[Feature][Responses API]Support MCP tools with streaming mode + background mode #23927

wuhang2014 · 2025-08-29T10:18:56Z

Purpose

Fix #23295 especially for streaming response

Test Plan

import asyncio, time

import openai

MODEL = "/home/models/gpt-oss-20b"
client = openai.AsyncOpenAI(api_key="my_key", base_url="http://127.0.0.1:8000/v1")


async def main_stream_background():
    response = await client.responses.create(
        model=MODEL,
        input="Multiply 64548*15151 using python code interpreter.",
        tools=[{
            "type": "code_interpreter",
            "container": {
                "type": "auto"
            }
        }],
        stream=True,
        background=True,
    )

    # stream=True
    cursor = None
    resp_id = None
    async for event in response:
        cursor = event.sequence_number
        if event.type == "response.created":
            resp_id = event.response.id
        print(f"{event=}")
        if cursor == 100:
            break

    print("="*36)

    async with await client.responses.retrieve(response_id=resp_id, stream=True, starting_after=90) as stream:
        async for event in stream:
            print(f"{event=}")

# Run the async function
if __name__ == "__main__":
    asyncio.run(main_stream_background())

Test Result

streaming response

event=ResponseCreatedEvent(response=Response(id='resp_05238f1b33304f71995c210942619de4', created_at=1756464260.0, error=None, incomplete_details=None, instructions=None, metadata=None, model='/home/models/gpt-oss-20b', object='response', output=[], parallel_tool_calls=True, temperature=1.0, tool_choice='auto', tools=[CodeInterpreter(container=CodeInterpreterContainerCodeInterpreterToolAuto(type='auto', file_ids=None), type='code_interpreter')], top_p=1.0, background=True, max_output_tokens=130927, max_tool_calls=None, previous_response_id=None, prompt=None, prompt_cache_key=None, reasoning=None, safety_identifier=None, service_tier='auto', status='in_progress', text=None, top_logprobs=None, truncation='disabled', usage=None, user=None), sequence_number=0, type='response.created')
event=ResponseInProgressEvent(response=Response(id='resp_05238f1b33304f71995c210942619de4', created_at=1756464260.0, error=None, incomplete_details=None, instructions=None, metadata=None, model='/home/models/gpt-oss-20b', object='response', output=[], parallel_tool_calls=True, temperature=1.0, tool_choice='auto', tools=[CodeInterpreter(container=CodeInterpreterContainerCodeInterpreterToolAuto(type='auto', file_ids=None), type='code_interpreter')], top_p=1.0, background=True, max_output_tokens=130927, max_tool_calls=None, previous_response_id=None, prompt=None, prompt_cache_key=None, reasoning=None, safety_identifier=None, service_tier='auto', status='in_progress', text=None, top_logprobs=None, truncation='disabled', usage=None, user=None), sequence_number=1, type='response.in_progress')
event=ResponseOutputItemAddedEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=None, encrypted_content=None, status='in_progress'), output_index=0, sequence_number=2, type='response.output_item.added')
event=ResponseContentPartAddedEvent(content_index=0, item_id='', output_index=0, part=ResponseOutputText(annotations=[], text='', type='output_text', logprobs=[]), sequence_number=3, type='response.content_part.added')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='We', item_id='', output_index=0, sequence_number=4, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' need', item_id='', output_index=0, sequence_number=5, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' to', item_id='', output_index=0, sequence_number=6, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' multiply', item_id='', output_index=0, sequence_number=7, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' ', item_id='', output_index=0, sequence_number=8, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='645', item_id='', output_index=0, sequence_number=9, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='48', item_id='', output_index=0, sequence_number=10, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' *', item_id='', output_index=0, sequence_number=11, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' ', item_id='', output_index=0, sequence_number=12, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='151', item_id='', output_index=0, sequence_number=13, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='51', item_id='', output_index=0, sequence_number=14, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=0, sequence_number=15, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' Use', item_id='', output_index=0, sequence_number=16, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' python', item_id='', output_index=0, sequence_number=17, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' code', item_id='', output_index=0, sequence_number=18, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' interpreter', item_id='', output_index=0, sequence_number=19, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=0, sequence_number=20, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' Just', item_id='', output_index=0, sequence_number=21, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' compute', item_id='', output_index=0, sequence_number=22, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' product', item_id='', output_index=0, sequence_number=23, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=0, sequence_number=24, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=" Let's", item_id='', output_index=0, sequence_number=25, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' calculate', item_id='', output_index=0, sequence_number=26, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=0, sequence_number=27, type='response.reasoning_text.delta')
