Know your Worker broke, why it broke, and what it cost you — before your users tell you. Capture console.error and crashes automatically.
// Works with Cloudflare Workers, Next.js, Vercel, Hono & more — one SDK, one dashboard
$ npm install @flarelog/sdk// Free up to 10k logs/mo // No card required
Cloudflare's cost metrics lag 15–60 minutes. A misconfigured loop can rack up KV writes, R2 Class A operations, or D1 row reads long before the bill appears. FlareLog measures CPU, subrequests, and duration in real time on every execution.
Immediately calculates costs from incoming Tail Worker CPU & subrequest metrics.
Dispatches webhooks to Slack or Discord when cost speeds past defined budgets.
Filter by Worker name, route, HTTP status, or deployment tag to narrow down leaks.
Cloudflare's native observability got better in 2025. It still can't tell you when your Worker died silently, when a KV loop is burning money, or why a 500 happened with zero logs. FlareLog can.
When a Worker times out, exceeds CPU, or crashes before logging, your SDK never fires. The Tail Worker still captures the failure because it runs after the producer code.
No manual boilerplate needed. The FlareLog SDK intercepts console.error and unhandled exceptions automatically, capturing accurate execution context.
Cloudflare keeps logs for 7 days. If a customer reports an edge incident from last week, you're out of luck. FlareLog keeps up to 90 days on Pro tiers to keep incidents searchable.
Combine runtime code errors from our SDK layer with underlying compute metrics from Cloudflare's Tail Consumer. No gaps, no blindspots.
Embedded inside your standard worker script. Dispatches captured exception payloads and developer info log commands.
console.error / logger.info()Listens out-of-band at the edge interface. Measures the final compute cost, wall CPU, memory limits, and handles silent timeouts.
CPU + class_a_ops + class_b_opsCorrelate business log entries with their exact underlying tail statistics inside an integrated debugging pane.
Database connection delay: 450ms
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Install the lightweight SDK package or map our tail listener worker script globally.
Drop in our lightweight SDK & edge listener scripts in minutes. Stop guessing and capture silent uncaught failures before they spike your invoice.