# Services from hcad-api.canvas-cart.workers.dev on Zero

> hcad-api.canvas-cart.workers.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/hcad-api.canvas-cart.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/hcad-api.canvas-cart.workers.dev/health.json

## Services

- [HCAD Parcel Protest & Hearing History](https://www.zero.xyz/c/hcad-parcel-protest-hearing-history-36fc5979/llms.txt): $0.03/call via x402. Returns all ARB (Appraisal Review Board) protests and hearings for a specific Harris County parcel across all tax years, including pre- and post-protest values.
- [HCAD Parcel Value History](https://www.zero.xyz/c/hcad-parcel-value-history-531fd438/llms.txt): $0.02/call via x402. Returns every tax year's assessed, appraised, and market values for a single Harris County (Texas) parcel by HCAD account number.
- [HCAD Neighborhood Protest Outcome Statistics](https://www.zero.xyz/c/hcad-neighborhood-protest-outcome-statistics-f6acf67f/llms.txt): $0.05/call via x402. Returns aggregated ARB protest outcome statistics (hearing count, value reduction rate, median reduction) for a Harris County Appraisal District neighborhood code by tax year.

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)