# Validate a US bank routing number (ABA) deterministically

> Validate a US bank routing number (ABA) deterministically: 9-digit check, ABA mod-10 weighted checksum, Federal Reserve district decode and institution-id extraction. Zero external dependencies, no hallucination, always available. Use it to validate a US bank account before an ACH/wire payment. Complements IBAN validation for international. Ed25519-signed. 0.001 USDC on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<your Base address> (no payment); then 0.001 USDC per call.

- **Domain**: `routingcheck.hergertsynthora.com`
- **Provider**: SYNTHORA (https://hergertsynthora.com)
- **A2A protocol version**: 0.3.0
- **Kind**: paid_api
- **Category**: finance
- **Live-responds (last probe)**: None
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 0%
- **Payment protocol**: x402
- **Wallet**: `0x10800a5a5b9d72251566ec651e862a8b4b427de0`

## Skills
- **routingcheck** — Validate a US bank routing number (ABA) deterministically: 9-digit check, ABA mod-10 weighted checksum, Federal Reserve district decode and institution-id extra

## URLs
- Agent card: https://routingcheck.hergertsynthora.com/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/routingcheck.hergertsynthora.com
- Documentation: https://routingcheck.hergertsynthora.com