Which product do I need?

Both live under one base URL, one authentication scheme and one set of conventions — money as strings, idempotency, cursor pagination, the error envelope, webhook signing — so integrating both never feels like integrating twice. What differs is which resources you use and which kind of key you carry.

The wallet service

For a platform that keeps a balance per user: an exchange, a marketplace, a game, a broker. Every customer gets a permanent deposit address on every chain you enable; deposits credit their ledger balance; you pay out on request.

• Resources: /v1/customers, /v1/wallets, /v1/deposits, /v1/balances, /v1/payouts
• Key kinds: wallet for addresses and reads, payout for money out
• Start with the Quickstart

Hosted checkout

For a merchant who sells something and wants to be paid in crypto: an invoice with a price, a deadline and an address per chain, a hosted page the payer lands on, and invoice.paid when the money is final.

• Resources: /v1/invoices, /v1/billing
• Key kind: checkout — the key your storefront carries cannot move money out, whatever scopes it holds
• Create a payment link from the dashboard with Create and share an invoice, or integrate the Invoices API.

Both

A key's kind fences which routes it reaches, so an integration that does both holds two keys: a checkout key in the storefront and a wallet (and, when needed, payout) key on the backend. Keys are minted in the console, where the limit for each kind is displayed, and shown once. Authentication has the details.