Prerequisites

Account and credentials

• ERPly Pro sandbox account (US-EP-12 will deliver self-service; in the meantime request one via /docs/support).
• API_KEY and tenantId — issued when the tenant is created.
• Certificate — sandbox shares a test INDOTEL certificate; in production you must upload your own.

Software

• curl ≥ 7.50 or any HTTP client.
• (Optional) Python 3.11+ with requests or Node 20+ with global fetch.
• uuidgen or equivalent to generate Idempotency-Key.

Background

It helps to read:

• Concept: e-CF lifecycle
• Concept: XAdES-BES signing
• Concept: async flow and webhooks

If you have everything above, continue to step 2.