I built a tiny $10 prepaid API for Qwen2.5-14B (OpenAI-compatible)

Описание и применение

Пробный сервис, позволяющий пользователям покупать $10 пакет доступа к модели Qwen2.5‑14B через OpenAI‑совместимый API, с простым расчётом токенов и оплатой через Polar.

Задача

Providing affordable, prepaid inference access to a large language model without GPU rental or cloud console reselling.

Результат

The POC demonstrates a low‑cost, prepaid inference service, enabling quick monetization of the Qwen model without complex infrastructure.

Рабочий процесс

• 1. User visits landing page and selects $10 pack.
• 2. User completes checkout via Polar payment gateway.
• 3. System issues a unique API key tied to the prepaid balance.
• 4. User sends POST /v1/chat/completions requests to the gateway.
• 5. Gateway authenticates key, tracks input/output tokens, and deducts cost ($0.70/M input, $1.40/M output).
• 6. When balance reaches zero, API key is disabled until next purchase.

Доказательства

OpenAI-compatible POST /v1/chat/completions

Источник

$10 pack (~$9 usable after Polar fee)

Источник