Recipes

Integration guides for popular Python frameworks.

• FastAPI — async endpoint to issue invoices
• Flask — sync issuance in a Flask route
• Django — view + service for issuance and local storage
• Persisting documents — reference DB schema (types & sizes), the write-ahead pattern, and reconciliation

Cross-cutting patterns: - Load the API key from VENDUS_API_KEY or a .env file - Persist every issued document — store id, number, hash and atcud for reprints and future NCs - Pass a unique external_reference per request for idempotency