# Services from sin.x420.dev on Zero

> sin.x420.dev serves 2 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/sin.x420.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/sin.x420.dev/health.json

## Services

- [SINTIA (SIN) Token Purchase - 1 USDC via x420.dev](https://www.zero.xyz/c/sintia-sin-token-purchase-1-usdc-via-x420-dev-4962416f/llms.txt): $1/call via x402. Purchases 1 USDC worth of SIN (SINTIA) tokens on-chain and returns transaction details including tokens received and transaction hashes
- [SINTIA (SIN) Token Purchase - $5 USDC via x420.dev](https://www.zero.xyz/c/sintia-sin-token-purchase-5-usdc-via-x420-dev-c7e57062/llms.txt): $5/call via x402. Executes a $5 USDC purchase of SIN (SINTIA) tokens on-chain, returning swap and transaction details

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)