Quickstart

Make your first request in 5 minutes

Create an account, get an API key, and call 678API from any OpenAI-compatible client.

Sign in to 678API

Create an account with email or an enabled third-party login method.

Get credits

Top up online or redeem a code in the wallet page, or use an active subscription.

Create an API key

Create a key in the console and store it securely.

Configure your client

Use https://www.678api.com/v1 as the Base URL and paste your API key.

text

curl https://www.678api.com/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5.5",
"messages": [{"role": "user", "content": "Hello 678API"}]
}'