Outpay Merchant Onboarding: Store and Payout Wallet Setup

Create an Outpay merchant store, register a wallet, prove wallet ownership, and prepare to receive direct USDC settlement on Base.

Who this is for

Anyone creating a new Outpay merchant account for the first time.

Before you begin

Your store's name and, optionally, a short description.
An EVM wallet you control on Base, and the ability to sign a message with it (either a browser wallet extension, or a manually pasted signature).

Create your store

Open the Outpay Dashboard and create your account.

Enter the store name and optional description.

Enter the EVM wallet address you control for Base payments.

Sign the wallet-ownership challenge. Outpay validates the address format, its checksum, the signature, and the timestamp before accepting it.

Review the store details and finish onboarding.

Verify before accepting payments

Confirm the wallet address character-by-character against your treasury records. Customers send funds directly to this address — a wrong wallet is not something Outpay can delay or reverse.

Expected result

Your store is created, and your payout wallet is registered and verified. You can now create checkouts and payment links from the Dashboard.

Common problems

Problem	Likely cause	Next step
Wallet signature is rejected	The signature was signed more than a few minutes after the challenge was issued, or with the wrong wallet.	Regenerate the challenge and sign it promptly with the exact wallet you entered.
Onboarding cannot be completed	Required store or wallet fields are missing or invalid.	Confirm the wallet address matches the required format and try again.

You can update the payout wallet later from Settings. That path requires a fresh ownership signature and should be treated as a high-impact access event — see payout wallet.

Payout wallet — change your registered wallet later.
Dashboard overview — what to do next after onboarding.
Merchant security — protecting wallet changes and key access.