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X420.ai

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FAQ

Quick FAQ

What is X420.ai?

X420.ai sells prepaid GPT-5.5 API credits through an OpenAI-compatible endpoint with wallet balance and spending limits.

Is X420.ai OpenAI?

No. X420.ai is a separate prepaid API credit service compatible with OpenAI-style requests.

How does pricing work?

Choose an amount, pay securely, and receive twice that amount as official-value GPT-5.5 API credit when the pack is confirmed.

What endpoint do developers use?

Use https://api.x420.ai/v1 as the base URL with your X420 API key.

Is Claude Pro available?

Not yet. The Claude Pro offer is listed as coming soon and checkout stays disabled until it opens.

Yes. Set base_url to https://api.x420.ai/v1 and use your X420.ai API key.

The enabled model list is returned by GET /v1/models. The default model is openai/gpt-5.5 and more models can be enabled by configuration.

Each X420 API key can have a spending cap. Requests reserve estimated credit before the upstream call and settle actual token usage afterward.

API calls are rejected with an insufficient credits error. Buy more credit to resume.

Yes. Treat it like a password. If compromised, revoke or rotate it immediately from the Dashboard.

Yes. Pass stream: true in your request body and consume the standard SSE stream.