# Services from longwatch.dev on Zero

> longwatch.dev serves 5 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/longwatch.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/longwatch.dev/health.json

## Services

- [Longwatch Watch Alerts Poll](https://www.zero.xyz/c/longwatch-watch-alerts-poll-39873541/llms.txt): $0.005/call via x402. Poll a standing watch for new alerts (SEC filings, page changes, RSS items, crypto prices) since a given cursor position
- [Longwatch One-Shot Check](https://www.zero.xyz/c/longwatch-one-shot-check-528f5045/llms.txt): $0.001/call via x402. Performs a single, immediate lookup of a URL, RSS feed, crypto price, or SEC filing without creating a persistent watch.
- [Longwatch Watch Registration](https://www.zero.xyz/c/longwatch-watch-registration-8dd7df50/llms.txt): $0.005/call via x402. Registers a standing watch on a web page, RSS feed, crypto price, or SEC filing and returns a poll URL for structured alerts
- [LongWatch Add Credits to Watch](https://www.zero.xyz/c/longwatch-add-credits-to-watch-c44e8a85/llms.txt): $0.05/call via x402. Top up the delivery credit balance for an existing LongWatch monitoring watch, enabling continued alert polling.
- [longwatch Alert Polling](https://www.zero.xyz/c/longwatch-alert-polling-2d1aced6/llms.txt): $0.005/call via x402. Poll a longwatch watch for new alerts since a given cursor sequence number, keeping the watch alive

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)