Claude Opus 4.8
anthropic
Input price
$2.9400 / 1M tokens
Output price
$14.7000 / 1M tokens
Live · Multi-model gateway
Claude
Claude
One API for Claude, GPT & Gemini
Access the most powerful AI models through a single OpenAI / Anthropic-compatible endpoint. Pay only for what you use, top up with USDT or PayPal.
Claude / GPT / Gemini
One key reaches multiple model families without separate provider accounts.
USDT / PayPal
Prepaid balance, no overseas credit card, no automatic subscription charge.
OpenAI / Anthropic
Compatible with common SDKs by changing only base URL and API key.
Start in minutes
Register, top up, create an API key, and call your first model.
Current offers
Stackable; live rates are shown on the top-up page.
Quick answer
Access the most powerful AI models through a single OpenAI / Anthropic-compatible endpoint. Pay only for what you use, top up with USDT or PayPal.
Who it fits / who it does not fit
Good fit
Developers, freelancers and startups that need no-card payments, multi-model access, OpenAI-compatible routing and prepaid USDT/PayPal balance.
Not a fit
If you must use only direct official provider accounts, enterprise private contracts or zero third-party gateway, work directly with model providers.
0+
Models available
0
Compatible protocols
0
Uptime %
0
ms median latency
Trusted by builders worldwide
Everything you need to ship with confidence
OpenAI & Anthropic compatible
No overseas card required
Instant API keys
HTTPS & hashed keys
Pay only for what you use
USDT & PayPal accepted
Try it live
Pick a model and run a simulated request — no signup needed.
Transparent pricing, every model
Hover a card to explore. Pay only for the tokens you use.
Claude Opus 4.8
Claude Sonnet 4.6
anthropic
Input price
$1.7640 / 1M tokens
Output price
$8.8200 / 1M tokens
Claude Haiku 4.5
anthropic
Input price
$0.0822 / 1M tokens
Output price
$0.4116 / 1M tokens
GPT-5.5
openai
Input price
$2.8500 / 1M tokens
Output price
$17.1000 / 1M tokens
GPT Image 2
openai
Input price
$4.5600 / 1M tokens
Output price
$17.1000 / 1M tokens
GPT-5.4
openai
Input price
$1.4250 / 1M tokens
Output price
$8.5500 / 1M tokens
Ready to connect multiple models with one key?
Claim trial credit, then test Claude, GPT or Gemini through an OpenAI-compatible endpoint.
Create a free accountWhy choose us
A single gateway that handles compatibility, billing and payments — so you can focus on building.
Drop-in compatible
Point your existing OpenAI or Anthropic SDK at our base URL — no code rewrite.
Pay as you go
No subscriptions. Top up your balance and spend it across any model.
Fast & reliable
Low-latency relay to upstream providers with usage metering.
Global payments
Top up with USDT (TRC20/ERC20/BEP20) or PayPal.
Loved by individual developers
Builders around the world ship faster with one API for Claude, GPT and Gemini.
I changed one base_url and my side project could call Claude, GPT and Gemini with the same key. Topping up with USDT meant I never needed an overseas card.
One balance, one usage log, three model families. It cut my billing headaches to zero and the OpenAI SDK just worked out of the box.
The $5 trial let me ship a prototype before spending real money. Pay-as-you-go pricing is perfect for hobby projects that scale up later.
Start in seconds
Compatible with OpenAI SDK · Anthropic SDK · cURL
Step 1 — Sign up & get free credit
Step 2 — Create an API key
Step 3 — Set your base URL
cURL
curl https://clauden.ai/v1/chat/completions \
-H "Authorization: Bearer $CLAUDEN_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-sonnet-4-6",
"messages": [{"role": "user", "content": "Hello!"}]
}'
Partner program
Turn your reach into recurring referral rewards
Share your invite link; when friends pay and use the API, you earn up to 40% across three generations on their verified spend, withdrawable in USDT (TRC20) after review.
G1 · 40%
G2 · 10%
G3 · 5%
Share link
Friends pay and use
Withdraw after review
Service referral rewards, based on verified spend; withdrawals are reviewed.
Growth Engine reserved
A full viral growth system can be enabled later
We are launching the safe A version now: share kits, partner page and strong referral entry points. The layout reserves room for the future C version: missions, leaderboards, tiers and creator analytics.
Mission wall
Leaderboard
Partner tiers
Creative tracking
Frequently asked questions
How do I get started?
Sign up, verify your email to receive free credit, create an API key, and point your SDK at our base URL.
How is billing calculated?
You are billed per token based on each model’s input and output price. Costs are deducted from your balance.
Which integrations are supported?
We are compatible with the OpenAI API (/v1) and the Anthropic API (/v1/anthropic). Use your existing SDKs.
How can I pay?
Top up with USDT (TRC20 / ERC20 / BEP20) or PayPal.
Is it secure?
API keys are stored hashed, requests are served over HTTPS, and your balance is verified server-side.
Ready when you are
Start building in minutes
One key for Claude, GPT and Gemini. Sign up now and get $5 in free credit — no card, no commitment.
No subscription · Cancel anytime · Top up with USDT or PayPal