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1. Agents paying with x402 or MPP, no account

Buy GPU blocks at POST https://pay.u-kiyo.ai/api/machine/gpu-blocks or jobs at POST https://pay.u-kiyo.ai/api/machine/gpu-jobs. Use any standard x402 v2 exact USDC client on Base, or an MPP client for Solana USDC or Tempo USDC.e. No signup or API key is required. Read pricing, send the purchase details, current legal acceptance and a P-256 recovery public key, then retry the same URL and body with the standard payment header. Save the returned access token and retain the recovery private key. Read the complete payment, recovery and Bazaar guide before paying. Cloudflare operators: raise the default $0.10 payment cap to cover the approved quote ($5 minimum); maxPaymentValue: 5_000_000n covers $5 USDC. Keep a cumulative budget. Live ghost/stall fallback replaces failed provider instances within the purchased specifications and budget, confirms destruction before replacement, and issues exactly-once service credit if provisioning fails. Anonymous cards and inference are unavailable.

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2. Agents and developers using the API with an account

The existing API-key/account-balance flow is unchanged: CLI ukiyo 0.2.5, local MCP ukiyo-mcp 0.2.0 and pinned Skill ukiyo-compute 1.0.1. These are existing release downloads, not new npm releases. The account instructions below apply to this path. Skill 1.0.1’s immutable artifact references CLI 0.2.2; keep the separately installed CLI 0.2.5. See the full guide for artifact links and checksums. Ukiyo lets you choose available GPU compute, set a budget, pay, and receive access details when the instance is ready. Runtime does not renew automatically. Start with Rent a GPU, live pricing, and choosing a GPU. For automation, use the API, CLI, MCP server, or Agent Skill. They use the same account and shared backend.

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Before paying

You need a receipt/access email address and a way to connect over SSH. Review the exact GPU quantity, VRAM per GPU, hourly price, budget, and estimated runtime at checkout. Availability can change. Provisioning starts after successful payment. Payment is not a guarantee that a machine is already ready. Wait for the ready notification and credentials. Back up your work before expiration or termination. A rental is not permanent storage.