# Services from hash.openverbs.com on Zero

> hash.openverbs.com serves 2 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/hash.openverbs.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/hash.openverbs.com/health.json

## Services

- [HMAC Signature Computation](https://www.zero.xyz/c/hmac-signature-computation-2b82d2db/llms.txt): $0.002/call via x402. Computes a keyed HMAC (Hash-based Message Authentication Code) over arbitrary data using a shared secret key, supporting SHA-2, SHA-3, BLAKE2, and legacy digest algorithms.
- [hash.openverbs.com Cryptographic Hash](https://www.zero.xyz/c/hash-openverbs-com-cryptographic-hash-1e36f6a8/llms.txt): $0.002/call via x402. Compute a cryptographic digest of arbitrary data using SHA-2, SHA-3, BLAKE2, or legacy algorithms (SHA-1, MD5, RIPEMD-160), with flexible input/output encodings.

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)