1. Connect & sign in

Pzero uses Sign-In With Ethereum (SIWE) for your account, funding, and key management. Inference itself uses a separate Bearer key (created later).

Steps

1. Open the app and click Connect wallet. Pzero runs on Base (chain ID 8453): switch networks if prompted.
2. A sign-in prompt appears. Sign the SIWE message with your wallet.
3. You now have a session (an HttpOnly cookie). Your wallet address is your account.

One session, two roles

The same wallet can be a buyer and a seller. A single sign-in covers both your Buy and Sell actions.

What sign-in unlocks

• Funding your account via x402.
• Setting your max price.
• Creating and revoking API keys.
• Viewing your usage, savings, and history.

Headless / agents

Agents can sign in programmatically: request a nonce, build and sign the EIP-4361 message, then verify. See Authentication for the exact flow.

Next

• 2. Top up with USDC