Send requests in the Claude Messages format.

curl https://api.routerlab.ch/v1/messages \
  -H "Authorization: Bearer $ROUTERLAB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-5",
    "max_tokens": 512,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

const response = await fetch("https://api.routerlab.ch/v1/messages", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.ROUTERLAB_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "claude-sonnet-4-5",
    max_tokens: 512,
    messages: [{ role: "user", content: "Hello" }],
  }),
});

const data = await response.json();

import os
import requests

response = requests.post(
    "https://api.routerlab.ch/v1/messages",
    headers={"Authorization": f"Bearer {os.environ['ROUTERLAB_API_KEY']}"},
    json={
        "model": "claude-sonnet-4-5",
        "max_tokens": 512,
        "messages": [{"role": "user", "content": "Hello"}],
    },
)
response.raise_for_status()
print(response.json())