Bank Routing Search API: Find ABA Numbers by Name

A bank routing search API returns ABA numbers from a partial bank name — not a single routing validate. On BankDataStack that is POST https://www.bankdatastack.com/api/v1/routing/database/bank with header X-API-Key and JSON. Official success sample: bank=CITIZENS → CITIZENS NATIONAL BANK, Crockett TX, 113110984.

Starter is $49.99/mo (1,000 calls, then $0.002) with a 7-day trial. Docs: bankdatastack.com/docs. MCP worker host mcp.bankdatastack.com did not resolve on 17 September 2026 — do not assume MCP is live.

Request: official CITIZENS query

curl -X POST "https://www.bankdatastack.com/api/v1/routing/database/bank" \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"bank":"CITIZENS","limit":25}'

Response: official sample (first row)

{
  "status": "success",
  "message": "Found 25 routing number(s) for bank: CITIZENS",
  "count": 25,
  "limit": 25,
  "data": [
    {
      "routingNumber": "113110984",
      "bank": "CITIZENS NATIONAL BANK",
      "address": "1320 LOOP 304 EAST",
      "city": "CROCKETT",
      "state": "TX",
      "zip": "75835",
      "phone": "(936) 544-9661",
      "dateOfRevision": "042104",
      "newRoutingNumber": null,
      "active": true
    }
  ]
}

Partial match is supported (CHASE, CITIZENS). Limit is 1–10 on the public docs table; the LLM/example body uses 25 — send what your live docs accept.

Go live

Search ABA numbers with a BankDataStack key →