Build with the Relm API

Accounts, payouts, currency exchange, payroll and checkout payments, for your business and the customers you onboard. Every call goes through one signed API.

Set up authentication

Every request carries a signature made with your private key

POST /v1/accounts/:accountId/payout
Authorization: Signature keyId:base64_signature:timestamp
Content-Type: application/json

How request signing works

APIs and SDKs

Start with authentication, then go to the product you're building with.

• API Authentication

  Create API keys and sign each request with an ECDSA (secp256k1) signature. Every other API needs this.

  Create an API key Sign a request Fix signature errors
• Banking API

  Work with your own business accounts: currencies, beneficiaries, payouts, currency exchange and transaction history.

  Send a payout Get an exchange quote List transactions
• Partner API

  Create customers under your partner account, then run their banking and payroll for them.

  Onboard a customer Pay out for a client Run client payroll
• Payroll

  Pay many beneficiaries in different currencies from one source account, with fees shown up front and a quote to approve.

  Payroll API Payroll widget Estimate fees
• POS API

  Accept payments at checkout: create orders, look them up, and receive order events by webhook.

  Create an order Fetch orders Order events
• SDK Integration

  Embed Relm's onboarding flow and Sumsub KYC/KYB verification in your own app.

  Onboarding SDK Sumsub SDK