Rust SDK

sumup-rs is the official crate published as sumup. It covers all public APIs, supports async/await, and exposes helpers for card-present and e-commerce workflows.

Installation

Install the crate with cargo add sumup (enable the jiff feature if you prefer alternative datetime handling).

Configure Authentication

Set the SUMUP_API_KEY environment variable (or provide an OAuth token) and pass it to Client::builder().with_api_key. You can also inject the key directly:

let client = Client::builder()
    .with_api_key("sup_sk_MvxmLOl0...")
    .build()?;

Examples

Online Payment Checkout

use sumup::{resources::checkouts::CheckoutCreateRequest, Client, Currency};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::builder()
        .with_api_key(std::env::var("SUMUP_API_KEY")?)
        .build()?;

    let checkout = client
        .checkouts()
        .create(Some(CheckoutCreateRequest {
            merchant_code: std::env::var("SUMUP_MERCHANT_CODE")?,
            amount: 25.00,
            checkout_reference: "ORDER-1001".into(),
            currency: Currency::EUR,
            description: Some("Online payment via card widget".into()),
            customer_id: None,
            purpose: None,
            id: None,
            status: None,
            date: None,
            valid_until: None,
            transactions: None,
            redirect_url: None,
            return_url: None,
        }))
        .await?;

    println!("{}", checkout.id.unwrap_or_default());
    // Return checkout ID to your webpage so the SumUp card widget can complete the payment.
    Ok(())
}

Solo Cloud API Checkout

use std::{
    io::{Error, ErrorKind},
    time::{SystemTime, UNIX_EPOCH},
};

use sumup::{
    resources::readers::CreateReaderCheckoutRequestAffiliate,
    Client, CreateReaderCheckoutRequest, Money,
};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::builder()
        .with_api_key(std::env::var("SUMUP_API_KEY")?)
        .build()?;

    let merchant_code = std::env::var("SUMUP_MERCHANT_CODE")?;
    let readers = client.readers().list(&merchant_code).await?;
    let solo = readers
        .items
        .into_iter()
        .find(|reader| reader.device.model == "solo")
        .ok_or_else(|| Error::new(ErrorKind::NotFound, "Pair a Solo reader before using the Cloud API."))?;

    let checkout = client
        .readers()
        .create_checkout(
            &merchant_code,
            &solo.id,
            CreateReaderCheckoutRequest {
                total_amount: Money {
                    currency: "EUR".into(),
                    minor_unit: 2,
                    value: 1_500,
                },
                affiliate: None,
                card_type: None,
                description: None,
                installments: None,
                return_url: None,
                tip_rates: None,
                tip_timeout: None,
            },
        )
        .await?;

    println!("{}", checkout.data.client_transaction_id);
    Ok(())
}