Claude Messages

The Anthropic native Messages protocol. If your code uses the official anthropic SDK, just point base_url at the gateway. You can also call Claude models through the OpenAI-compatible Chat Completions endpoint.

Request Example

from anthropic import Anthropic

client = Anthropic(
    base_url="https://apicdn.xyc.ai",
    api_key="sk-xxxxxxxx",
)

msg = client.messages.create(
    model="claude-opus-4-8",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Introduce yourself in one sentence."}],
)
print(msg.content[0].text)

curl https://apicdn.xyc.ai/v1/messages \
  -H "x-api-key: sk-xxxxxxxx" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-opus-4-8",
    "max_tokens": 1024,
    "messages": [
      {"role": "user", "content": "Introduce yourself in one sentence."}
    ]
  }'

Main Parameters

Response Structure

{
  "id": "msg_xxxxxxxx",
  "type": "message",
  "role": "assistant",
  "model": "claude-opus-4-8",
  "content": [{"type": "text", "text": "..."}],
  "stop_reason": "end_turn",
  "usage": {"input_tokens": 12, "output_tokens": 30}
}