Send instant Bitcoin rewards to your users' self-custody wallets. Grid handles the USD-to-BTC conversion, compliance, and delivery in one atomic operation.
Grid API
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Capabilities / Rewards
Summit Bank funds one BTC treasury. Every customer gets real bitcoin cashback, delivered instantly. Pan and zoom to explore.
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Technical specs
Overview
Distribute Bitcoin rewards to self-custody Spark wallets in seconds. Fund a platform account in USD, then trigger instant BTC delivery per user. Grid handles the conversion, compliance, and settlement in one call.
Delivery
Bitcoin delivered to self-custody wallets in seconds.
- DestinationSpark wallet (self-custody)
- SpeedInstant via Spark — seconds, not minutes
- Custody modelUser holds their own keys; no platform custody required
- Wallet provisioningGenerate via Privy, Spark SDK, or let users connect their own
- End-user KYCNot required — only the paying entity needs KYB
Funding
Pre-funded platform account with flexible deposit rails.
- ModelPre-funded — deposit USD, then distribute BTC on demand
- ACHPush from your bank; 1–2 business days to settle
- Wire transferSame-day settlement
- Lightning / SparkFund with USDB instantly via Spark wallet address
- Stablecoin depositUSDC on Solana and other supported chains
- Balance trackingWebhook on every balance change; query via /platform/internal-accounts
Quote mechanics
Lock the sending side or the receiving side — your choice.
- Lock sending (SENDING)Fix the USD amount; user receives whatever BTC it buys at the current rate
- Lock receiving (RECEIVING)Fix the satoshi amount; platform is debited the USD needed at the current rate
- Immediate executionSet immediatelyExecute: true to create and execute in one call — ideal for automated micro-payouts
- Two-step executionOmit immediatelyExecute to review the exchange rate and fees before confirming
- Quote expiryLocked quotes expire after ~5 minutes; execute before expiration or request a new quote
API
Quote, execute, webhook. Every rail.
- ProtocolREST, OpenAPI 3.1
- SDKsTypeScript, Kotlin
- AuthHTTP Basic (server-side), Passkeys / OIDC / Email OTP (end-user)
- Money movementQuote → execute → webhook. Same flow for every rail, every currency.
- SigningECDSA P-256, device-held keys, per-action payloadToSign
- IdempotencyIETF-spec Idempotency-Key on every mutation
- WebhooksSigned payloads, exponential retry, deduplicate by delivery ID
Integration
Timeline, ownership, and economics
- Time to launchWeeks
- BrandingYour brand and product surface
- EconomicsYield on balances, card interchange, FX margin, and transaction fees accrue to the platform
- ComplianceLightspark MSB, hosted KYC/KYB, or bring your own
- PricingCustom
