One wallet.
Every model.
Paid per answer.
Point your wallet at Spectra402. One payment unlocks every model behind an OpenAI-compatible API — you only pay for the tokens in the answer you actually get. No signup, no subscription, no card.
TBA 
No subscriptions. Only answers.
No plans, no credit packs, no seats. Every call is billed for the tokens it actually used, at the price on the tag.
Send, price, sign, answer
Send a request, get a price, sign it, get your answer. No key, no account, no gas.
Deposit once, use anywhere
Deposit once and get a spectra_sk_ key that works in any OpenAI SDK. Every call spends exactly its token cost.
Repeated calls cost less
Byte-identical deterministic calls are answered from cache at a lower price, because agent loops repeat themselves more than you'd think.
Unused credit returns
Pay-per-call signs a ceiling. What the call didn't use is credited back to your wallet, instead of being kept.
Your key, in seconds.
Generate a key right here on the site, copy it, and use it in any OpenAI client pointed at Spectra402.
Your key:
Click Generate to create a key…
Keys are generated by the live API at /v1/api-keys. In this build they work in demo mode — any key starting with chromax_ is accepted, and no key is also accepted.
Live in the router
Prices in USDG per 1M tokens. Example prices for the demo — not live quotes.
A large open model with tool use and vision support, built for agent work.
A flagship agent coding model with a very long context window.
DeepSeek's strongest open model in this catalog.
A 120B mixture-of-experts model with 12B active parameters, built for agents.
A fast, small open model for everyday agent tasks.
A larger open model for harder reasoning and coding.
A strong multilingual open model for agents.
A balanced open model with multimodal support.
$SPEC: pay less, hold less risk.
The router token gives qualifying holders a discount on calls, read from the chain at call time. Inference itself is always paid in the settlement currency — you never need the token just to use the router.
Discount: 20%
Qualifying holding: 1,000,000 $SPEC in the wallet that owns your key.
Contract address: TBA
Read the contract before the chart.
Launchpads mint thousands of tokens every day. Scan reads a contract straight from the chain — supply, owner, upgrade hooks, mint, blacklist and fee switches, then pool depth and recent flow — and summarises what it found in three sentences.
Enter an address to see a scan summary.
Drop-in code, no new SDK.
Bring a wallet, not an email
There are no accounts. The wallet that pays is the owner, and the key is the account.
Deposit, mint a key
Fund a prepaid spectra_sk_ key. It is shown once.
Swap one URL
Point any OpenAI client at Spectra402. Or skip the key and let your agent pay each call with x402.
from openai import OpenAI
client = OpenAI(
base_url="https://spectrx402.fun/v1",
api_key="spectra_sk_your_key",
)
reply = client.chat.completions.create(
model="spectra/llama-3.1-8b",
messages=[{"role": "user", "content": "What is Spectra402?"}],
)
print(reply.choices[0].message.content)
Billing is exact: tokens used × posted rate. No per-call fee, nothing recurring, nothing hidden.