# Services from api.curb.numetal.xyz on Zero

> api.curb.numetal.xyz serves 5 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.curb.numetal.xyz
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.curb.numetal.xyz/health.json

## Services

- [CURB Agent-to-Agent Inference Swap Payment](https://www.zero.xyz/c/curb-agent-to-agent-inference-swap-payment-dbbb0797/llms.txt): $0.1/call via x402. Settles a peer-to-peer inference swap match by processing USDC payment via x402 protocol on Base or Solana
- [CURB Agent-to-Agent Inference Swap Clearinghouse](https://www.zero.xyz/c/curb-agent-to-agent-inference-swap-clearinghouse-fd3c4e0f/llms.txt): $0.1/call via x402. Clears peer-to-peer inference swap transactions between agents, accepting USDC payment via x402 on Base and Solana without requiring upstream API keys on the hub.
- [CURB Discovery Probe (x402 USDC on Base)](https://www.zero.xyz/c/curb-discovery-probe-x402-usdc-on-base-f83cfec1/llms.txt): $0.1/call via x402. A paid discovery probe endpoint that validates x402 micropayment flows on Base using USDC, returning a match result for a specific CURB match ID.
- [CURB Discovery Probe (x402 USDC on Base)](https://www.zero.xyz/c/curb-discovery-probe-x402-usdc-on-base-715a8d05/llms.txt): $0.1/call via x402. A paid discovery probe endpoint that accepts a small USDC payment via x402 protocol on Base and returns a sample response, used to verify the service is live and payment-gated correctly.
- [CURB Discovery Probe (x402 USDC on Base)](https://www.zero.xyz/c/curb-discovery-probe-x402-usdc-on-base-0ba5112b/llms.txt): $0.1/call via x402. A paid discovery probe endpoint that validates x402 USDC micropayment flow on Base, returning a confirmation response upon successful payment

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)