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GET /v1/aba

Validate a US ABA routing number

Try it live

10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/financialid-api

It works. Grab an API key and use it in your project.

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Code snippets

curl "https://api.oanor.com/financialid-api/v1/aba" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/financialid-api/v1/aba", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/financialid-api/v1/aba");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/financialid-api/v1/aba",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "valid": true,
        "routing": "021000021",
        "checksum_ok": true,
        "federal_reserve": "Federal Reserve Bank #2"
    },
    "meta": {
        "timestamp": "2026-06-03T17:42:09.088Z",
        "request_id": "e6a3aaa9-8872-4bb1-8812-6a35c9a0b50d"
    },
    "status": "ok",
    "message": "ABA",
    "success": true
}