Anthropic-compatible protocol

Call Claude models with the native Messages API

Anthropic Messages uses its own message shape and headers. Base URL is https://api.bianxie.ai; use a model ID from the live model page.

Request

curl https://api.bianxie.ai/v1/messages \
  -H "x-api-key: API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "your-model",
    "max_tokens": 1024,
    "messages": [{
      "role": "user",
      "content": "Explain quantum entanglement in one paragraph."
    }]
  }'

max_tokens is required. Pass system instructions in the top-level system field, not as an OpenAI-style system message. Add "stream": true for SSE streaming.

Response shape

{
  "id": "msg_example",
  "type": "message",
  "role": "assistant",
  "model": "your-model",
  "content": [{"type": "text", "text": "Quantum entanglement is..."}],
  "stop_reason": "end_turn",
  "stop_sequence": null,
  "usage": {"input_tokens": 18, "output_tokens": 42}
}

Read text blocks from content[]. Tool calls use other content-block types; streaming emits message and content-block events.