Accept crypto payments in .NET

Add non-custodial crypto checkout to your .NET app: create an invoice, send the buyer to the hosted checkout, and fulfill on a signed webhook. Funds settle straight to your own wallet, $0 platform fees.

Install

// uses HttpClient, no SDK needed

Create an invoice and redirect to checkout

var body = new StringContent(
    JsonSerializer.Serialize(new { amount_usd_cents = 5000, memo = "Order" }),
    Encoding.UTF8, "application/json");
http.DefaultRequestHeaders.Authorization = new("Bearer", Environment.GetEnvironmentVariable("SHIELDZ_API_KEY"));
var res = await http.PostAsync("https://shieldz.cash/api/v1/invoices", body);
// parse res into invoice, redirect to invoice.pay_url

Verify the webhook

// Verify the HMAC over "<t>.<rawBody>"
static bool Verify(string raw, string header, string secret) {
    var parts = header.Split(',');
    var t = parts.First(p => p.Trim().StartsWith("t=")).Trim()[2..];
    var v1 = parts.First(p => p.Trim().StartsWith("v1=")).Trim()[3..];
    using var h = new HMACSHA256(Encoding.UTF8.GetBytes(secret));
    var expected = Convert.ToHexString(h.ComputeHash(Encoding.UTF8.GetBytes(t + "." + raw))).ToLower();
    return v1 == expected;
}

Full reference: API docs, SDKs, API reference.

Explore Shieldz

Crypto payment gateway: overview, non-custodial, Zcash.

Accept a coin: Bitcoin, USDC, USDT, Zcash.

Compare: vs Coinbase Commerce, vs BTCPay Server, vs ZGo, vs CryptAPI, vs NOWPayments, vs Cryptomus, vs BitPay, vs CoinGate, vs OpenNode, vs Plisio, vs BlockBee, vs CoinPayments.

Use cases: For freelancers, For creators, For open-source projects, For online stores, For SaaS, For VPN & hosting providers, For agencies, For nonprofits, For digital sellers.

Guides: Node.js, FastAPI, .NET, WooCommerce.

Build: SDKs, API reference, quickstart. Learn: overview, blog, how it works, supported coins, pricing, is it safe, verify it yourself.