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OpenAI

Responses API

Build chat, search, document analysis, and agent workflows from one AI endpoint.

Endpoint

POST /v1/responses

Starting price

$0.25 / 1M input tokens

Latency

420ms

Uptime

99.97%

4.9 (3,120 reviews)

Tech specs

Version

v1.8

Format

HTTPS + JSON

Supported SDKs

NodePythonGo

API detail dashboard

How it works

Open the detail page, review the request and response shape, test in sandbox with your account email, then move the same API to premium production usage.

Base URL

https://api.openai.com

Auth

Bearer API key

Adoption options

Understand the free path before you talk to the provider

Free access

500 requests/day

Sandbox requests
Basic examples
Shared rate limits

Premium access

Custom token throughput

Production keys
Higher throughput
Priority support

Visit official provider Register for monitoring

Provider notes

Free sandbox for testing prompts
Premium pricing scales by token usage
Production keys unlock higher throughput

Integration flow

What your team does next

Step 1

Create a sandbox key

Step 2

Send a responses request

Step 3

Inspect the tool output

Step 4

Upgrade to premium for live traffic

Sample request

curl --request POST 'https://api.openai.com/v1/responses' \
  --header 'Accept: application/json' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data-raw '{
  "model": "gpt-4.1-mini",
  "input": "Summarize yesterday\'s support logs"
}'

Sample response

{
  "id": "resp_01hzk8...",
  "model": "gpt-4.1-mini",
  "output_text": "Yesterday support volume dropped 8%.",
  "usage": {
    "input_tokens": 128,
    "output_tokens": 42
  }
}

Access model

Compare Responses API and decide how to adopt it

Shortlist this API first, then log in when you are ready to connect your own provider key.

Lead-gen marketplace flow

Starter

$59

public entry signal

Save 18%

For prototypes, copilots, and early product testing.

2M tokens / month

Email support

Growth

$179

public entry signal

Save 20%

For production AI features and team workspaces.

12M tokens / month

Priority support

Scale

$449

public entry signal

Custom annual contract

For heavy inference, multilingual ops, and custom throughput.

Custom throughput

Dedicated solutions engineer

Shortlist status

Save this API if you want to compare it with other providers before connecting keys.

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What APIverse does

Compare

Cleaner docs, request/response examples, and shortlist-driven research across providers.

Connect

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Visit official source

Go to the official provider for signup, legal terms, billing, or partner-specific access requirements.

3120 reviews

Best for

AI assistantsStructured extractionRAG workflows

Supported regions

Global

Response highlights

output_texttool_callsusage tokensresponse id