Every US routing number,
in complete detail
Stack runs its own routing number database, richer and better maintained than the public record. Validate any routing number through our API, or license the whole dataset. Sign up to your first production request in under 10 minutes, without speaking to anyone.
Live in ten minutes
The whole point of Stack is that you never have to wait on us. Everything below is self-serve.
Create your account
Sign up with email or Google. No sales call, no demo, no waiting on approval.
Activate your plan
Add a card and start your subscription in the dashboard. Your API key is authorized for live production requests the moment it's active.
Make your first call
Send a routing number, get the full bank record back. Same endpoint you'll ship to production.
curl https://api.stack-ft.com/utilities/banking/bank-lookup \
-H "Authorization: {api_key}" \
-d '{ "routing_number": "031302971" }'Two ways to use our data
Query it live, or license the whole dataset.
Routing Number API
Validate any US routing number in real time and get the full bank record back: name, address, active status, and ACH eligibility. One endpoint, clean JSON, unlimited requests.
License the full database
Want the entire dataset in-house? License our complete routing number database, right down to branch locations and bank websites, delivered as a clean, structured file you can load anywhere. We maintain the data; you get a licensed copy. Available by request.
Why developers trust our data
Most routing number tools wrap the same stale public file. We are the source.
Our own database
Not a repackaged government file. We maintain a proprietary routing number database with more data points per institution than anyone else on the internet, right down to branch locations and bank websites.
Continuously maintained
Banks merge, rename, and change ACH participation constantly. We keep every record current so your validations never quietly go stale.
Production-grade
One predictable REST endpoint, clean JSON, and unlimited requests. Reliable enough to sit directly in your payment and onboarding flows.
Frequently asked questions
What makes Stack's routing number data the most detailed?
We maintain our own proprietary routing number database rather than reselling a static public file, and we track more data points per institution: bank name, active status, ACH eligibility, and address, all kept continuously up to date.
How fast can I be live in production?
About ten minutes. You sign up, start your subscription, and make your first production request, all self-serve without talking to a single person.
Do I need a subscription to use the API?
Yes. Your API key is authorized for live requests while your subscription is active. You can start it yourself in the dashboard in a couple of minutes; it's $99/month with unlimited requests.
How much does the API cost?
It's $99/month with unlimited requests. No per-request fees, no usage tiers, no surprises.
Can I get the whole routing number database?
Yes, by license. We license our full routing number database and deliver a one-time copy you can load anywhere. It goes beyond the API, down to branch locations and bank websites. We retain ownership of the data; you get a license to use it. Email [email protected] with your use case.
Do I need to talk to sales?
No. The API is fully self-serve from sign-up to production. Sales only gets involved if you specifically want to license the full database or a custom arrangement.