curl -sS -N "https://api.isoquant.ai/v1/chat/completions" \
  -H "Authorization: Bearer $ISOQUANT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "glm-5.3-flash",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "max_tokens": 1024,
  "stream": true,
  "stream_options": {
    "include_usage": true
  }
}'

import json
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.isoquant.ai/v1",
    api_key=os.environ["ISOQUANT_API_KEY"],
)
model = "glm-5.3-flash"

def lookup_order(name, arguments, call_id):
    if not call_id or name != "lookup_order" or arguments != {"id": "A"}:
        raise ValueError("Unexpected tool call")
    return json.dumps({"id": "A", "status": "shipped"})

schema = {
    "type": "object", "properties": {"id": {"type": "string"}},
    "required": ["id"], "additionalProperties": False,
}
tools = [{"type": "function", "function": {
    "name": "lookup_order", "parameters": schema,
}}]
messages = [{"role": "user", "content": "Look up order A."}]
response = client.chat.completions.create(
    model=model, messages=messages, tools=tools, max_tokens=1024,
    tool_choice={"type": "function", "function": {"name": "lookup_order"}},
)
assistant = response.choices[0].message
if response.choices[0].finish_reason != "tool_calls" or not assistant.tool_calls:
    raise RuntimeError("No complete tool call returned")
messages.append(assistant.model_dump(exclude_none=True))
for call in assistant.tool_calls:
    result = lookup_order(call.function.name, json.loads(call.function.arguments), call.id)
    messages.append({"role": "tool", "tool_call_id": call.id, "content": result})
response = client.chat.completions.create(
    model=model, messages=messages, tools=tools, max_tokens=1024,
    tool_choice="none",
)
print(response.choices[0].message.content)

{
  "error": {
    "message": "Valid Bearer or x-api-key authentication required",
    "type": "gateway_error",
    "code": "invalid_api_key"
  }
}