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OpenAI API Access — No OpenAI Account, Pay-as-You-Go

Access the OpenAI API through ClaudeStore. One universal key, OpenAI-compatible endpoints, the latest OpenAI models, crypto or card billing — no OpenAI account and no waitlist.

Base URL: https://api3.claudestore.store/v1. Endpoints: /v1/chat/completions, /v1/responses. API key: sk-cs4-* (Codex tier). Billing: Pay-as-you-go credits.

TL;DR

ClaudeStore gives you OpenAI API access through the same account and credits you use for Claude. Switch a universal key to the ClaudeStore Codex tier and call the OpenAI-compatible endpoints at https://api3.claudestore.store/v1.

Why ClaudeStore for the OpenAI API

  • No OpenAI account — no separate signup, no organization verification, no waitlist.
  • Latest OpenAI models — request the current models (e.g. gpt-5.5); call GET /v1/models for the live list.
  • One key for everything — the same sk-cs4 universal key serves Claude (Basic/Pro) and the OpenAI API (Codex).
  • Fully OpenAI-compatible — Chat Completions and Responses APIs, OpenAI SDK, Codex CLI, and OpenAI-compatible IDEs.
  • Pay-as-you-go — crypto or card, no subscription.

Quick start

OpenAI SDK against ClaudeStorepython
from openai import OpenAI

client = OpenAI(
    api_key="sk-cs4-your-key",
    base_url="https://api3.claudestore.store/v1",
)

resp = client.chat.completions.create(
    model="gpt-5.5",
    messages=[{"role": "user", "content": "Write a haiku about TCP."}],
)
print(resp.choices[0].message.content)

Where to go next

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