event=ResponseReasoningTextDoneEvent(content_index=0, item_id='', output_index=1, sequence_number=28, text="We need to multiply 64548 * 15151. Use python code interpreter. Just compute product. Let's calculate.", type='response.reasoning_text.done')
event=ResponseOutputItemDoneEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=[Content(text="We need to multiply 64548 * 15151. Use python code interpreter. Just compute product. Let's calculate.", type='reasoning_text')], encrypted_content=None, status='completed'), output_index=1, sequence_number=29, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseCodeInterpreterToolCall(id='', code=None, container_id='auto', outputs=None, status='in_progress', type='code_interpreter_call'), output_index=1, sequence_number=30, type='response.output_item.added')
event=ResponseCodeInterpreterCallInProgressEvent(item_id='', output_index=1, sequence_number=31, type='response.code_interpreter_call.in_progress')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='645', item_id='', output_index=1, sequence_number=32, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='48', item_id='', output_index=1, sequence_number=33, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta=' *', item_id='', output_index=1, sequence_number=34, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta=' ', item_id='', output_index=1, sequence_number=35, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='151', item_id='', output_index=1, sequence_number=36, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='51', item_id='', output_index=1, sequence_number=37, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDoneEvent(code='64548 * 15151', item_id='', output_index=2, sequence_number=38, type='response.code_interpreter_call_code.done')
event=ResponseCodeInterpreterCallInterpretingEvent(item_id='', output_index=2, sequence_number=39, type='response.code_interpreter_call.interpreting')
event=ResponseCodeInterpreterCallCompletedEvent(item_id='', output_index=2, sequence_number=40, type='response.code_interpreter_call.completed')
event=ResponseOutputItemDoneEvent(item=ResponseCodeInterpreterToolCall(id='', code='64548 * 15151', container_id='auto', outputs=[], status='completed', type='code_interpreter_call'), output_index=2, sequence_number=41, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=None, encrypted_content=None, status='in_progress'), output_index=2, sequence_number=42, type='response.output_item.added')
event=ResponseContentPartAddedEvent(content_index=0, item_id='', output_index=2, part=ResponseOutputText(annotations=[], text='', type='output_text', logprobs=[]), sequence_number=43, type='response.content_part.added')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta="Let's", item_id='', output_index=2, sequence_number=44, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' print', item_id='', output_index=2, sequence_number=45, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' result', item_id='', output_index=2, sequence_number=46, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=2, sequence_number=47, type='response.reasoning_text.delta')
event=ResponseReasoningTextDoneEvent(content_index=0, item_id='', output_index=3, sequence_number=48, text="Let's print result.", type='response.reasoning_text.done')
event=ResponseOutputItemDoneEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=[Content(text="Let's print result.", type='reasoning_text')], encrypted_content=None, status='completed'), output_index=3, sequence_number=49, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseCodeInterpreterToolCall(id='', code=None, container_id='auto', outputs=None, status='in_progress', type='code_interpreter_call'), output_index=3, sequence_number=50, type='response.output_item.added')
event=ResponseCodeInterpreterCallInProgressEvent(item_id='', output_index=3, sequence_number=51, type='response.code_interpreter_call.in_progress')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='645', item_id='', output_index=3, sequence_number=52, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='48', item_id='', output_index=3, sequence_number=53, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta=' *', item_id='', output_index=3, sequence_number=54, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta=' ', item_id='', output_index=3, sequence_number=55, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='151', item_id='', output_index=3, sequence_number=56, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='51', item_id='', output_index=3, sequence_number=57, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDoneEvent(code='64548 * 15151', item_id='', output_index=4, sequence_number=58, type='response.code_interpreter_call_code.done')
event=ResponseCodeInterpreterCallInterpretingEvent(item_id='', output_index=4, sequence_number=59, type='response.code_interpreter_call.interpreting')
event=ResponseCodeInterpreterCallCompletedEvent(item_id='', output_index=4, sequence_number=60, type='response.code_interpreter_call.completed')
