Glossary

Words we use in Agents docs.

Terms

API key: Bearer credential pzero_… for inference and agent self-service. Session cookies are rejected on those routes.

Chat completion: Text inference via POST /v1/chat/completions (buffered JSON or SSE). Image and video use their own routes.

Balance: Confirmed USDC available to settle inference. Pending top-ups are not spendable until chain confirmation.

Auth: Bearer pzero_… on inference, POST /v1/x402/refill, and /v1/agent/*. Session cookies are rejected on those routes. Browser Privy sign-in mints the same key type; agents use signup instead.

Max price: Your clearing ceiling (maxPriceCentsPerDollar, 30–80). The router only clears offers at or below it. New accounts default to 49. A stale ceiling → 503 no_eligible_supply, not an empty balance.

Modality: Text (chat), image, or video. Each has its own inference page under this tab.

x402: HTTP 402 payment flow; EIP-3009 exact scheme on Base USDC for signup and refill. Funds prepaid balance. Inference never pays per request with x402.

Agent: A programmatic client that signs up, refills, and calls inference without a browser.