Zukko Blog
Guides to Claude Code, Cursor, Codex and the Claude and GPT APIs: setup, token savings and troubleshooting.
The $0.50 channel-subscription bonus: how to claim it
4 min · · payments
There is no starting balance on signup anymore — that practice was scrapped due to disposable-email farming. Subscribing to the channel is now the only way to get $0.50 for free.
Paying for Claude and GPT API access from Kazakhstan and the CIS
4 min · · payments
Official Anthropic and OpenAI accounts need a card and billing address from a supported country. Here is which zukko.pro payment methods actually work from the CIS, and which do not.
Paying via SBP (Faster Payments System): step by step
5 min · · payments
SBP is the fastest way to top up a balance without entering card details. Here is the full path from the dashboard to bank app confirmation, and the usual places a payment can stall.
Paying with a foreign Mastercard EU card
5 min · · payments
Since September 16, 2026, you can top up your balance with a foreign Mastercard card through a separate Fride processor. Here is how it works and why payments sometimes get declined.
What a very long context actually costs you
4 min · · payments
A million-token context window sounds like permission to stop worrying. In practice you pay for it in more than one currency.
Why input and output tokens are priced differently
4 min · · payments
Same token counter, two different rates. Here is where the gap comes from and why it matters for how you build.
How the price of a text request is calculated, start to finish
5 min · · payments
Between sending a request and paying for it there are several steps, and nearly every one is a place to either save money or lose track of spend.
How image generation pricing works
4 min · · изображения
An image is billed at a flat rate per piece, not per token. Where to find a model's exact price and how to confirm what a request actually charged.
Do you need a VPN for the Claude and GPT APIs
2 min · · access
A VPN solves the wrong problem. What is blocked is the payment, not the address — and your exit IP does not change that.
Paying for Cursor from Russia: connect your own API key
3 min · · cursor
Cursor's subscription needs a foreign card, but the editor can talk to any OpenAI-compatible API with your own key.
How to pay for the Claude API from Russia in 2026
3 min · · payments
Anthropic does not accept cards issued by Russian banks. Three routes that work, with the honest caveats for each.
Paying for AI models with crypto: how it actually works
3 min · · payments
Neither Anthropic nor OpenAI accepts crypto, so the real question is about intermediaries. What to watch for, and what crypto does not buy you.