event=ResponseOutputItemDoneEvent(item=ResponseCodeInterpreterToolCall(id='', code='64548 * 15151', container_id='auto', outputs=[], status='completed', type='code_interpreter_call'), output_index=4, sequence_number=61, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=None, encrypted_content=None, status='in_progress'), output_index=4, sequence_number=62, type='response.output_item.added')
event=ResponseContentPartAddedEvent(content_index=0, item_id='', output_index=4, part=ResponseOutputText(annotations=[], text='', type='output_text', logprobs=[]), sequence_number=63, type='response.content_part.added')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='Maybe', item_id='', output_index=4, sequence_number=64, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' we', item_id='', output_index=4, sequence_number=65, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' need', item_id='', output_index=4, sequence_number=66, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' to', item_id='', output_index=4, sequence_number=67, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' run', item_id='', output_index=4, sequence_number=68, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' correctly', item_id='', output_index=4, sequence_number=69, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=4, sequence_number=70, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=" Let's", item_id='', output_index=4, sequence_number=71, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' do', item_id='', output_index=4, sequence_number=72, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' print', item_id='', output_index=4, sequence_number=73, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=4, sequence_number=74, type='response.reasoning_text.delta')
event=ResponseReasoningTextDoneEvent(content_index=0, item_id='', output_index=5, sequence_number=75, text="Maybe we need to run correctly. Let's do print.", type='response.reasoning_text.done')
event=ResponseOutputItemDoneEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=[Content(text="Maybe we need to run correctly. Let's do print.", type='reasoning_text')], encrypted_content=None, status='completed'), output_index=5, sequence_number=76, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseCodeInterpreterToolCall(id='', code=None, container_id='auto', outputs=None, status='in_progress', type='code_interpreter_call'), output_index=5, sequence_number=77, type='response.output_item.added')
event=ResponseCodeInterpreterCallInProgressEvent(item_id='', output_index=5, sequence_number=78, type='response.code_interpreter_call.in_progress')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='print', item_id='', output_index=5, sequence_number=79, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='(', item_id='', output_index=5, sequence_number=80, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='645', item_id='', output_index=5, sequence_number=81, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='48', item_id='', output_index=5, sequence_number=82, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta=' *', item_id='', output_index=5, sequence_number=83, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta=' ', item_id='', output_index=5, sequence_number=84, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='151', item_id='', output_index=5, sequence_number=85, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta='51', item_id='', output_index=5, sequence_number=86, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDeltaEvent(delta=')', item_id='', output_index=5, sequence_number=87, type='response.code_interpreter_call_code.delta')
event=ResponseCodeInterpreterCallCodeDoneEvent(code='print(64548 * 15151)', item_id='', output_index=6, sequence_number=88, type='response.code_interpreter_call_code.done')
event=ResponseCodeInterpreterCallInterpretingEvent(item_id='', output_index=6, sequence_number=89, type='response.code_interpreter_call.interpreting')
event=ResponseCodeInterpreterCallCompletedEvent(item_id='', output_index=6, sequence_number=90, type='response.code_interpreter_call.completed')
event=ResponseOutputItemDoneEvent(item=ResponseCodeInterpreterToolCall(id='', code='print(64548 * 15151)', container_id='auto', outputs=[], status='completed', type='code_interpreter_call'), output_index=6, sequence_number=91, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=None, encrypted_content=None, status='in_progress'), output_index=6, sequence_number=92, type='response.output_item.added')
event=ResponseContentPartAddedEvent(content_index=0, item_id='', output_index=6, part=ResponseOutputText(annotations=[], text='', type='output_text', logprobs=[]), sequence_number=93, type='response.content_part.added')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='Thus', item_id='', output_index=6, sequence_number=94, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' product', item_id='', output_index=6, sequence_number=95, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='=', item_id='', output_index=6, sequence_number=96, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='977', item_id='', output_index=6, sequence_number=97, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=',', item_id='', output_index=6, sequence_number=98, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='966', item_id='', output_index=6, sequence_number=99, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=',', item_id='', output_index=6, sequence_number=100, type='response.reasoning_text.delta')
