AI agent diagnostics

Your agents are burning money.
We know why.

For AI builders and production teams. Route your AI traffic through Costile once and automatically surface cost overruns, ownership, and recommended fixes as they happen.

See the Diagnosis
Explore a real AI spend incident from detection → resolution. It’s read-only, nothing to configure or connect.
Metadata-first by default DPA available EU company EU AI Act evidence
costile.com/dashboard
Live incident
Spend timeline
$585.68
3 spend spikes over limit
Daily budget limit 02:20 02:41 02:59
Spend
Your agents spent $585.68 in the last 24h, on pace for $18k/mo.
Cap
The dashed line shows the daily budget your agents should stay under.
Breach
Spend crossed the limit 3 times. Open the Support team marker and see Maya owns the workflow.
Traceable record captured audit log #1842

Provider dashboards tell you what. Costile tells you why.

Ownership

AI usage is linked to a specific key, owner, and workflow so you always know who generated the cost.

Detection & Diagnosis

Cost spikes are flagged with what happened, why it happened, and which requests were affected.

Fix & Evidence

You get recommended fixes, estimated cost savings, and a full audit log for compliance and governance.

AI Spend Investigation

See the spike. Stop the cost.

At 2:47 AM, an AI agent goes into a runaway loop. Costile catches it, shows who's responsible, projects the cost, and provides the fix that stops it.

app.costile.com / diagnostics / support-bot
High Impact · Active
Support-bot context loop incident
Repeated calls caused by context accumulation. The full conversation history is resent every request without context limits.
Impact Cost
$97.84
Monthly Risk
$2,935
Incident Window
02:47 → 02:52
Affected Requests
9
Session Loop
9 requests in the same session, with tokens escalating from 920 to 1,480. Max token hits occurred on 3 of 9 calls.
Loop cost
$97.84
Requests in loop
9
Max tokens hits
3 / 9
→ Agent re-reads its own outputs without a completion limit.
Issue
  • Repeated calls caused by a context accumulation loop.
  • Full conversation history resent without context limits.
Root Cause
  • Agent re-reads its own outputs.
  • No completion limit, so context keeps growing.
Recommended Fix
  • Add a max_turns guard.
  • Set max_turns: 6.
  • Reset context after tool completion.
Expected outcome Stops loop
Session cost ~85% lower
Monthly reduction ~$2,495
Owner Maya Holm · AI Operations Director · Northstar production AI workflows
EU AI Act · Regulation 2024/1689 (Phased application from 2 August 2026)

Built for the EU AI Act

Article 9 — Risk Management

Requirement: Documented risk management process for high-risk AI systems.

What regulators expect: Ongoing identification, mitigation, and tracking of AI-related risks.

Costile provides:
  • Live anomaly detection across agents and workflows
  • Root-cause capture when incidents occur (what happened + why)
  • Suggested fixes to resolve and prevent recurrence

Article 12 — Record-Keeping

Requirement: Automatic, traceable logs of system behavior in production.

What regulators expect: Who did what, when, and under what conditions.

Costile provides:
  • Automatic audit logs for every AI call
  • Full attribution by API key, agent, and team
  • Production traceability accessible to workspace admins

Costile gives you both Article 9 + Article 12 coverage out of the box.

Learn more: Costile EU AI Act compliance page

Pricing and setup

What your subscription funds
  • Improve AI diagnostics and cost detection
  • Build better governance and compliance features
  • Create smarter cost-saving recommendations
How it works

From trial to live traffic in three steps

Starting a Costile trial and choosing the Individual plan
1

Pick Individual or Team based on how many people need access, sign in with email and new password to create a workspace, and start the 10-day free trial without a card.

Connecting Costile and preparing checkout after the trial
2

Send AI calls through Costile, review incidents and spend, and only proceed to billing once the pilot proves the value.

Managing plan settings after the trial
3

Add payment details in Billing after the trial, manage your plan in Settings, and switch or cancel it at any time as team needs evolve.

Individual

For solo builders and operators monitoring AI usage.

$79 /month
  • Live incident diagnostics (owner, cause, fix)
  • Spend visibility across agents and workflows
  • Abnormal spend alerts via email
Start Individual Trial

Team

For teams needing governance and shared visibility.

$299 /month
  • Everything in Individual, plus:
  • Team-wide attribution (person, API key, workflow)
  • Audit-ready logs for compliance & procurement
  • Fast alerts via Slack or webhooks
Start Team Trial

Good To Know

How does it work?
Route API traffic through Costile's proxy → it analyzes requests in real time → returns cause + impact + fix reports.
Does routing through Costile add latency?
The proxy is lightweight. It forwards requests and records cost metadata without modifying model calls, so overhead stays low. We'll measure exact latency during pilots.
Do you store my prompts or responses?
Default: No. Only operational metadata is stored. Optional prompt capture can be enabled for debugging.
Can we inspect or run Costile ourselves?
Yes. The core runs locally and is fully inspectable. Cloud adds alerts, attribution, and managed ops.
How is Costile different from Helicone or LangSmith?
Those tools show logs. Costile focuses on why something happened, who caused it, and how to fix it.

Catch AI Cost Spikes Before You're Billed

See the Diagnosis or Talk to Costile