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FAQ

What do I need for KYB onboarding?

KYB — know your business — is the verification halfin runs at onboarding to establish who your business is, who controls it, and that it is permitted to collect and send funds before any real money moves through your account. It is a process, not a certificate halfin issues on your behalf and not a setting you toggle in the API. The honest answer to "what do I need?" is that the depth of what is asked depends on your business, your structure, and the jurisdictions you operate in — the onboarding conversation is where those specifics are settled. What you can count on: you do not need KYB finished to start building, and you do need it finished before a live key can settle a real deposit or release a real payout.

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halfin FAQ — how crypto payments work end to endHow halfin invoicing, checkout, deposit addresses, payouts, conversion, and webhooks work. Browse every question or read the cross-cutting answers.Are API keys scoped?Yes. A halfin API key carries only the permissions you grant it, scoped to the operations it needs — a read or invoice key cannot release payouts.Are API requests rate limited?Yes. Public auth endpoints are rate limited per IP and authenticated API-key requests are limited too. Design clients to back off and retry idempotently.Are crypto payments final?Yes — a confirmed on-chain transfer is irreversible and there are no chargebacks. Finality is a property of the chain, which is what makes reconciliation clean.Are there chargebacks with crypto payments?No. A confirmed on-chain payment is final, so there are no card-style forced reversals. A refund is a deliberate action you choose to issue.Are there monthly or setup fees?halfin's commercial pricing is not published on this site yet, so there is no monthly or setup figure to quote here. Building in the sandbox is free.Assets and networks questionsFrequently asked questions drawn from the halfin assets and networks pages. Each one links to a standalone answer.Can a customer pay an invoice late?A deposit that lands after a halfin invoice expires fires invoice.late_deposit — the funds are credited and matched to the invoice, and you decide how to treat the order.Can a customer reuse the same deposit address?Yes. A halfin static deposit address is persistent, so repeat deposits to the same address credit the same customer — no new invoice or address per top-up.Can I auto-convert incoming payments to a stablecoin?Yes. halfin balance conversion can run automatically toward a target asset such as a stablecoin, so incoming payments settle in one currency on credit.Can I bill in fiat and get paid in crypto?Yes. Set amount_fiat and fiat_currency on a halfin invoice; the customer pays the equivalent in any supported asset at the locked rate you bill against.Can I build while onboarding is pending?Yes — build against a sandbox key first. The sandbox is the same API as production with test data, and your full integration is verified before going live.