====================================
event=ResponseOutputItemDoneEvent(item=ResponseCodeInterpreterToolCall(id='', code='print(64548 * 15151)', container_id='auto', outputs=[], status='completed', type='code_interpreter_call'), output_index=6, sequence_number=91, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=None, encrypted_content=None, status='in_progress'), output_index=6, sequence_number=92, type='response.output_item.added')
event=ResponseContentPartAddedEvent(content_index=0, item_id='', output_index=6, part=ResponseOutputText(annotations=[], text='', type='output_text', logprobs=[]), sequence_number=93, type='response.content_part.added')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='Thus', item_id='', output_index=6, sequence_number=94, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' product', item_id='', output_index=6, sequence_number=95, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='=', item_id='', output_index=6, sequence_number=96, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='977', item_id='', output_index=6, sequence_number=97, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=',', item_id='', output_index=6, sequence_number=98, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='966', item_id='', output_index=6, sequence_number=99, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=',', item_id='', output_index=6, sequence_number=100, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='748', item_id='', output_index=6, sequence_number=101, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=6, sequence_number=102, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta=' Provide', item_id='', output_index=6, sequence_number=103, type='response.reasoning_text.delta')
event=ResponseReasoningTextDeltaEvent(content_index=0, delta='.', item_id='', output_index=6, sequence_number=104, type='response.reasoning_text.delta')
event=ResponseReasoningTextDoneEvent(content_index=0, item_id='', output_index=7, sequence_number=105, text='Thus product=977,966,748. Provide.', type='response.reasoning_text.done')
event=ResponseOutputItemDoneEvent(item=ResponseReasoningItem(id='', summary=[], type='reasoning', content=[Content(text='Thus product=977,966,748. Provide.', type='reasoning_text')], encrypted_content=None, status='completed'), output_index=7, sequence_number=106, type='response.output_item.done')
event=ResponseOutputItemAddedEvent(item=ResponseOutputMessage(id='', content=[], role='assistant', status='in_progress', type='message'), output_index=7, sequence_number=107, type='response.output_item.added')
event=ResponseContentPartAddedEvent(content_index=0, item_id='', output_index=7, part=ResponseOutputText(annotations=[], text='', type='output_text', logprobs=[]), sequence_number=108, type='response.content_part.added')
event=ResponseTextDeltaEvent(content_index=0, delta='Multip', item_id='', logprobs=[], output_index=7, sequence_number=109, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='lying', item_id='', logprobs=[], output_index=7, sequence_number=110, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' the', item_id='', logprobs=[], output_index=7, sequence_number=111, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' two', item_id='', logprobs=[], output_index=7, sequence_number=112, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' numbers', item_id='', logprobs=[], output_index=7, sequence_number=113, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=':\n\n', item_id='', logprobs=[], output_index=7, sequence_number=114, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='\\', item_id='', logprobs=[], output_index=7, sequence_number=115, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='[\n', item_id='', logprobs=[], output_index=7, sequence_number=116, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='645', item_id='', logprobs=[], output_index=7, sequence_number=117, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='48', item_id='', logprobs=[], output_index=7, sequence_number=118, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' \\', item_id='', logprobs=[], output_index=7, sequence_number=119, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='times', item_id='', logprobs=[], output_index=7, sequence_number=120, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' ', item_id='', logprobs=[], output_index=7, sequence_number=121, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='151', item_id='', logprobs=[], output_index=7, sequence_number=122, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='51', item_id='', logprobs=[], output_index=7, sequence_number=123, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' =', item_id='', logprobs=[], output_index=7, sequence_number=124, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' ', item_id='', logprobs=[], output_index=7, sequence_number=125, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='977', item_id='', logprobs=[], output_index=7, sequence_number=126, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=',', item_id='', logprobs=[], output_index=7, sequence_number=127, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='966', item_id='', logprobs=[], output_index=7, sequence_number=128, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