OneOfficeSystem gives your business programmable phone numbers on carrier-grade infrastructure. Buy a number, point inbound to your app, send outbound through us — and pay as you go with prepaid credits.
Built for platforms that resell messaging to their own customers.
Search and buy local and toll-free numbers, then provision them to any organization via API or console.
Inbound is forwarded to your app's webhook; outbound is relayed over carrier-grade routes with delivery receipts.
Load credits in advance and meter every message in and out against your balance, with a full transaction ledger.
Each client business is its own tenant with scoped API keys, rate limits, numbers, and logs.
The same numbers carry voice — softphone tokens and call routing on the roadmap, built in from day one.
We keep the logs: every inbound, outbound, charge, and delivery status, queryable per organization.
Sign in with Google, Apple, or Facebook and get your organization.
Search available numbers and provision one to your org with one call.
Point inbound messages to your app; we deliver them signed and in real time.
Relay outbound through us; top up prepaid credits as you grow.
No packages, no monthly minimums. Load credits in advance and pay per unit — every message, minute, and number is metered against your balance.
One key, one endpoint. Buy a number, send a message, and receive inbound at your own webhook. Scoped per organization, rate-limited, and logged.
Create an accountcurl -X POST https://api.oneofficesystem.com/v1/messages \
-H "Authorization: Bearer oos_live_xxx" \
-H "Content-Type: application/json" \
-d '{
"from": "+18555550100",
"to": "+12145550123",
"body": "Your code is 123456"
}'Sign in with Google, Apple, or Facebook and provision your first number in minutes.
Get started free