# Services from api.x402ai.dev on Zero

> api.x402ai.dev 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/api.x402ai.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.x402ai.dev/health.json

## Services

- [x402ai Text Embedding API](https://www.zero.xyz/c/x402ai-text-embedding-api-5004873a/llms.txt): $0.01/call via x402. Generates a vector embedding for a given text string, paid per-call via x402 on Base mainnet at $0.01 USDC.
- [x402ai Summarize](https://www.zero.xyz/c/x402ai-summarize-6e81f026/llms.txt): $0.02/call via x402. Summarizes a given block of text into a concise summary, billed at $0.02 USDC per call via x402 on Base mainnet.
- [x402AI Ask Endpoint](https://www.zero.xyz/c/x402ai-ask-endpoint-afa81156/llms.txt): $0.04/call via x402. Answers a natural language question via AI inference, gated by a $0.04 USDC micropayment on Base mainnet using the x402 protocol.

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)