costkey 0.1.0

Sentry for AI costs. Track every LLM call's cost, tokens, and latency with one line of code.

costkey

Sentry for AI costs. Track every LLM call's cost, tokens, and latency with one line of code.

Install

pip install costkey

Quick Start

import costkey

costkey.init(dsn="https://[e-mail]/your-project")

# That's it. Every AI call is now tracked automatically.
# Works with OpenAI, Anthropic, Google Gemini, Azure OpenAI.

How It Works

CostKey patches httpx and requests — the HTTP clients that every AI SDK uses under the hood. When your code calls any AI provider, CostKey automatically:

1. Detects the AI provider from the URL
2. Extracts token usage from the response
3. Captures a stack trace (which function, which file, which line)
4. Computes cost using built-in pricing for 30+ models
5. Ships the event to your CostKey dashboard (async, non-blocking)

Tracing

with costkey.start_trace(name="POST /api/search"):
    intent = classify_intent(query)
    results = search(query)
    summary = summarize(results)
# All 3 AI calls grouped under one trace

Manual Context

with costkey.with_context(task="summarize", team="search"):
    response = openai.chat.completions.create(...)

Privacy

• Never captures API keys — request headers are never read
• Auto-scrubs credentials from request/response bodies
• before_send hook for custom PII scrubbing

License

MIT