{"uid":"cap_aRZ_822_aeYNLiwP8p8fL","slug":"fittings-aba-routing-number-validator-350d4391","name":"fittings ABA Routing Number Validator","description":"Validate a US ABA routing number by its 3-7-1 check digit and decode its Federal Reserve district and institution class.","url":"https://fittings.sh/v1/aba/routing-validate?utm_source=zero.xyz","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":["routingNumber"],"properties":{"routingNumber":{"type":"string","description":"9-digit ABA routing transit number"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_bmKJ_9zUDzvT8aGOnhbOQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a US ABA routing number via its 3-7-1 check digit algorithm and decodes its Federal Reserve district and institution class.","exampleAgentPrompt":"Can you validate the ABA routing number 021000021 and tell me whether its check digit is correct and which Federal Reserve district and institution class it belongs to?","exampleUseCases":[{"title":"ACH payment routing validation","prompt":"Before I submit this ACH transfer, can you validate the routing number 011000138 — is it a legitimate ABA number, does the check digit pass, and what Federal Reserve district is it in?"},{"title":"Fintech onboarding bank verification","prompt":"A user just entered routing number 122105155 in our bank account form — can you verify it's a valid ABA routing number with a passing 3-7-1 check digit and tell me the institution class?"},{"title":"Fraud screening for banking credentials","prompt":"We received a suspicious bank account submission with routing number 999999999 — can you run the ABA check digit validation and tell me if it's a real, properly structured routing number?"}],"resultDescription":"Returns whether the 9-digit ABA routing number passes the 3-7-1 check digit algorithm, along with decoded metadata including the Federal Reserve district identifier and institution class encoded within the routing number.","failureModes":["Routing number not exactly 9 digits returns a validation error","Non-numeric characters in routing number cause a parse error","Routing number that fails check digit returns invalid status rather than an error","Missing routingNumber query parameter returns a 400 bad request"],"whenToPreferThis":"Use this endpoint when you need to programmatically verify the structural integrity of a US ABA routing number before processing a payment, onboarding a bank account, or storing financial credentials. It is ideal for real-time validation during form submission or fraud screening, as it performs both the mathematical 3-7-1 check digit test and decodes Federal Reserve district and institution class metadata in a single lightweight call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T06:30:47.276Z","isFirstParty":false,"canonicalSlug":"fittings-aba-routing-number-validator-350d4391"}