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FAQ

How much does it cost to start?

You can start building without spending anything. Contact the team at thehalfin.com/contact to begin onboarding — once your account is set up you receive a sandbox API key that runs the entire integration on simulated data, no real funds move, so there is nothing to pay while you develop. The cost question that actually matters is what live transactions cost once real money flows, and that is set during onboarding and shown in the dashboard rather than quoted on a marketing page. So the practical answer is two-part: free to build and prove out the integration, and a pricing conversation for going live.

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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.Can I test before going live?Yes. Use a sandbox test API key from the halfin dashboard to run the full invoice, payout, and webhook lifecycle on test data, then swap to a live key.What do I need for KYB onboarding?KYB verifies your business before real funds move on halfin. What it establishes, why it runs in parallel with your build, and where the specifics are settled.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.