Good to know All examples use the same endpoint. To switch models, change only the "model" value — no other code changes required.

The fastest way to test your key from any terminal.

cURL

curl https://clauden.ai/v1/chat/completions \
  -H "Authorization: Bearer $CLAUDEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Use the official OpenAI SDK — just point base_url at ClaudeN AI.

OpenAI Python SDK

from openai import OpenAI

client = OpenAI(
    api_key="$CLAUDEN_API_KEY",
    base_url="https://clauden.ai/v1",
)

resp = client.chat.completions.create(
    model="gpt-5.4",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)

Prefer the Anthropic SDK? Use the /v1/anthropic base URL.

Anthropic Python SDK

from anthropic import Anthropic

client = Anthropic(
    api_key="$CLAUDEN_API_KEY",
    base_url="https://clauden.ai/v1/anthropic",
)

msg = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello!"}],
)
print(msg.content[0].text)

Replace $CLAUDEN_API_KEY with your own API key (it starts with sk-). It is sent in the Authorization header.

Get your API key Quick Start →

Integration examples