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FAQ

Can lines in a run use different currencies?

Yes. Because a mass payout is a fan-out of independent single payouts, each line sets its own currency. One run can pay one recipient in USDT on Tron, the next in USDC on Base, and another in ETH — there is nothing run-wide that forces every line onto the same asset. Each call to POST /api/v1/payouts carries its own currency, amount, destination, and idempotency_key, so a mixed-currency run is just a loop over lines that happen to name different currency codes.

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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.How do I send many payouts at once?Fan out over POST /api/v1/payouts — one call per recipient, each with its own currency, amount, destination, and idempotency_key. There is no batch endpoint.How do I track a payout run?There is no batch object to poll. Each line is its own payout with its own status and payout.completed / payout.failed webhooks — you aggregate run progress on your side.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.