# Services from x402.netzhandwerker.de on Zero

> x402.netzhandwerker.de serves 11 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/x402.netzhandwerker.de
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402.netzhandwerker.de/health.json

## Services

- [HALOWERK x402werk Receipt & Offer Verifier](https://www.zero.xyz/c/halowerk-x402werk-receipt-offer-verifier-5fbf06c6/llms.txt): $0.003/call via x402. Verifies the cryptographic validity of an x402 payment offer and optional receipt, checking signatures, payer identity, and receipt freshness on Base Mainnet.
- [HALOWERK x402werk — Offer Validate](https://www.zero.xyz/c/halowerk-x402werk-offer-validate-c7838f95/llms.txt): $0.002/call via x402. Validates an x402 payment challenge object (v1 or v2) without executing a payment, either by fetching it from a URL or accepting it directly.
- [HALOWERK x402werk — Replay Guard](https://www.zero.xyz/c/halowerk-x402werk-replay-guard-181e92d3/llms.txt): $0.002/call via x402. Detects duplicate/replayed x402 payment authorizations by fingerprinting nonces, payment IDs, and payload hashes within a configurable time window.
- [HALOWERK x402werk Route Optimizer](https://www.zero.xyz/c/halowerk-x402werk-route-optimizer-6c9a2a43/llms.txt): $0.005/call via x402. Given a buyer's token balances and a seller's accepted payment methods, returns an optimal payment route ranked by cost, speed, or security.
- [HALOWERK x402werk — Blockchain Payment Reconciliation](https://www.zero.xyz/c/halowerk-x402werk-blockchain-payment-reconciliation-5320e5f5/llms.txt): $0.008/call via x402. Reconciles on-chain token transfer receipts against actual blockchain transactions to verify payments were received for a given address and time window.
- [HALOWERK x402werk — Channel Voucher Audit](https://www.zero.xyz/c/halowerk-x402werk-channel-voucher-audit-f7fc977b/llms.txt): $0.006/call via x402. Audits a batch of payment channel vouchers, verifying signatures, claim status, and on-chain state for cryptographic payment channels on Base Mainnet.
- [HALOWERK x402werk — Offer Parse](https://www.zero.xyz/c/halowerk-x402werk-offer-parse-b3069de6/llms.txt): $0.002/call via x402. Fetches and parses an x402 payment challenge (HTTP 402) from a remote URL or a supplied challenge object, returning structured payment requirement details.
- [HALOWERK x402 Payment Policy Checker](https://www.zero.xyz/c/halowerk-x402-payment-policy-checker-b8a1b663/llms.txt): $0.002/call via x402. Validates a proposed x402 micropayment against configurable policy rules (spending limits, allowed assets/chains, recipient filters) before executing it
- [HALOWERK x402werk — Settlement Transaction Verifier](https://www.zero.xyz/c/halowerk-x402werk-settlement-transaction-verifier-243c7831/llms.txt): $0.002/call via x402. Verifies that a blockchain settlement transaction matches expected payment parameters (recipient, token, amount) across multiple EVM chains.
- [HALOWERK x402werk Facilitator Health Check](https://www.zero.xyz/c/halowerk-x402werk-facilitator-health-check-4112303a/llms.txt): $0.003/call via x402. Checks the health and availability of x402 payment facilitators (cdp, xpay, x402org) and optionally verifies chain support via CAIP-2 identifier
- [HALOWERK x402werk Benchmark Price Comparison](https://www.zero.xyz/c/halowerk-x402werk-benchmark-price-comparison-288623b1/llms.txt): $0.006/call via x402. Finds and ranks comparable paid API endpoints by price and description similarity, helping you benchmark your own endpoint's pricing against similar x402 offerings.

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)