OpenAI Agents SDK
How to use GATE/0 with OpenAI Agents SDK
Introduction
The OpenAI Agents SDK provides a lightweight, production-ready framework for building agentic AI applications with minimal abstractions. It introduces powerful core primitives — Agents, Handoffs, and Guardrails — that simplify the creation of complex, tool-using LLM workflows in Python.
GATE/0 integrates seamlessly with the OpenAI Agents SDK and is fully compatible with its API layer. The following guide walks you through using GATE/0 with the SDK.
Using GATE/0 with the OpenAI Agents SDK
Set up your OpenAI provider in GATE/0
Install OpenAI Agents SDK
pip install openai-agentsConfigure the GATE/0 API key Set your GATE/0 API key as an environment variable:
export GATE0_API_KEY=your-gate0-api-keyImplement your agent
import asyncio
import os
from agents import (
Agent,
Runner,
OpenAIResponsesModel,
ModelSettings
)
from openai import AsyncOpenAI
async def main():
client = AsyncOpenAI(
base_url="https://gateway.gate.io/v1", # GATE0 cloud proxy URL
api_key=os.environ.get("GATE0_API_KEY") # API key provided by GATE0
)
agent = Agent(
name="Assistant",
instructions="You only respond in haikus.",
model=OpenAIResponsesModel(
model="openai/gpt-4o", # Model name with provider prefix
openai_client=client
),
model_settings=ModelSettings(
extra_headers={ # Custom labels
'x-gate0-label-project': 'alpha',
'x-gate0-label-client': 'frontend',
'x-gate0-label-env': 'prod'
}
),
)
result = await Runner.run(agent, "Tell me about recursion in programming.")
print(result.final_output)
if __name__ == "__main__":
asyncio.run(main())Explanation of the implementation
- An instance of
AsyncOpenAIis created with the base URL set tohttps://gateway.gate0.io/v1, using your GATE0 API key instead of the default OpenAI key. - An
OpenAIResponsesModelis initialized with the client and a prefixed model name. Make sure the model name is prefixed with the provider slug (e.g., useopenai/gpt-4oinstead ofgpt-4o). - A
ModelSettingsinstance is created withextra_headersto include custom labels — useful for resource allocation and cost tracking. - The
modelandmodel_settingsobjects are passed to theAgentconstructor to finalize the setup.