A swap API lets you offer exchanges inside your own product — a wallet, a Telegram bot, a casino cashier — without running an exchange yourself. The provider handles liquidity, pricing and payouts; you bring the users. The hard part is picking a provider you won't regret.
What to actually compare
- Own liquidity or a middleman. Some APIs settle from their own reserves; others route your order to a third venue, which is an extra dependency and an extra thing that can break.
- No-KYC for your users. Does the flow force them through identity checks, or can they swap privately?
- Signed everything. Requests signed with HMAC and status webhooks that are signed too. For anything touching money, that's the floor, not a bonus.
- Server-side pricing. Quotes and payout amounts computed on the provider's side, never trusted from the client.
- Coverage, including privacy coins like Monero.
- How you get paid: a cut of the fee, your own markup, or both.
The usual names
You'll come across FixedFloat, ChangeNOW, SimpleSwap, SideShift and 0trace, among others. The real differences come down to two questions: do they run their own liquidity or route to someone else's, and how private is the flow for the person actually swapping. Read each provider's current docs — limits and contracts move around.
Where 0trace lands
- Own liquidity across every asset and network we support, so payouts are direct with no third party in the middle.
- No-KYC for your users, same as the main site.
- Requests signed with HMAC-SHA256 and a replay-protected nonce; signed webhooks for order.status_changed and partner.paid_out.
- Rates re-quoted on our side when the order is created, so you never depend on a client-side price.
- Bitcoin, Monero, Ethereum, BSC, Solana, Tron, Litecoin, Dash and the major stablecoins.
What integrating looks like
- Request access and get a key. It's invite-only, with no self-serve KYC gate.
- Pull the catalogue and a live quote, then create an order with a signed request.
- Show your user the deposit details and follow the signed webhooks as the order moves.
- Reconcile against the webhook payload. The status is fixed when the event is queued, so you don't miss a step.
How you make money
Two options, and you can run both. Take a share of our fee by sending traffic with your referral link — the visitor still sees our real rate. Or integrate through the API and add your own markup on top, shown in your interface. Either way the API itself is free; you earn on volume, not a subscription.
