Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add aj-geddes/useful-ai-prompts --skill health-check-endpointsgit clone --depth 1 https://github.com/aj-geddes/useful-ai-promptsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/health-check-endpoints)<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/health-check-endpoints"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/health-check-endpoints/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/health-check-endpoints"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/health-check-endpoints.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket warn
- Snyk pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00038 | $0.00564 |
| Opus 5 | $0.00019 | $0.00282 |
| Sonnet 5 | $0.00008 | $0.00113 |
| Haiku 4.5 | $0.00004 | $0.00056 |
Grade A, and why
health-check-endpoints scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Health Check Endpoints
Table of Contents
Overview
Implement health check endpoints to monitor service health, dependencies, and readiness for traffic.
When to Use
- Kubernetes liveness and readiness probes
- Load balancer health checks
- Service discovery and registration
- Monitoring and alerting systems
- Circuit breaker decisions
- Auto-scaling triggers
- Deployment verification
Quick Start
Minimal working example:
import express from "express";
import { Pool } from "pg";
import Redis from "ioredis";
interface HealthStatus {
status: "healthy" | "degraded" | "unhealthy";
timestamp: string;
uptime: number;
checks: Record<string, CheckResult>;
version?: string;
environment?: string;
}
interface CheckResult {
status: "pass" | "fail" | "warn";
time: number;
output?: string;
error?: string;
}
class HealthCheckService {
private startTime = Date.now();
private version = process.env.APP_VERSION || "1.0.0";
private environment = process.env.NODE_ENV || "development";
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| Express.js Health Checks | Express.js Health Checks |
| Spring Boot Actuator-Style (Java) | Spring Boot Actuator-Style (Java) |
| Python Flask Health Checks | Python Flask Health Checks |
Best Practices
✅ DO
- Implement separate liveness and readiness probes
- Keep liveness probes lightweight
- Check critical dependencies in readiness
- Return appropriate HTTP status codes
- Include response time metrics
- Set reasonable timeouts
- Cache health check results briefly
- Include version and environment info
- Monitor health check failures
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 98 lines · 38 tokens per session scan A f5f48eae0505
health-check-endpoints is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (338 stars, last pushed 6mo ago), licensed MIT. It adds 38 tokens to every session and 564 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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