# Services from penny-paid-batch-production.up.railway.app on Zero

> penny-paid-batch-production.up.railway.app serves 8 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/penny-paid-batch-production.up.railway.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/penny-paid-batch-production.up.railway.app/health.json

## Services

- [Penny Engine — AI Agent Outcome Guard](https://www.zero.xyz/c/penny-engine-ai-agent-outcome-guard-ffac1b70/llms.txt): $0.001/call via x402. Validates AI agent output against declared expectations, returning a deterministic PASS/FAIL verdict and SHA-256 fingerprint of the result.
- [Penny Engine — AI Agent Outcome Guard](https://www.zero.xyz/c/penny-engine-ai-agent-outcome-guard-44dd6514/llms.txt): $0.001/call via x402. Validates AI agent outputs and CSV catalog data against defined expectations, returning a deterministic PASS/FAIL verdict with a SHA-256 fingerprint for audit.
- [Penny Engine — Base Network Gas & Block Info](https://www.zero.xyz/c/penny-engine-base-network-gas-block-info-cded2920/llms.txt): $0.001/call via x402. Returns current Base network (EIP-155:8453) block number, gas price in Wei and Gwei, and nominal ETH transfer fee via a paid x402 call.
- [Penny Engine — Base Wallet Balance Checker](https://www.zero.xyz/c/penny-engine-base-wallet-balance-checker-63bbddff/llms.txt): $0.001/call via x402. Returns the ETH and USDC balances, address, network, and block number for a Base-chain wallet, paid via x402 micropayment.
- [Penny Engine — AI Agent Outcome Guard (Route Plan)](https://www.zero.xyz/c/penny-engine-ai-agent-outcome-guard-route-plan-9a0aa5a9/llms.txt): $0.001/call via x402. Validates an AI agent task description and returns a deterministic PASS/FAIL result with a SHA-256 fingerprint via x402 micropayment on Base.
- [Penny Engine — Price Batch Profitability Analyzer](https://www.zero.xyz/c/penny-engine-price-batch-profitability-analyzer-e38818bd/llms.txt): $0.001/call via x402. Evaluates up to 50 pricing scenarios and returns profit estimates, identifying the highest-profit plan given price, cost, fees, ads, and shipping inputs.
- [Penny Engine — AI Agent Outcome Guard (Ping)](https://www.zero.xyz/c/penny-engine-ai-agent-outcome-guard-ping-ff691f22/llms.txt): $0.001/call via x402. Returns a deterministic service health ping with timestamp, network identity, and settlement-protection status via x402 payment on Base.
- [Penny Engine — Market Demand Intelligence](https://www.zero.xyz/c/penny-engine-market-demand-intelligence-0f9f1d64/llms.txt): $0.001/call via x402. Returns a 7-day M2M transaction intelligence report on market demand candidates, validated via x402 micropayment on Base.

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)