{"uid":"cap_GBYHYaoJSSRLR9V4C843N","slug":"routingcheck-hergertsynthora-com-aba-routing-number-validator-6984b83b","name":"routingcheck.hergertsynthora.com ABA Routing Number Validator","description":"Validate a US bank routing number (ABA) deterministically: 9-digit check, ABA mod-10 weighted checksum, Federal Reserve district decode, institution-id extraction. Zero deps, no hallucination. Complements IBAN for international. Ed25519-signed. First 3 calls FREE (X-WALLET).","url":"https://routingcheck.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"routing":{"type":"string","description":"9-digit US routing/ABA number"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"routing_check","result":{"type":"government/primary","valid":true,"routing":"021000021","verdict":"valid","check_digit":"1","fed_meaning":"Federal Reserve Bank district 02","aba_institution_id":"100002","fed_district_symbol":"02"}}},"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_tVJt93HqQVpNIf-p0stPX","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":"Validates a 9-digit US bank ABA routing number using checksum verification, Federal Reserve district decoding, and institution-ID extraction — with no external dependencies.","exampleAgentPrompt":"Before I send this ACH payment, can you validate that routing number 021000021 is a legitimate US bank ABA routing number and tell me which Federal Reserve district it belongs to?","exampleUseCases":null,"resultDescription":"Returns whether the 9-digit ABA routing number passes the mod-10 weighted checksum, the Federal Reserve district decoded from the number, and the extracted institution ID — all computed deterministically with no external calls.","failureModes":["Routing number is not exactly 9 digits — validation fails with format error","Routing number fails ABA mod-10 weighted checksum — returned as invalid","Malformed or non-numeric input — request rejected","Missing X-WALLET header after free tier exhausted — payment required error","Network timeout or service unavailability"],"whenToPreferThis":"Use this endpoint when you need fast, deterministic, offline-style validation of a US ABA routing number before executing an ACH or wire payment. Prefer it over a database-lookup service when you need guaranteed availability and no external dependency. Complements IBAN validation for international accounts.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:36:28.104Z","isFirstParty":false}