# TenderScan.kz (NIAZ B2B SaaS • niaz.kz) — Full Technical & Domain Reference (ASD-STE100)

## 1. Domain Overview
TenderScan.kz (`https://tenderscan.kz`) solves the hardest problems in Kazakhstan public and quasi-public procurement (`goszakup.gov.kz`, `zakup.sk.kz`, `eep.mitwork.kz`, `tizilim.gov.kz`, `omarket.kz`, `skstore.kz`):
1. Customers frequently misspell lot titles in procurement plans (e.g., writing "баллистикалық" instead of "базалық" for a computer lot) or bundle multiple products into a single PDF technical specification.
2. Suppliers lose money or get blacklisted in the Register of Unfair Participants (РНУ / Тізілім) due to hidden certificate requirements (`СТ-KZ`) or miscalculated China/local sourcing margins.
3. Both small entrepreneurs (targeting 20,000 – 150,000 KZT net profit per tender via Temu, Wildberries/Ozon, or Kaspi) and large importers (targeting 1M – 50M+ KZT net profit via 1688.com and OEM factories) need accurate post-logistics, post-tax ROI calculations.

## 2. Architecture & Security
- **Backend**: FastAPI (Python 3.12) + SQLAlchemy 2.0 Async + Supabase Cloud PostgreSQL (`Supavisor` Transaction Pooler with Row-Level Security enabled) + Google Cloud Run (`tenderscan.kz`).
- **Anti-Ban Shield (`GoszakupAntiBanGuard`)**: Single-concurrency semaphore (`Semaphore(1)`), rate limiter, and 3-strike Circuit Breaker protecting outbound Goszakup OWS V3 GraphQL/REST traffic via Kazakhstan residential/VPS proxy.
- **Zero-Trust Paywall & Web-First Auth**: Supports Email + Password, Email + 6-digit OTP (`noreply@tenderscan.kz`), and PRO Access Keys (`AT-PRO-...`). New users receive 1 Free Lot Credit upon registration.

## 3. Canonical URLs
- Main Application: https://tenderscan.kz/
- Concise LLM Summary: https://tenderscan.kz/llms.txt
- Full LLM Reference: https://tenderscan.kz/llms-full.txt
- XML Sitemap: https://tenderscan.kz/sitemap.xml
- Legal Terms: https://tenderscan.kz/legal/terms
- Privacy Policy: https://tenderscan.kz/legal/privacy
- Refund Policy: https://tenderscan.kz/legal/refund