code402 / tools / aba-routing-check

ABA Routing Number Check (US Fedwire/ACH) — pay-per-call API

Name: code402 — ABA Routing Number Check (US Fedwire/ACH)
Price: 0.000999 USD
Author: code402

$0.000999 per call · 20 free calls/day · no signup · pay with card credits or a signed USDC voucher (x402)

Validate a US ABA routing number by its (3,7,1)-weight mod-10 Fedwire/ACH checksum. Prevents ACH transfer reversals and wire routing errors. Returns signed XDR-1 receipt.

Honest scope: Checksum-verifiable: a real check-digit algorithm runs offline, so a malformed or transposed identifier is rejected deterministically. It does NOT prove the account/record exists or that its holder is honest — pair with your existing fraud process. A valid checksum does not guarantee the routing number is currently assigned to an active bank.

Try it (first 20 calls/day free)

curl -X POST https://code402.dev/v1/tools/aba-routing-check/call \
  -H "content-type: application/json" \
  -d '{"aba_routing":"021000021"}'

No key needed for the free tier. When the free quota is used up, the API replies HTTP 402 with the exact price — agents sign the x402 voucher and retry; humans buy card credits. Every paid response carries a signed receipt you can verify offline.

Run it in the playground (free)Pay by card — credits, no crypto

Input parameters

Field	Type	Meaning
`aba_routing` (required)	string	9-digit US bank routing number.

Response

Top-level fields: tool, valid, normalized, country, reason, scope. Paid responses also carry a signed XDR-1 receipt.

All code402 tools

Machine-readable catalog: llms-full.txt · MCP manifest · OpenAPI. Operated by JUANA LIMITED (UK Co. No. 14043409). Non-custodial: USDC settles payer→seller directly on Base.