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$","description":"Base account whose transaction nonce should be checked."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"network":{"type":"string"},"product":{"type":"string"},"activity":{"type":"object"},"identity":{"type":"object"},"assessment":{"type":"object"},"provenance":{"type":"object"}}}}}}},"responseSchema":{"type":"json","example":{"network":"eip155:8453","product":"base-nonce-readiness","assessment":{"flags":[],"risk_level":"low","risk_score":0}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wagJNp5PcBBanoQgxlg30","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks and assesses the transaction nonce readiness and risk level for a Base blockchain account address","exampleAgentPrompt":"Before sending that transaction, run a nonce readiness check on my Base wallet 0x1234567890abcdef1234567890abcdef12345678 and tell me if there are any risk flags or issues I should know about.","exampleUseCases":null,"resultDescription":"Returns a JSON object with the network identifier (eip155:8453), product name (base-nonce-readiness), and an assessment object containing a list of flags, a risk_level string (e.g. 'low'), and a numeric risk_score. Additional fields may include activity, identity, and provenance objects.","failureModes":["Missing or malformed address parameter returns validation error","Non-Base address format (not matching ^0x[a-fA-F0-9]{40}$) returns 400 error","Address with no on-chain history may return empty activity data","Network congestion may delay nonce state resolution","Payment not processed (402) blocks the response"],"whenToPreferThis":"Use this endpoint when an autonomous agent or workflow needs to verify that a Base blockchain account's transaction nonce is in a safe, ready state before submitting a transaction — especially in multi-step agent pipelines where nonce conflicts could cause failed or stuck transactions. Prefer this over general blockchain explorers when you need a machine-readable risk assessment with flags and scores rather than raw block data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:35:02.019Z","isFirstParty":false}