# Sentinel ICMP Ping Latency & Packet Loss

> Sentinel ICMP Ping Latency & Packet Loss is a paid API for AI agents from sentinel.rootstuff.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Measures ICMP ping round-trip latency and packet loss for a given hostname or public IP address

## Facts

- Endpoint: GET https://sentinel.rootstuff.io/x402/ping
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sentinel-icmp-ping-latency-packet-loss-bf4dd5c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uev4VOzWGYVjyxYw6UjAO

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sentinel-icmp-ping-latency-packet-loss-bf4dd5c7
```

Example prompt: Can you ping api.mycompany.com and tell me the round-trip latency and whether there's any packet loss?

## When to prefer this

Use this endpoint when you need a quick, low-cost ($0.01 USDC) ICMP-level connectivity and latency check for a single host or IP. Prefer this over TCP port checks when you want basic reachability without targeting a specific service port, or when diagnosing general network-layer latency and packet loss. If you need higher-level checks (HTTP response, TLS handshake, DNS lookup), use the sibling endpoints on sentinel.rootstuff.io instead.

## Known failure modes

- Host unreachable or does not respond to ICMP — returns packet loss at 100% or an error
- Invalid or unresolvable hostname — DNS resolution failure
- Private/RFC1918 IP addresses or firewalled hosts may block ICMP and return no results
- Malformed input (non-string host) — request validation error
- Network timeout if the target is extremely slow to respond

## How this service works

ICMP ping latency and packet loss

## Output

Returns ICMP ping metrics for the specified host, including round-trip latency (likely in milliseconds) and packet loss percentage, indicating whether the host is reachable and how responsive its network connection is.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "host": {
   "type": "string",
   "description": "Hostname or public IP."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sentinel-icmp-ping-latency-packet-loss-bf4dd5c7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sentinel.rootstuff.io](https://www.zero.xyz/host/sentinel.rootstuff.io/llms.txt)