=',', item_id='', logprobs=[], output_index=7, sequence_number=129, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='748', item_id='', logprobs=[], output_index=7, sequence_number=130, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='\n', item_id='', logprobs=[], output_index=7, sequence_number=131, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='\\', item_id='', logprobs=[], output_index=7, sequence_number=132, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=']\n\n', item_id='', logprobs=[], output_index=7, sequence_number=133, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='So', item_id='', logprobs=[], output_index=7, sequence_number=134, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' the', item_id='', logprobs=[], output_index=7, sequence_number=135, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' product', item_id='', logprobs=[], output_index=7, sequence_number=136, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' is', item_id='', logprobs=[], output_index=7, sequence_number=137, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=' **', item_id='', logprobs=[], output_index=7, sequence_number=138, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='977', item_id='', logprobs=[], output_index=7, sequence_number=139, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=',', item_id='', logprobs=[], output_index=7, sequence_number=140, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='966', item_id='', logprobs=[], output_index=7, sequence_number=141, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta=',', item_id='', logprobs=[], output_index=7, sequence_number=142, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='748', item_id='', logprobs=[], output_index=7, sequence_number=143, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='**', item_id='', logprobs=[], output_index=7, sequence_number=144, type='response.output_text.delta')
event=ResponseTextDeltaEvent(content_index=0, delta='.', item_id='', logprobs=[], output_index=7, sequence_number=145, type='response.output_text.delta')
event=ResponseTextDoneEvent(content_index=0, item_id='', logprobs=[], output_index=8, sequence_number=146, text='Multiplying the two numbers:\n\n\\[\n64548 \\times 15151 = 977,966,748\n\\]\n\nSo the product is **977,966,748**.', type='response.output_text.done')
event=ResponseContentPartDoneEvent(content_index=0, item_id='', output_index=8, part=ResponseOutputText(annotations=[], text='Multiplying the two numbers:\n\n\\[\n64548 \\times 15151 = 977,966,748\n\\]\n\nSo the product is **977,966,748**.', type='output_text', logprobs=None), sequence_number=147, type='response.content_part.done')
event=ResponseOutputItemDoneEvent(item=ResponseOutputMessage(id='', content=[ResponseOutputText(annotations=[], text='Multiplying the two numbers:\n\n\\[\n64548 \\times 15151 = 977,966,748\n\\]\n\nSo the product is **977,966,748**.', type='output_text', logprobs=None)], role='assistant', status='completed', type='message'), output_index=8, sequence_number=148, type='response.output_item.done')
event=ResponseCompletedEvent(response=Response(id='resp_05238f1b33304f71995c210942619de4', created_at=1756464260.0, error=None, incomplete_details=None, instructions=None, metadata=None, model='/home/models/gpt-oss-20b', object='response', output=[ResponseReasoningItem(id='rs_f401c9d2a7c246c6a1ee2ed527fdc87c', summary=[], type='reasoning', content=[Content(text="Let's print result.", type='reasoning_text')], encrypted_content=None, status=None), ResponseReasoningItem(id='rs_b1859a33d4a547538c907db5ff2fc56d', summary=[], type='reasoning', content=[Content(text='64548 * 15151', type='reasoning_text')], encrypted_content=None, status=None), ResponseReasoningItem(id='rs_4f316d86b9964e50b91763b1875d4fc1', summary=[], type='reasoning', content=[Content(text="Maybe we need to run correctly. Let's do print.", type='reasoning_text')], encrypted_content=None, status=None), ResponseReasoningItem(id='rs_d24120aa7b6d4683b4545a2fa280421f', summary=[], type='reasoning', content=[Content(text='print(64548 * 15151)', type='reasoning_text')], encrypted_content=None, status=None), ResponseReasoningItem(id='rs_956b4a673c3141edbbb968d72e5e7baa', summary=[], type='reasoning', content=[Content(text='Thus product=977,966,748. Provide.', type='reasoning_text')], encrypted_content=None, status=None), ResponseOutputMessage(id='msg_13a366e0c30a45289327065411b4fa41', content=[ResponseOutputText(annotations=[], text='Multiplying the two numbers:\n\n\\[\n64548 \\times 15151 = 977,966,748\n\\]\n\nSo the product is **977,966,748**.', type='output_text', logprobs=None)], role='assistant', status='completed', type='message')], parallel_tool_calls=True, temperature=1.0, tool_choice='auto', tools=[CodeInterpreter(container=CodeInterpreterContainerCodeInterpreterToolAuto(type='auto', file_ids=None), type='code_interpreter')], top_p=1.0, background=True, max_output_tokens=130915, max_tool_calls=None, previous_response_id=None, prompt=None, prompt_cache_key=None, reasoning=None, safety_identifier=None, service_tier='auto', status='completed', text=None, top_logprobs=None, truncation='disabled', usage=ResponseUsage(input_tokens=475, input_tokens_details=InputTokensDetails(cached_tokens=0), output_tokens=162, output_tokens_details=OutputTokensDetails(reasoning_tokens=0), total_tokens=637), user=None), sequence_number=149, type='response.completed')

