Live — OpenAI · Anthropic · Gemini · Mistral

The exchange
for AI credits
you own.

Buy unused API tokens from sellers at below-market rates. Sell yours when you're done. Peer-to-peer, instant, and transparent.

Browse marketplaceSell your credits
No lock-in  ·  Instant API keys  ·  Cancel anytime
$2.4M
Credits traded
12K+
Active users
30%
Avg. savings vs. retail
Supported providers
OpenAI
Anthropic
Gemini
Mistral
+ more soon
Why Attium

Credits you bought.
Money you didn't lose.

Overspent on API credits? Need a different provider's tokens? Attium connects buyers and sellers in one no-fluff exchange.

Instant API keys
Buy credits and get a working key in seconds. Drop it into your app — same format as the original provider.
Cheaper than retail
Seller-set pricing drives competition. Often 10–30% below what you'd pay directly to the provider.
Zero key exposure
Sellers' real keys are AES-256 encrypted and never shared. Buyers get platform-issued proxy keys.
Auto failover
If a seller's key goes down, your request silently reroutes to the next healthy key. Zero downtime.
Live usage tracking
Buyers see every token consumed per key. Sellers see revenue per listing. Full transparency, real-time.
Swap your credits
Have Anthropic but need OpenAI? Sell yours, use the balance to buy exactly what you need.
How it works

Simple on both sides.

As a seller
1
Connect your API key
Paste your key, choose a provider, set how many credits to list. We validate it live on submission.
2
Set your price
Use our platform rate or set your own price per million tokens. Pause or adjust anytime.
3
Earn as buyers use it
Revenue accumulates in your wallet as tokens are consumed. Withdraw to bank or PayPal.
As a buyer
1
Browse the exchange
See available credits by provider, price tier, and availability. Compare platform and seller-set rates.
2
Buy with card or balance
Pay via credit card or your Attium balance. Your API key is generated instantly on purchase.
3
Use it like any API key
Copy the key into your app. It works exactly like the real provider key — just cheaper.

Start swapping
today.

Join thousands of developers already saving on AI API costs.

Create free accountBrowse exchange