For System Integrators

Deliver e‑invoicing for your clients on a licensed Access Point.

You design, build and run the integration; Elyonar is the licensed Access Point Provider behind it. Connect once to the Yona Access Point API, and every invoice you submit for a client is validated, given its IRN and QR code, and transmitted to the NRS under our licence.

Talk to us Read the API guide

Live in production, with a sandbox to test first.

Access Point Provider · NITDA/2026/A3HXS0

System Integrator · NITDA/2026/S21ZW0

Not a System Integrator? To use Yona's invoicing inside your own software, build on the Yona API.

Submit an invoice

POST /v1/submissions

curl -X POST https://nrs.useyona.com/v1/submissions \  -H "Authorization: Bearer $TOKEN" \  -H "Idempotency-Key: 7d9f2c1e-4b8a-…" \  -d @invoice.json

202 Accepted

Signed and numbered, on its way

{  "submission_id": "0f3c9a6e-5b2d-…",  "irn": "INV001-94ND90NR-20260929",  "state": "accepted"}

The Yona business app is built on this same API.

Built for the teams that run the integration.

You build, host and support the e-invoicing integration for your clients or your own group. Elyonar is the licensed Access Point that carries it to the NRS.

System Integrators

Deliver e-invoicing projects for your clients, from their ERP or billing system to the NRS, on an Access Point that is licensed and live.

ERP and accounting software vendors

Send the invoices your software already creates to the NRS, for every customer, through one connection.

Enterprise IT teams

Run your own integration for your group and reach the NRS through a licensed Access Point.

Banks, fintechs and marketplaces

Submit invoices on behalf of the businesses you serve, each with its own grant.

What Yona does for you.

One API, one integration, every client. The same Access Point the Yona business app runs on.

Signing and transmission under our licence

Every invoice gets its reference number and QR code and reaches the NRS through Elyonar, a licensed Access Point Provider.

Every client, one integration

Each client selects Elyonar as its Access Point and grants you access. You submit, track, receive and reconcile for all of them.

Receiving

Invoices that other access points send your clients arrive through the same API.

Buyer checks

Confirm a buyer is on the e-invoicing network before you submit.

Signed webhooks

Every status change is pushed to you and signed, so you can verify it came from us.

History import

Bring in a client's earlier invoices from the NRS.

Sandbox first

Build and test against the sandbox with test credentials before you go to production.

Your own portal

Once we work together: your account, team and credentials in one place.

From your first call to your first submission.

Four steps. Working on our Access Point is by agreement with Elyonar.

01
Talk to us
Tell us about your clients, their systems and how you integrate.
02
Build in sandbox
Integrate against test data with sandbox credentials.
03
Get approved for production
Complete KYB. Elyonar reviews your account and issues production credentials.
04
Connect your clients and submit
Each client selects Elyonar as its Access Point and grants you access. Then you submit, track, receive and reconcile their invoices.

What stands behind every invoice.

The same licensed Access Point serves the Yona app and the API.

Licensed twice over: Access Point Provider NITDA/2026/A3HXS0 and System Integrator NITDA/2026/S21ZW0.
Information security: Certified to ISO/IEC 27001:2022, the international standard for information security management, and independently audited. Data is encrypted in transit and at rest.
Data protection: Registered with the Nigeria Data Protection Commission as a data controller (NDPC/DCP/12069), with our NDP Act 2023 compliance audit filed. We collect only the data e-invoicing needs.
Compliant invoices: Every invoice is validated, cryptographically signed, given its invoice reference number and QR code, and transmitted to the NRS.
Account security: TIN verification, two-factor sign-in, signed webhooks and a full audit trail.
Nothing received goes unseen: Invoices delivered to you through the e-invoicing network show up in Yona, with your history once you choose us.

Questions from System Integrators

I am a System Integrator. How do I work with Yona?

Talk to us about your clients and how you integrate. Working on Elyonar's Access Point is by agreement: once we agree, you complete KYB and connect to the Yona Access Point API, and each client selects Elyonar as its Access Point and grants you access. If you only want Yona's invoicing inside your own software, build on the Yona API instead (see /developers).

Do my clients need their own licence?

No. They enable e-invoicing on the taxpayer portal of the NRS, select Elyonar as their Access Point and grant your integration access. The licence is ours; the integration is yours.

Is there a sandbox for System Integrators?

Yes. Sandbox credentials come with your account. The sandbox runs the real flow against the test system of the NRS, with no legal effect.

What does it cost?

Pricing for System Integrators is agreed with you, on your volume and on how you serve your clients. Talk to us and we will set it up with you.

How do I know a notification came from Yona?

Every webhook delivery is signed. Verify the signature, then read the current state through the API before acting on it.

Bring your clients onto a licensed Access Point.

Pricing is agreed with you, on your volume and on how you serve your clients. Talk to us about your clients, their systems and how you integrate.

Talk to us Read the API guide