FIRS ATRS / e-Invoicing API

Nigeria Open Data

Automated Tax Remittance System providing REST API for tax invoice validation and compliance checks. E-invoicing solution enabling businesses to generate, validate, and submit invoices electronically through the FIRSMBS platform with real-time compliance verification.

free

OAuth 2.0 / Bearer Token

No published limit; standard REST API throttling applies

✓ Available

Best For

Tax & Invoicing Applications, ERP Integration, Compliance Solutions

Pricing

Available for registered businesses and taxpayers with valid TINs. REST API over HTTPS with OAuth 2.0 Bearer Token authentication. Mandatory e-invoicing implementation: Wave 1 (Nov 2025) for companies >N5bn; Wave 2 (July 2026) for N1-5bn; Wave 3 (July 2027) for smaller enterprises. Support: support@atrs.firs.gov.ng. Documentation available at https://atrs.firs.gov.ng/docs/

Features Included

Not Supported

Key Highlights

  • Tax invoice validation
  • Compliance checks (TIN, VAT, amounts)
  • Pre-clearance model
  • Real-time invoice approval/rejection
  • OAuth 2.0 security

Required Access Documents

  • Optional
    Must be registered with FIRS
  • Optional
    Active Tax Identification Number required

Use Cases

  • Tax & Invoicing Applications:
  • ERP System Integration:
  • Accounting Software:

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