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An agent can train a model with nothing but a wallet. There is no signup and no prepaid balance: you ask for a run, receive an HTTP 402 with the exact price, pay it, and follow the run with a claim token.

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Before you pay: a dataset you own

The wallet that pays must own an approved dataset. Two ways to get one, also with no account:
  • Generate it over x402: POST /datasets/x402/synth, see Datasets for agents. Then approve it with a wallet-signed POST /training/datasets/:id/approve.
  • Upload your own: wallet-signed POST /training/datasets/presign, PUT the JSONL, then wallet-signed POST /training/datasets/:id/approve.

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1. Read the catalog

No authentication. Returns the base models, the GPUs with their hourly training price, the networks you can pay on, and the limits.

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2. Ask for a quote

The response is a 402 with an x402 accepts entry for the exact amount, and a singularity block you can read without knowing our pricing:
Sign the quote request with owner_wallet. The quote is bound to that wallet, so it must prove control: send the wallet-signature headers (X-Auth-Address, X-Auth-Chain, X-Auth-Signature, X-Auth-Timestamp, X-Auth-Nonce, the same scheme as the rest of the compute API) or an API key that belongs to that wallet. No account is needed for a wallet signature. owner_wallet must be the wallet that owns the dataset and the wallet that pays. The request is checked before the 402 (dataset approved and owned, GPU in stock, block within the limits) and checked again before the payment settles. Pick a block long enough for your data: POST /training/estimate suggests one, and a run that runs out of time stops at the end of its block. A quote is not a reservation: the daily limit and GPU stock are confirmed when you pay, and a GPU can still fail to start (you then get credits, see below). A quote is valid for 10 minutes.

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3. Pay

Send the same body plus quote_id, with your signed payment in X-Payment (no auth headers needed: the payment identifies the payer). The signed amount must equal maxAmountRequired exactly. On Base and Robinhood Chain (EIP-3009), validBefore must be within maxTimeoutSeconds (one hour) of now. On Solana the payment is a signed SPL transfer transaction, which expires with its recent blockhash. Standard x402 signers already do all of this.
run_id is present once the run exists. While payment is being confirmed or the GPU is starting it can be absent: poll status_url with the claim token.
Keep the claim_token. It is shown once and is the only credential the status URL accepts.

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4. Follow the run

The state field tells you where it is: The same run is also readable with a wallet-signed GET /training/runs/:run_id, and the results with POST /training/runs/:run_id/deploy.

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What happens to your money

  • The price is the quote. What you sign is exactly what you are charged.
  • One payment, at most one run. Resubmitting the same payment never charges again; it returns the same order outcome (pending, starting, the run, or credits).
  • If the outcome is unclear, you get 409 settlement_pending with your claim token. Do not pay again; poll the status URL.
  • If the GPU cannot start, the payment becomes credits on the paying wallet’s account (credited_not_started). Once refund is returned or not_charged, start a run with them using a wallet-signed POST /training/runs. Nothing is refunded on-chain.
  • A prepaid block: finishing early or cancelling does not refund the rest.

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Limits

Up to $500 per order, 3 paid runs per wallet per 24 hours. Networks: Base (USDC), Solana (USDC) and Robinhood Chain (USDG); the catalog lists what is live. Auto-tune and resume are not sold over x402 yet; use the API with credits for those.