What can the eSIM API do?

Create customers and plans, issue eSIM profiles, trigger eSIM instant activation, manage ICCIDs, set APN routing, read usage and run subscription billing. Anything the dashboard can do, the API can do.

Is there an eSIM SDK for mobile apps?

Yes. The eSIM SDK wraps profile install, activation status and plan management so your users never leave your app, and it works alongside the REST API for server-side logic.

Can we white label eSIM for our own app?

Yes. Branding, plan names, pricing and the activation flow are yours. Opn stays invisible to your end users.

How does billing work through the API?

The mobile subscription billing API handles recurring plans, add-ons, overage and proration. You can bill your customers yourself or let us invoice on your behalf.

How long does carrier API integration take?

Most teams are activating test lines in a sandbox the same week and live within a few weeks, depending on your commercial and compliance steps.

Opn.

Developer platform

eSIM API and SDK for embedded connectivity.

Ship mobile connectivity inside your product. Our eSIM API and SDK cover instant activation, SIM provisioning, ICCID management, APN configuration and billing — so you can embed mobile plans in software without becoming a carrier.

eSIM APIeSIM SDKSIM provisioningAPN configuration APIBilling API

eSIM API and eSIM SDK

A REST eSIM API plus mobile SDKs give your app everything it needs to sell and activate a line. Issue an eSIM profile, deliver a QR or direct-install payload, and get eSIM instant activation in seconds — no shipping, no retail step.

eSIM instant activation and profile download
Global roaming eSIM API for travel and multi-country usage
White label eSIM for apps, fully branded
Physical SIM ordering through the same endpoints

SIM provisioning, ICCID management and APN routing

Full lifecycle control over every line: provision, suspend, resume, swap and retire. ICCID management keeps inventory and assignment in one ledger, while the APN configuration API lets you define APN routing rules per plan, per device or per customer segment.

SIM provisioning and bulk activation
ICCID management and inventory reconciliation
APN configuration API with per-plan APN routing
Usage, throttling and policy events via webhooks

Embedded connectivity for software products

Fintechs, neobanks, device makers and SaaS platforms use our embedded connectivity API to attach connectivity to an existing account. A neobank mobile phone plan feature, a device with data included, a fleet product with pooled data — all the same integration.

Embed mobile plans in software with a few endpoints
Mobile subscription billing API with proration and add-ons
Carrier API integration abstracted behind one contract
Sandbox keys, versioned docs and webhook replay

Questions

Ready when you are.

Tell us what you're building or what you need, and we'll come back with the specifics.

White label MVNO platform MVNO enabler