# Services from livecheck.fly.dev on Zero

> livecheck.fly.dev serves 6 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/livecheck.fly.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/livecheck.fly.dev/health.json

## Services

- [Livecheck Sentinel One-Shot Check](https://www.zero.xyz/c/livecheck-sentinel-one-shot-check-d5748e8a/llms.txt): $0.02/call via x402. Performs a single on-demand URL condition check using a configurable detector (status_change, keyword, text_diff, or numeric_threshold) and returns the current observation plus whether the condition fired.
- [Livecheck Sentinel Watch — 30-Day URL Condition Monitor](https://www.zero.xyz/c/livecheck-sentinel-watch-30-day-url-condition-monitor-be489337/llms.txt): $2.5/call via x402. Sets up a persistent 30-day URL watcher that checks a target URL on a configurable interval and delivers HMAC-signed callbacks whenever a specified condition (status change, keyword, text diff, or numeric threshold) is detected.
- [Livecheck Confirm](https://www.zero.xyz/c/livecheck-confirm-9cb0f3ed/llms.txt): $0.1/call via x402. Independently verifies that a lead/contact form submission succeeded by fetching the thank-you or result page and returning a confirmed/failed/unknown verdict with evidence
- [Livecheck URL Status Verifier](https://www.zero.xyz/c/livecheck-url-status-verifier-28803304/llms.txt): $0.01/call via x402. Fetches a job or product page URL and returns whether it is live, closed, or unknown, along with the page title and detection signals like apply forms, sold-out indicators, and 404s.
- [Livecheck Order Confirmation Verifier](https://www.zero.xyz/c/livecheck-order-confirmation-verifier-acc7538f/llms.txt): $0.25/call via x402. Independently verifies that an e-commerce order was successfully placed by inspecting a post-checkout URL for durable order/reference/ticket IDs.
- [Livecheck Watcher Chain Top-Up](https://www.zero.xyz/c/livecheck-watcher-chain-top-up-e0a5cf7c/llms.txt): $0.5/call via x402. Adds USDC credit to an existing Livecheck watcher's chain budget so it can continue running scheduled verification checks.

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)