How to Monitor Hono Framework APIs with Vigilmon

Hono is a fast, lightweight web framework built for edge runtimes - Cloudflare Workers, Deno Deploy, Bun, and Node.js. Its ultra-small bundle and fast cold starts have made it popular for API backends and middleware. But edge-deployed APIs have unique monitoring challenges: no persistent server to SSH into, and failures often look different from traditional server crashes.

Here's how to set up external uptime monitoring for Hono APIs with Vigilmon.

Adding a Health Route to Hono

Hono makes it trivial to add a health endpoint:

` ypescript
import { Hono } from 'hono'

const app = new Hono()

// Health check route
app.get('/health', (c) => {
return c.json({ status: 'ok', timestamp: new Date().toISOString() })
})

// Your other routes
app.get('/api/users', async (c) => {
// ...
})

export default app
`

For a more thorough health check that verifies external dependencies:

` ypescript
app.get('/health', async (c) => {
const checks: Record = {}

// Check D1 database (Cloudflare Workers)
if (c.env?.DB) {
try {
await c.env.DB.prepare('SELECT 1').run()
checks.database = true
} catch {
checks.database = false
}
}

// Check KV store
if (c.env?.KV) {
try {
await c.env.KV.put('health_check', 'ok', { expirationTtl: 60 })
checks.kv = true
} catch {
checks.kv = false
}
}

const allHealthy = Object.values(checks).every(v => v !== false)

return c.json(
{ status: allHealthy ? 'ok' : 'degraded', checks },
allHealthy ? 200 : 503
)
})
`

Deploying and Verifying

After deploying your Hono app, verify the health endpoint responds:

`ash

Cloudflare Workers

curl https://your-worker.your-subdomain.workers.dev/health

Custom domain

curl https://api.yourdomain.com/health

Bun/Node local

curl http://localhost:3000/health
`

Expected response:
json
{"status":"ok","timestamp":"2026-08-03T..."}


Setting Up Vigilmon

1. Create a free account at vigilmon.online
2. Click Add Monitor
3. Type: HTTP(S)
4. URL: https://your-hono-api.com/health
5. Method: GET
6. Keyword check: "status":"ok" - this verifies the health check passes, not just that Cloudflare returns 200
7. Check interval: 1 minute for production
8. Alerts: Email, Slack, or webhook

Vigilmon checks from multiple geographic regions, which matters for edge deployments - a failure in one Cloudflare region might not affect others.

Hono on Cloudflare Workers: Specific Considerations

Cold starts: Workers have minimal cold start overhead, but first-request timing can vary. Vigilmon's 1-minute check interval catches any sustained cold start issues.

Worker limits: If your Worker hits CPU time limits (50ms on free, 30s on paid) or memory limits, it throws an error. The health endpoint catches this if the limit is hit during the health check itself.

Wrangler environment variables: Don't hardcode secrets in your health check. Use c.env.MY_SECRET to access Wrangler-managed secrets.

Hono on Bun or Node.js

For Bun or Node.js deployments, the health endpoint works identically. The key difference is you have a persistent process to monitor:

` ypescript
// Bun server
const server = Bun.serve({
port: 3000,
fetch: app.fetch,
})

console.log(Listening on port )
`

Point Vigilmon at your public domain - the health check verifies the Bun process is alive and accepting requests.

Monitoring Multiple Hono Routes

For production APIs with critical route groups, add separate monitors:

` ypescript
// Auth health
app.get('/health/auth', async (c) => {
// Verify auth service / JWT secret is present
if (!c.env.JWT_SECRET) {
return c.json({ status: 'error', service: 'auth' }, 503)
}
return c.json({ status: 'ok', service: 'auth' })
})

// Payment health
app.get('/health/payments', async (c) => {
// Light check that Stripe is reachable
const res = await fetch('https://api.stripe.com/v1', {
headers: { Authorization: Bearer }
})
return c.json({
status: res.ok ? 'ok' : 'degraded',
service: 'payments'
})
})
`

Then add separate Vigilmon monitors for each critical service component.

Hono Middleware Health Metrics

If you're using Hono middleware for request logging, you can emit timing data alongside health checks. This doesn't replace Vigilmon monitoring but complements it with internal metrics:

` ypescript
import { logger } from 'hono/logger'
import { timing } from 'hono/timing'

app.use('', logger())
app.use('', timing())
`

SSL Certificate Monitoring

Add a dedicated SSL monitor for your Hono API domain:

• Type: SSL Certificate
• Domain: your-hono-api.com
• Alert: 14 days before expiry

Summary

Hono's edge-first architecture makes it fast by default. External monitoring from Vigilmon gives you the visibility to know when "fast" becomes "down" - whether from a Worker error, a bad deployment, or a dependency failure.

Get started free at vigilmon.online - setup takes under 5 minutes.