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fittings ABA Routing Number Validator
x402
fittings ABA Routing Number Validator is a paid API for AI agents from fittings.sh, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-10).
Validates a US ABA routing number via its 3-7-1 check digit algorithm and decodes its Federal Reserve district and institution class.
Price / call$0.004
Success—
StatusUnknown
How this service works
Validate a US ABA routing number by its 3-7-1 check digit and decode its Federal Reserve district and institution class.
Output
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.
Example use cases
ACH payment routing validation
“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?”
Fintech onboarding bank verification
“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?”
Fraud screening for banking credentials
“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?”
Technical details
Endpoint
GEThttps://fittings.sh/v1/aba/routing-validate?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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