NXTL for Business Connectivity API · Pooled balance · Global eSIMs

One company balance, every traveller online.

Issue prepaid eSIMs to employees, customers, or fleets straight from your platform. One pooled balance, one ledger, one API — no surprise roaming bills, no SIM logistics, no per-seat tax.

Apply for API access Read the API docs →

Up to: 70%
Time to live: < 24h
Coverage: 180+
API endpoints: 40+

What you get

Everything connectivity teams need, in one platform.

Built for finance teams who want predictability, ops who want control, and engineers who want a clean API to wire into their stack.

Pooled prepaid balance

Top up once, draw down forever. Every eSIM debits the same company pool, so finance reconciles one ledger instead of N invoices.

Global eSIMs in seconds

Issue, suspend, resume, exchange, and terminate from REST or the portal. QR codes are generated and emailed instantly to your end customer.

Bulk operations that scale

POST /esims/bulk-issue accepts hundreds of eSIMs per call, returns a job id, and emits per-eSIM outcomes via webhook so partial-success is first-class.

Usage analytics on tap

Per-eSIM aggregates, itemised data events, and chart-ready time series — drive your own dashboards or pipe straight into your data warehouse.

Threshold rules + auto-suspend

Define balance and per-eSIM usage rules. Email + signed webhook on every breach, with optional automatic eSIM suspension to cap runaway spend.

Production-grade security

Scoped API keys, idempotent writes, HMAC-SHA256 webhook signing with timestamped headers, replay-window enforcement, and a partner-scoped audit log.

eSIM exchange built in

Replace lost or compromised devices in a single call. The old eSIM is decommissioned, wallet balance returned to your pool, and a fresh QR is delivered.

Tiered coverage policies

Premium tiers for executives, efficient tiers for high-volume field teams. Change tier on the fly via PATCH or bulk endpoint without re-issuing the eSIM.

Webhooks that don't lie

Filtered event subscriptions, exponential-backoff retries with a dead-letter view, signed deliveries, and one-click replay from the portal.

Built for engineers

A REST API your team will actually like.

Idempotent writes, signed webhooks with timestamp + replay protection, and a published OpenAPI spec. The same endpoints power our partner portal and your integrations.

Sample endpoints

POST /esims issue a single eSIM
POST /esims/bulk-issue async batch issuance up to 1000
POST /esims/{iccid}/suspend pause data instantly
PATCH /esims/{iccid}/tier change network tier
GET /usage/esims?since=… per-eSIM aggregates
GET /usage/timeseries?days=30 chart-ready daily totals
POST /topup fund pool from prepaid budget
POST /thresholds spend / usage alert rules
GET /audit?action=esim. partner-scoped activity feed

Base URL: https://nxtlsim.com/api/v1/

Browse the full reference →

curl · issue 50 eSIMs

# Pre-flight cost estimate
curl -X POST "https://nxtlsim.com/api/v1/esims/estimate" \
  -H "X-NXTL-Key: $NXTL_KEY" \
  -d '{"quantity":50,"tier":"international"}'

# Issue them — 202 Accepted, async job
curl -X POST "https://nxtlsim.com/api/v1/esims/bulk-issue" \
  -H "X-NXTL-Key: $NXTL_KEY" \
  -H "Idempotency-Key: q2-launch" \
  -d '{"quantity":50,"tier":"international",
       "client_reference":"fleet-q2"}'

Use cases

Wherever your customers go online.

Travel & mobility platforms

Bundle prepaid data with flights, insurance, or memberships. Your brand stays front and centre while NXTL powers issuance behind the scenes — no carrier badging, no per-traveller billing surprises.

Distributed enterprises

Give roaming teams predictable connectivity with one policy, one balance, and instant suspend when devices change hands or get lost.

Connected hardware & IoT

Ship globally with pooled economics you can model before you build. Suspend a stolen unit, exchange a defective eSIM, and reconcile usage by serial.

Resellers & MVNO partners

White-label our infrastructure, keep your customer relationship. Volume rates, scoped API keys per environment, and a partner portal you can hand to support.

How it works

Three steps from kick-off to production.

01
Apply & fund

Tell us who you are and what you need. Most accounts are reviewed within one business day. Fund your pool with a card top-up — or a wire transfer for invoiced billing.
02
Integrate or run from the portal

Issue your first eSIMs from the dashboard the same day. When you're ready, generate scoped API keys and wire the API into your booking, HR, or device-management platform.
03
Launch and scale

Subscribe to webhooks, set threshold alerts, and scale issuance without renegotiating contracts. Add new business units behind their own API keys when you grow.

NXTL vs traditional roaming

Built for control, not invoices.

NXTL Business

Prepaid pool — never overspend, ever
eSIMs in seconds via REST
Per-eSIM usage you can audit
Suspend / exchange / reissue on demand
Threshold alerts + auto-suspend
Signed webhooks, idempotent writes

Traditional carrier roaming

Surprise post-paid invoices, country by country
Physical SIMs and shipping logistics
Spreadsheet reconciliation, late by 30 days
Call centre to suspend a single eSIM
No alerts until the bill arrives
Integration via FTP and patience

How we charge

Pay-as-you-go. No subscriptions, no per-seat tax.

You fund a prepaid pool, every action is debited from the same balance, and the rates below are the only fees you ever see.

Per eSIM issued $2.00

One-time fee debited from your pool when an eSIM is provisioned. Same fee for single-issue and bulk-issue calls.

Per eSIM exchanged $2.00

Lost device or compromised eSIM? Old wallet balance is automatically returned to your pool; you only pay the exchange fee for the replacement.

Data usage tier & geo

Wholesale per-GB rates that vary by tier and destination. Premium tiers route through tier-1 networks; efficient tiers minimise cost on high-volume fleets.

Enterprise

Volume rates, invoiced billing, dedicated onboarding.

High-volume customers get tailored per-GB pricing, net-30 invoicing instead of card top-ups, multi-brand partner separation, and a dedicated technical contact for integration support.

Talk to sales

Frequently asked questions

Everything we get asked, up front.

How long does approval take?

Most applications are reviewed within one business day. We confirm company details, set up your partner pool, and email you the moment API access is enabled.

Can we manage multiple brands or subsidiaries?

Yes — issue separate API keys per environment or business unit, each scoped to its own webhook endpoint. Larger groups can also have separate partner pools, isolated for billing and audit.

How do payments work?

Top up your pool from any saved or new card on the customer portal — the same checkout that powers retail purchases, with full support for credit and debit cards, digital wallets and select cryptocurrencies. Enterprise customers can switch to invoiced wire transfers with net-30 terms; every top-up generates a downloadable VAT invoice.

Can we white-label the customer experience?

You own the customer-facing UX, QR delivery, and policy copy; NXTL powers issuance, connectivity, and ledgering under the hood. Branded customer emails are configurable per partner.

What happens if a webhook fails?

We retry with exponential backoff up to five attempts and surface every delivery in your portal — with a one-click replay button when your endpoint comes back online.

Do we need to be a developer to start?

No. The partner portal lets non-technical staff issue, suspend, exchange, and audit eSIMs without any code. Wire up the API later when you want issuance baked into your own product.

Ready when you are

Let's get your business online.

Tell us where your team or customers travel and how many eSIMs you expect. We will respond with concrete next steps within one business day.

NXTL for Business

Issue data eSIMs from your own systems

Apply for a prepaid B2B account with pooled data balance, REST API access, and webhooks. Sign in to submit your company details — we review applications within one business day.