One drop-in client.
Every Cartie header — automatic.

curl -O https://cartieai.com/api/sdk/cartie.py
pip install openai
# That's it. import cartie in your code.

import cartie
cartie.set_proxy(key="ck_live_...")
cartie.set_tenant("marketing")

client = cartie.openai()                 # drop-in for openai.OpenAI()
client.chat.completions.create(
    model="gpt-5.2",
    messages=[{"role": "user", "content": "Draft a blog headline"}],
)

# Egress gate (refuse cross-cloud bleed):
with cartie.egress(source="gcp", dest="aws", data_gb=1024,
                   token_pct=0.05, enforce=True):
    # If verdict is rose, proxy returns 412 BEFORE the upstream call.
    client.chat.completions.create(model="gemini-3-flash", ...)

curl -O https://cartieai.com/api/sdk/cartie.ts
npm install openai
# That's it. import * as cartie from './cartie' in your code.

import * as cartie from './cartie';
cartie.setProxy({ key: process.env.CARTIE_KEY! });
cartie.setTenant('marketing');

const client = cartie.openai({ apiKey: process.env.OPENAI_KEY! });
await client.chat.completions.create({
  model: 'gpt-5.2',
  messages: [{ role: 'user', content: 'Hello' }],
});

// Egress gate inside an async scope:
await cartie.withEgress(
  { source: 'gcp', dest: 'aws', dataGB: 1024, tokenPct: 0.05, enforce: true },
  () => client.chat.completions.create({ model: 'gemini-3-flash', ... }),
);