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Platform questions
Every question below was authored on a platform page and now has its own answer page. Pick the one that matches what you are working on.
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Every question, one page each.
- Does halfin make custody guarantees?halfin's controls are signing (HMAC-signed webhooks you can authenticate), permissions (scoped API keys), and audit (a recorded trail of who created and…
- Does halfin sell crypto or convert fiat for my customers?No. There is no fiat on-ramp. halfin accepts the crypto a customer already holds and settles it against the fiat amount you billed; it does not sell…
- Does the locked rate affect what I pay?The rate lock is about exchange-rate certainty, not fees. When a fiat-anchored invoice activates, halfin freezes the conversion rate and pins the payable…
- How do I get a quote for my business?Talk to the team. Pricing is sized to how you transact, so bring your rough monthly volume, the chains and assets your customers use, and whether you lean…
- How does halfin stop a payment from being credited and then reversed?Crediting waits for confirmations to reach a per-chain threshold and is reorg-aware: if a chain reorganization unwinds a transaction halfin was tracking…
- How much does halfin cost?halfin's commercial pricing is not published on this site yet, so there is no fee figure to quote here. We deliberately avoid putting percentages or…
- Is halfin a regulated or licensed payment provider?halfin makes no regulatory or licensing claim. Compliance such as know-your-business onboarding, anti-money-laundering awareness, and travel-rule handling…
- Is the network fee the same as a halfin fee?No — they are completely separate layers. A network fee (gas on Ethereum and EVM chains, a miner fee on Bitcoin, a ledger fee on XRP) is charged by the…
- Is there a sandbox, and how do I get test keys?Yes. Sandbox access and test API keys come from the dashboard. You can create invoices, run them through their full lifecycle, and exercise your webhook…
- What can someone do with a leaked API key?Only what that key was scoped to do. halfin keys carry scoped permissions, so issuing each integration the narrowest key it needs bounds the blast radius…
- What is halfin, in one sentence?halfin is digital-asset payment infrastructure for online businesses — it lets you bill in your home currency, accept the crypto your customers hold, and…
- Where do I start as a developer?Get an API key from the dashboard, then create a fiat-anchored invoice over POST /api/v1/invoices with the X-API-Key header. Present it via hosted…
- Where do I start if I want to use halfin?Most integrations start with invoicing, since it turns an amount you bill in fiat into a crypto payment with the rate locked at activation. From there you…
- Which webhook events does halfin send?Six: invoice.confirming, invoice.paid, invoice.underpaid, invoice.overpaid, invoice.expired, and payout.completed. Build your handler as a switch over the…
- Who is halfin for?Online businesses with a cross-border payment problem: companies whose customers, suppliers, or partners sit on the other side of a slow or unreliable…
- Why is there no price list on this page?Because publishing a number we might revise is worse than publishing none. halfin's pricing model is still being finalized, and any percentage here would…