burnlock · live demo

See exactly what your LLM calls cost.
Before they wreck you.

Click a real scenario. Get an instant verdict. No signup, no install, no API key.

verdict

Startup burning $800/month

HARD STOP
aggregate cost
$38.50
per call
$0.193
total input
9,000,000
total output
1,600,000
why
  • ▸input tokens drove $22.50 of $38.50
  • ▸200 calls × $0.193 per call
  • ▸aggregate spend over $2.00 — hard stop, no override
sdk · v0.2.0 · openai + anthropic

Get your free API key.

500 calls/month free. No credit card. Two-line install. Verdicts print to your terminal after every OpenAI or Anthropic call.

Free to use. 500 calls/month. No credit card. No telemetry beyond the call counter.

sdk on github