Frontier AI · Half the price
2×

Double your tokens. Same price.

Pay for 1, get up to 2.2×. The exact same frontier models — GPT-5.6, Claude Opus 4, O3-Pro — but every dollar you spend becomes more tokens. One key. Funded, capped, ready in seconds.

Start with $5 →
💎 Whale deal: fund $50 and receive $110 of API — a 2.2× / 54% off official. Spend $100, get $220. The bigger the pack, the bigger the bonus.
POWERED BY
Pick credit
Fund it. Get up to 2.2×.
One key = one model, funded & hard-capped. Step 1 pick amount, step 2 pick category, step 3 pick the exact model. Crypto only — USDT / BTC / ETH.
1 · How much do you want to fund?
$5
→ 1.75× tokens
starter
$10
→ 1.9× tokens
popular
$30
→ 2× tokens
most popular
$50
→ 2.2× tokens
whale
$100
→ 2.2× tokens
whale+
2 · What kind of model?
3 · Pick the exact model
How it works
3 steps. Seconds.
1

Pay crypto

Send USDT / BTC / ETH for the plan you picked.

2

Get your key

We mint a fresh, isolated key funded to 2× your payment.

3

Use it anywhere

Plug base_url + api_key into any SDK, Cursor, or Claude Code.

Your key is capped & locked — by design

HARD CAP — can't overspend MODEL LOCK — catalog only LIVE METER — cx.tpkcur.click IP BIND — optional

Watch the balance anytime at cx.tpkcur.click. When it runs low, top up. Never pay for more than you use. Full detail on the How it works page.

What builders say
Real users. Real doubles.
"Switched my whole agent stack to Dopp. Same Claude Opus 4, literally half my bill. The key capped itself exactly where I funded it — zero surprise."
@neon_runner · indie dev
"I was burning $400/mo on GPT-5.5 Pro. On Dopp that's $200 and I got the same tokens. Set it up in 2 minutes with the base_url."
@cipher_ko · ML engineer
"The 2× isn't marketing fluff. I counted: $5 gave me 14M Fable tokens vs ~7M on the official API. Staying."
@ghost_in_shell · solo founder
Independent reseller — not affiliated. DoppAPI is an independent reseller of API credits. We are not affiliated with, endorsed by, or officially partnered with OpenAI, Anthropic, Google, xAI, DeepSeek, Zhipu, Luma, or any AI model provider. Model names and logos are trademarks of their respective owners and are used only to describe API compatibility. API access is brokered through a third-party relay; service is "as is" with no warranty. The "2×" benefit is benchmarked against the standard provider rate and subject to the relay's live pricing. Payments are in cryptocurrency and final. See Terms of Service.