fast-ops-url-probe-cli

CLI for fast URL reachability checks and first-response triage for 5xx and network failures.

Install

npm i -g fast-ops-url-probe-cli

Or run without install:

npx --yes fast-ops-url-probe-cli https://example.com

What It Gives You

• DNS resolution details (hostname and resolved addresses)
• HTTP status, redirect chain, headers, latency
• Failure classification (for example bad_gateway, gateway_timeout, dns_resolution_failure)
• Optional side-by-side compare mode for origin vs proxy or internal vs external paths
• Next-step checks you can run immediately
• Optional status assertion mode for quick pass/fail automation

Usage

fast-url-probe <url> [--compare <url>] [--json] [--timeout <ms>] [--max-redirects <n>] [--method <verb>] [--header <key:value>] [--expect-status <code>] [--insecure]

Quick Examples

Basic probe:

fast-url-probe https://example.com/health

JSON output for scripts:

fast-url-probe https://example.com/health --json

Check proxy vs origin behavior:

fast-url-probe "http://origin.local/health" --compare "https://proxy.example.com/health" --expect-status 200 --json

Probe with method and header override:

fast-url-probe "https://proxy.example.com/api/stacks/demo/up?env=1" --method POST --header "Accept: application/json" --timeout 45000 --json

Exit Codes

• 0: Probe completed and assertions (if any) passed
• 1: Argument or execution error
• 2: --expect-status assertion failed

Node Version

Node.js 20 or later.