What you can build
- Wallets for your users — issue each of them a dedicated Rex account number (Virtual Accounts), fund it, move money between accounts, and send to other banks.
- Real-time notifications — subscribe a webhook to be notified the moment money moves, signed so you can verify it really came from Rex (Webhooks).
Get your first account
1
Register
Register with your business
name, email, and a password. You’ll get a 6-digit OTP by email.
2
Verify your email
Verify the OTP to activate your account.
3
Log in
Log in to get a bearer token — see Authentication for what it can and can’t do.
4
Complete onboarding
Save your business information,
add a compliance representative,
upload the documents your business type requires (see the
Going Live Checklist), sign the
agreement, and
submit.
5
Build in sandbox
While your application is under review, everything works in
sandbox —
fund your test balance
and start creating accounts and moving money. See Sandbox vs. Live.6
Go live
Once approved, switch your environment to live
and repeat the same integration against real money.
Base URLs
Where to go next
- Authentication — how tokens work, and one thing worth reading before you build against this.
- Errors — the one response shape every endpoint shares.
- Webhooks Overview — get notified instead of polling.