# Services from pay.quicksilverpro.io on Zero

> pay.quicksilverpro.io serves 3 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/pay.quicksilverpro.io
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/pay.quicksilverpro.io/health.json

## Services

- [QuickSilverPro AI API Credit Top-Up](https://www.zero.xyz/c/quicksilverpro-ai-api-credit-top-up-83f73c82/llms.txt): $1/call via x402. Purchase $1 USD of API credit via x402 payment and receive an OpenAI-compatible API key pre-loaded with that credit for accessing 43 frontier LLMs
- [QuickSilverPro API Credit Top-Up ($10 USDC)](https://www.zero.xyz/c/quicksilverpro-api-credit-top-up-10-usdc-84b99487/llms.txt): $10/call via x402. Purchases $10 USD of API credit via crypto payment and returns an OpenAI-compatible API key and base URL for accessing 43 frontier AI models at up to 20% below list price.
- [QuickSilverPro API Credit Top-Up ($5 USDC)](https://www.zero.xyz/c/quicksilverpro-api-credit-top-up-5-usdc-d17404ba/llms.txt): $5/call via x402. Purchases $5 USD of AI API credit via USDC payment and returns an OpenAI-compatible API key with credit balance for accessing 43 frontier LLM models.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)