FAQ¶
What is Claudin.io, exactly?¶
An API proxy for AI coding agents. You pay a flat monthly subscription and get an OpenAI/Anthropic-compatible API key you can drop into Claude Code, Kilo, Zed, Codex, Cursor, or any OpenAI client. No per-token billing.
Is it really unlimited?¶
Usage is unlimited — there's no request counter or token meter. The only limit is a spend-protection cap per time window that stops a runaway agent from draining your plan. In normal interactive work you rarely hit it. See Plans & limits.
Can I use it for things that aren't coding?¶
The API is OpenAI-compatible, so any request technically works. But the service is built for AI programming: routing, prompts and caching are all tuned for coding agents. Activity that isn't programming-related — general chat bots, non-coding automation — may get special routing and be served by a different model or tier than coding traffic.
What model do I use?¶
Always claudinio (or claudinio/claudinio for clients that want
provider/model form). The base URL is https://api.claudin.io.
Do I authenticate with Authorization or x-api-key?¶
Either works. Authorization: Bearer YOUR_API_KEY or x-api-key: YOUR_API_KEY.
Can I use it with a tool that isn't listed?¶
Yes — any tool that lets you set a custom OpenAI base URL works. Use the generic OpenAI setup.
Does it support tool / function calling?¶
Yes. That's why it works inside agentic editors. Pass tools and read
tool_calls like with the OpenAI API.
Can it handle images, audio, or video?¶
Yes, transparently. Send standard OpenAI content blocks; the proxy converts images/audio/video to text descriptions or transcriptions before the model sees them. Nothing special to configure.
What's the context window?¶
256K tokens.
How do I upgrade or cancel?¶
From your dashboard. Upgrades apply immediately (via Stripe). If you cancel, you keep your paid plan until the end of the period you already paid for, then drop to Free automatically.
Can I get a refund?¶
Within 48 hours of your first payment, yes — write to support@claudin.io from your account's email. The subscription ends immediately, and you get back what you paid minus a usage and handling fee that covers the cost of the model usage your account made in that time (never more than you paid). Tried it for a day and it wasn't for you? You get almost everything back. Ran it at the hourly ceiling for two days? Expect little or nothing. After 48 hours there are no refunds; cancelling keeps your plan until the end of the paid period. Full wording in the Terms.
I hit a budget error. What now?¶
You reached the current window's spend-protection cap. Either wait for the window to reset (your dashboard shows when) or upgrade for a bigger cap.
A request failed with 401.¶
Your key is missing or wrong. Re-copy it from the dashboard and make sure there's no extra whitespace, and that the auth header is set.
My key leaked. What do I do?¶
Revoke it from the dashboard and generate a new one immediately. Treat keys like passwords — never commit them or share them publicly.
Where do I get help?¶
Open a ticket from the Support card in your dashboard, or email support. We'll get back to you.