# Services from www.vokko.eu on Zero

> www.vokko.eu serves 4 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/www.vokko.eu
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/www.vokko.eu/health.json

## Services

- [Vokko PayTo Address Check](https://www.zero.xyz/c/vokko-payto-address-check-fc270df6/llms.txt): $0.002/call via x402. Checks whether a specific Ethereum/USDC address belongs to a given domain's x402 payment endpoint, providing ownership evidence.
- [Vokko Pay-Preflight Check](https://www.zero.xyz/c/vokko-pay-preflight-check-a1589f80/llms.txt): $0.001/call via x402. Checks whether an AI agent can complete a payment on a given domain (e.g. allbirds.com), returning payment rails, endpoint details, price, and data freshness.
- [Vokko USDC Transfer Receipt Verifier](https://www.zero.xyz/c/vokko-usdc-transfer-receipt-verifier-ee9eaaa8/llms.txt): $0.001/call via x402. Verifies whether a specific USDC on-chain transaction settled to the expected recipient address and amount
- [Vokko Domain Host Probe](https://www.zero.xyz/c/vokko-domain-host-probe-68326b4f/llms.txt): $0.02/call via x402. Fetches live or cached DNS/host probe data for a given domain, returning connectivity and availability information about that host.

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)