Frequently asked questions
Browse by product, billing, getting started, or referrals to find what you need.
About 9Coding
What is 9Coding?
9Coding is an independent third-party model access platform — an API gateway. Over 40 models, including Claude, GPT and Gemini, sit behind a single endpoint. With one key and a one-line base_url change you can call any of them from Claude Code, Cursor, the OpenAI SDK or any HTTP client.
How is it different from the official API? Do I have to change my code?
The interface follows the OpenAI and Anthropic specifications exactly, so your existing code only needs its base_url and key changed. What differs: one key for every model, availability managed by the platform, and a bonus on every top-up.
Stated plainly: 9Coding is a third-party platform with no affiliation to or endorsement from Anthropic, OpenAI or Google. Our answer on reliability is multiple upstream channels with automatic failover — "here today, here tomorrow" is the standard we hold ourselves to.
Which models are supported?
The full Claude lineup (Opus 4.8, Fable 5, Sonnet 5), the full GPT lineup including GPT-5.6, plus Gemini, DeepSeek, Grok and Kimi — over 40 models, with new releases added as they ship. One key reaches all of them: no tiers, no surcharge.
Billing and balance
How is usage metered?
1,000⚡ = $1 of official-price usage. Models are priced the same as the official APIs — no markup, no inflated baseline. Every unit of usage you spend here costs what it would cost buying direct.
The bonus comes when you top up instead: the more you add, the more we give, and it never expires. Nothing to reverse-engineer, nothing hidden in the meter.
How much does a top-up add?
Four tiers — the more you top up, the more we add:
- $5 — 1:1, credits 5,000⚡
- $50 — 20% extra, credits 60,000⚡
- $100 — 30% extra, credits 130,000⚡
- $500 — 50% extra, credits 750,000⚡
The formula is credited⚡ = USD × 1,000 × (1 + bonus). Custom amounts round down to the tier they clear: $200 lands on the $100 tier at +30%. Minimum $5, maximum $500 per top-up — larger volumes go through our team.
Do bonus credits expire? What about the balance?
Neither expires. Paid and bonus credits land in the same balance and spend down as you call — nothing resets, nothing is voided, and there is no "use it today or lose it" rule.
Three lines to remember: the list price is the official price, the bonus never expires, the balance never expires.
Can I get a refund?
Yes. Within 14 days we refund the cash you paid, minus what you have already spent; bonus credits are voided along with the refund. Crypto payments are non-refundable.
Getting started
How do I get started?
Hit "Start free" in the top right, register, create a key, then follow the guide for the tool you use. Questions are welcome in the Telegram group.
Where can I find setup guides?
Choose the guide for your tool: Claude Code, Cursor, or the OpenAI SDK.
Referrals
How does the referral rebate work?
Two levels: 10% of what the people you invite spend, plus 2% of what their invitees spend — 12% in total. It is credited to your rebate pool in real time against actual spend, and the binding is for life.
The pool has two exits: withdraw it (from $50 up, 5% fee, settled T+7, paid in USDT), or convert it back to balance with 10% extra (10,000⚡ becomes 11,000⚡). And anyone who signs up through your link gets an extra 5% on their first top-up (once only; the same prices apply after that).