Essential Elements of an Effective PR Description Checklist

The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
The test plan, such as providing test command.
The test results, such as pasting the results comparison before and after, or e2e results
(Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.
(Optional) Release notes update. If your change is user facing, please update the release notes draft in the Google Doc.

Signed-off-by: wuhang <[email protected]>

wuhang2014 · 2025-08-29T10:56:15Z

cc @heheda12345

Signed-off-by: wuhang <[email protected]>

heheda12345

Thanks for your contribution. I left some comments. And can you add a test in https://github.com/vllm-project/vllm/blob/main/tests/entrypoints/openai/test_response_api_with_harmony.py?

vllm/entrypoints/openai/serving_responses.py

heheda12345 · 2025-08-30T04:39:36Z

/gemini review

gemini-code-assist

Code Review

This pull request adds support for MCP tools with streaming and background modes in the Responses API. The changes involve updating the retrieve_responses API endpoint to handle streaming and introducing new logic to manage background streaming requests.

My review focuses on two main points:

A potential deadlock in the new background stream generator due to a race condition. I've provided a suggestion to fix this.
A memory leak in the new event_store, which could be problematic in production.

Overall, the changes look good and align with the feature goal, but these two issues should be addressed.

vllm/entrypoints/openai/serving_responses.py

Signed-off-by: wuhang <[email protected]>

heheda12345

LGTM! Thanks for the great job!

…round mode (vllm-project#23927) Signed-off-by: wuhang <[email protected]>

wuhang2014 added 7 commits August 29, 2025 02:55

support mcp tools streaming response in background mode

5e08275

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

72de2fc

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

d71f945

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

a17a3bd

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

114a343

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

5400086

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

3582a05

Signed-off-by: wuhang <[email protected]>

mergify bot added the frontend label Aug 29, 2025

wuhang2014 added 2 commits August 29, 2025 10:27

support mcp tools streaming response in background mode

ddbb475

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

eb4401b

Signed-off-by: wuhang <[email protected]>

wuhang2014 marked this pull request as ready for review August 29, 2025 10:48

wuhang2014 requested a review from aarnphm as a code owner August 29, 2025 10:48

support mcp tools streaming response in background mode

49631fe

Signed-off-by: wuhang <[email protected]>

wuhang2014 changed the title ~~[Feature][Responses API]Support MCP tools with streaming response in background mode~~ [Feature][Responses API]Support MCP tools with streaming mode + background mode Aug 30, 2025

heheda12345 reviewed Aug 30, 2025

View reviewed changes

vllm/entrypoints/openai/serving_responses.py Show resolved Hide resolved

vllm/entrypoints/openai/serving_responses.py Outdated Show resolved Hide resolved

