Track Anthropic and Claude API costs by model and token volume, with a daily signal and anomaly alerts for developers.
StackSpend monitors Anthropic (Claude) API costs by model and token volume. It separates Haiku, Sonnet, and Opus spend, ties input/output tokens and cache behaviour to cost, and fires anomaly alerts when model mix or context length shifts — read-only, with your Anthropic API key.
See spend against budget, every day.
The same burn-up view your dashboard shows: cumulative spend against budget, with a forecast tail so you know where the month ends before it does.
Spend vs Budget
Forecast $45,000 this month
Why Anthropic API spend is hard to control
The native Anthropic console reports usage with limited attribution. Separating Claude model spend (Haiku vs Sonnet vs Opus) and tying it to features takes manual work.
Claude API cost is driven by long context and model choice — a workflow moving to Opus or extended context raises the bill fast, with no proactive flag.
Agent loops and retries increase requests per action, and that growth is hard to see at the API level.
What StackSpend shows for Anthropic API
StackSpend connects with your Anthropic API key (read-only) and breaks API spend down by Claude model.
Input tokens, output tokens, cache behaviour, and requests are tied to cost so you can see what drives the Claude API bill.
A daily signal and anomaly detection flag model-mix and context-length changes the day they happen.
Exactly what we track
Setup guideWhat typically causes Anthropic API costs to spike
A workflow moves from Claude Sonnet to Opus without a budget change
Long-context processing repeats across documents without caching
Agent loops and tool calls increase requests per user action
A high-volume path adopts extended context, raising tokens-per-request
Why teams move beyond native Anthropic API billing
Anthropic console usage view is built for investigation. StackSpend is built for prevention.
Anthropic console usage view
- Limited per-model attribution and no daily signal
- No anomaly detection on model mix or context length
- No combined view with OpenAI and other providers
- Retrospective — you see it when you log in
StackSpend
- Claude API cost split by model with token-level detail
- Anomaly detection on model mix and context length
- Daily signal and same-day alerts
- Claude API spend in one view with the rest of your stack
What you get when you connect Anthropic API
Most teams can connect and validate setup in about 5-10 minutes.
Read-only credentials only. StackSpend does not modify provider resources or billing settings.
Daily Slack or email updates, anomaly alerts, and budget tracking in one workflow.
Historical spend context plus pace-to-forecast so overruns are visible before month-end.
Who should use StackSpend for Anthropic API
- Product and engineering teams that need model-level visibility before AI bills surprise them.
- Buyers consolidating OpenAI, Anthropic, Claude, Cursor, or open-model spend into one operating view.
- Teams that need alerts and forecasting, not just retrospective usage dashboards.
Start a trial
Open a StackSpend workspace with no credit card required.
Connect with read-only access
Use the setup guide to connect the provider or workflow with the minimum permissions needed.
Review the first 90 days
Check history, alerts, anomalies, and forecast so you can decide whether the workflow is worth adopting.
Frequently asked
How do I track Anthropic and Claude API costs by model and token volume?
How do I connect the Anthropic API to StackSpend?
Why did my Claude API bill jump?
How do I work out my Claude API cost per feature or customer?
Connect Anthropic API. See your spend today.
Read-only setup in under 5 minutes. 90 days of Anthropic API cost history loaded automatically. Daily signals from day one.