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FAQ

Can I auto-convert incoming payments to a stablecoin?

Yes. Balance conversion can run automatically toward an asset you choose, and a stablecoin is the most common target. You nominate a settlement asset once; from then on, incoming payments are converted toward it at the moment they are credited, so your held balance stays denominated in one currency instead of accumulating whatever your customers happened to pay with. The point is exposure: BTC, ETH, and SOL move; a USD-denominated stablecoin like USDC or USDT doesn't, so settling into one keeps the value you accepted from drifting before you act on it.

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Keep reading across the cluster.

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.Balance conversion and treasury rebalancingConvert held balances and rebalance treasury without leaving halfinAre 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 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.