Receipt Extraction
AU GST/ABN-aware receipt & invoice extraction — applies documented AU entertainment/ITC tax-code rules per line item, returning a `tax_code`, a `confidence` and a `rationale` for each, not just OCR. Vendor, line items, totals, and tax fields as structured, validated JSON. **How it works:** caller-supplied documents in, versioned JSON out. Declared output schema (`structuredContent`), per-document error isolation, honest confidence signals. **Free tier:** 20 documents/month,