DEVOPS

Escalate sudden Vercel spend spikes to on-call via PagerDuty

Runs hourly to detect when Vercel build or bandwidth spend jumps sharply above its recent baseline.

CategoryDevOps
Enginesim
Difficultyadvanced
Triggerschedule
Steps6
Setup~25 min

How it runs

The automated pipeline, trigger to output.

  • TriggerHourly scheduled spend check
  • ActionPull current-hour build and bandwidth spendVercelVercel
  • ActionRead trailing baseline samplesAxiom
  • LogicDoes spend deviation clear the spike threshold?
  • ActionOpen PagerDuty incident for on-callPagerDutyPagerDuty
  • OutputRecord spike sample to baseline storeAxiom

What it does

Catches Vercel cost spikes the moment they start instead of at month end. Every hour it compares the latest spend rate against a recent baseline, and a sharp deviation opens a PagerDuty incident routed to the on-call engineer.

When to use it

Use it for the failure modes that move fast: a hot-looping deploy bot, a viral page hammering bandwidth, or an image-optimization misconfiguration. These can spend a meaningful chunk of budget in hours, faster than a daily digest would surface.

How it works

  1. 1An hourly scheduled trigger starts the check.
  2. 2The flow pulls the current hour's build and bandwidth spend from the Vercel usage API.
  3. 3It reads the trailing baseline from Axiom and computes the deviation from normal.
  4. 4A logic step decides whether the spike clears the alert threshold; if not, it records the sample and exits quietly.
  5. 5On a confirmed spike it opens a PagerDuty incident tagged with the top contributing projects and the spend delta.
  6. 6It writes the spike sample back to Axiom so the baseline stays current.

Set it up

What you configure once, before turning it on.

  1. 1
    Connect VercelDeploys, runtime logs, analytics.
  2. 2
    Connect AxiomLog streams, queries, dashboards.
  3. 3
    Connect PagerDutyIncidents, on-call, escalations.
  4. 4
    Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
  5. 5
    Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
  6. 6
    Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.

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