gemini-code-assist bot reviewed Aug 30, 2025

View reviewed changes

vllm/entrypoints/openai/serving_responses.py Outdated Show resolved Hide resolved

vllm/entrypoints/openai/serving_responses.py Show resolved Hide resolved

wuhang2014 added 2 commits September 1, 2025 01:52

support mcp tools streaming response in background mode

21014f6

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

570b000

Signed-off-by: wuhang <[email protected]>

wuhang2014 requested review from DarkLight1337, robertgshaw2-redhat and simon-mo as code owners September 1, 2025 03:45

wuhang2014 added 2 commits September 1, 2025 03:58

support mcp tools streaming response in background mode

e89d424

Signed-off-by: wuhang <[email protected]>

support mcp tools streaming response in background mode

4bb8cfb

Signed-off-by: wuhang <[email protected]>

wuhang2014 requested a review from heheda12345 September 1, 2025 06:53

Merge branch 'main' into streamingmode_responsesapi

d18dd46

heheda12345 approved these changes Sep 2, 2025

View reviewed changes

heheda12345 enabled auto-merge (squash) September 2, 2025 23:36

github-actions bot added the ready ONLY add when PR is ready to merge/full CI is needed label Sep 2, 2025

wuhang2014 added 3 commits September 3, 2025 09:18

Merge branch 'main' into streamingmode_responsesapi

0699719

Merge branch 'main' into streamingmode_responsesapi

29b2df9

Merge branch 'main' into streamingmode_responsesapi

4983867

heheda12345 merged commit a38f8bd into vllm-project:main Sep 4, 2025
39 checks passed

wuhang2014 deleted the streamingmode_responsesapi branch September 4, 2025 04:53

bfroemel mentioned this pull request Sep 5, 2025

Update v1/responses to be more OpenAI-compatible. sgl-project/sglang#9624

Merged

4 tasks

eicherseiji pushed a commit to eicherseiji/vllm that referenced this pull request Sep 9, 2025

[Feature][Responses API]Support MCP tools with streaming mode + backg…

30e62c8

…round mode (vllm-project#23927) Signed-off-by: wuhang <[email protected]>

FeiDaLI pushed a commit to FeiDaLI/vllm that referenced this pull request Sep 25, 2025

[Feature][Responses API]Support MCP tools with streaming mode + backg…

600812f

…round mode (vllm-project#23927) Signed-off-by: wuhang <[email protected]>

qandrew mentioned this pull request Sep 25, 2025

[Bug][gpt-oss] streaming/tools RuntimeError: Attempted to exit cancel scope in a different task than it was entered in #25697

Open

1 task

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Uh oh!

[Feature][Responses API]Support MCP tools with streaming mode + background mode #23927

[Feature][Responses API]Support MCP tools with streaming mode + background mode #23927

wuhang2014 commented Aug 29, 2025 •

edited by github-actions bot

Loading

Uh oh!

wuhang2014 commented Aug 29, 2025

Uh oh!

heheda12345 left a comment

Uh oh!

Uh oh!

Uh oh!

heheda12345 commented Aug 30, 2025

Uh oh!

gemini-code-assist bot left a comment

Uh oh!

Uh oh!

Uh oh!

heheda12345 left a comment

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

Uh oh!

[Feature][Responses API]Support MCP tools with streaming mode + background mode #23927

[Feature][Responses API]Support MCP tools with streaming mode + background mode #23927

Conversation

wuhang2014 commented Aug 29, 2025 • edited by github-actions bot Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Purpose

Test Plan

Test Result

Uh oh!

wuhang2014 commented Aug 29, 2025

Uh oh!

heheda12345 left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Uh oh!

heheda12345 commented Aug 30, 2025

Uh oh!

gemini-code-assist bot left a comment

Choose a reason for hiding this comment

Code Review

Uh oh!

Uh oh!

Uh oh!

heheda12345 left a comment

Choose a reason for hiding this comment

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

wuhang2014 commented Aug 29, 2025 •

edited by github-actions bot

Loading