Everything you need to integrate
One API platform for invoicing, receipting, POS, inventory, and compliance
Become an SSERIS Integrator
⎔
Invoicing & Receipting
Issue, fiscalize, and verify invoices and receipts in a single API call.
RESTidempotent
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POS Integration
Shifts, multi-tender payments, ESC/POS printer adapters, and receipt templates.
websocketESC/POS
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Tax Compliance
EFRIS signing, FDN generation, anti-fake codes, and QR verification built in.
EFRISPKCS#11
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Stock & Inventory
Real-time stock levels, inter-branch transfers, and full audit trails.
CSVaudit-log
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API Playground
Browse every endpoint, inspect schemas, and fire live requests from Scalar.
openapi-3.1scalar
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Business Lookup
Look up businesses by TIN, query commodity codes, and check VAT status.
lookupHS-codes
Learn more →Get integrated in 3 steps
From application to your first fiscalized invoice
01
$ sseris license apply
Apply for a license
Submit your company details and get approved as a licensed SSERIS integrator. ~2 business days.
02
$ sseris keys provision
Get API credentials
One request per business entity. Receive client_id and client_secret; sandbox keys are instant.
03
$ sseris invoices issue
Start issuing
Every call is automatically fiscalized, signed, stamped with an FDN, and archived.
Ready to integrate?
Start building with SSERIS today — sandbox access is free.