Quickstart

1. Sign up

Go to codecosts.com and click Get Started Free. Sign in with email, Google, or GitHub — no credit card required.

2. Create a proxy endpoint

In the dashboard, go to Settings and create a proxy endpoint. Give it a name like “my-project” or “production”.

You’ll get a URL like https://codecosts.com/proxy/my-project.

3. Point your Claude client at it

Set the ANTHROPIC_BASE_URL environment variable to your proxy endpoint URL. Any Claude client that respects this variable will route through Codecosts automatically.

Claude Code

export ANTHROPIC_BASE_URL=https://codecosts.com/proxy/my-project
claude "What is 2 + 2?"

Python SDK

export ANTHROPIC_BASE_URL=https://codecosts.com/proxy/my-project
python my_script.py

No code changes needed — the Anthropic Python SDK reads ANTHROPIC_BASE_URL automatically.

curl

curl https://codecosts.com/proxy/my-project/v1/messages \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model":"claude-haiku-4-5-20251001","max_tokens":100,"messages":[{"role":"user","content":"Hello"}]}'

That’s it. Your existing API key and auth flow work unchanged — Codecosts forwards everything to Anthropic transparently.

Tip

If the proxy returns a 404, double-check that the slug in your URL matches the endpoint you created in Settings.

4. View your traces

Every API call appears in the Traces tab within seconds. Click any trace to see the full detail:

• Token breakdown — input, output, cache creation, cache read, and calculated cost
• Full request — model, system prompt, tools, messages
• Full response — parsed assistant output, or raw SSE for streaming calls

What’s next?

• Traces Guide — filtering, searching, and understanding your usage
• API Reference — explore the usage and management endpoints
• SDK Guide — query usage data programmatically
• CLI — check usage from the terminal