Autlantic.Billing 0.1.0

<p align="center"> <img src="https://autlantic.com/brand/autlantic-icon-1024-master.png" alt="Autlantic" width="96" height="96" /> </p>

<h1 align="center">Autlantic Billing — .NET</h1>

<p align="center"> <strong>USDC payments on Base</strong><br /> Official server client for the hosted Autlantic Billing API. </p>

<p align="center"> <a href="https://docs.autlantic.com/api/dotnet"><img src="https://img.shields.io/badge/docs-docs.autlantic.com-5672cd?style=flat-square" alt="Docs" /></a> <a href="https://github.com/Autlantic/payments-sdk/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-MIT-blue?style=flat-square" alt="MIT License" /></a> <a href="https://autlantic.com"><img src="https://img.shields.io/badge/product-autlantic.com-111827?style=flat-square" alt="Autlantic" /></a> </p>

Why this SDK

Same Billing API as Node — create subscriptions, one-time payments, and shareable payment links; verify webhooks. Non-custodial USDC on Base settles to your merchant payoutAddressEvm. API keys and webhook secrets stay on the server.

Install

Package: Autlantic.Billing 0.1.0 (NuGet when published).

Until NuGet is published, reference the project from this repo:

<ItemGroup>
  <ProjectReference Include="..\..\sdks\dotnet\src\Autlantic.Billing\Autlantic.Billing.csproj" />
</ItemGroup>

Or pack locally:

cd sdks/dotnet && dotnet pack -c Release

Requires .NET 8+.

Quick start

using Autlantic.Billing;
using System.Text.Json.Nodes;

var billing = AutlanticBilling.FromEnv(); // AUTLANTIC_BILLING_API_KEY

JsonObject link = billing.CreatePaymentLink(new Dictionary<string, object?>
{
    ["amountUsdc"] = 42,
    ["merchantRefPrefix"] = "invoice",
    ["successUrl"] = "myapp://billing/success",
    ["cancelUrl"] = "myapp://billing/cancel",
});
// Share link["url"] or open it with a mobile Checkout SDK

Webhooks

Verify x-autlantic-signature with your portal endpoint secret:

bool ok = Webhook.Verify(secret, rawBody, signatureHeader);
JsonObject? evt = Webhook.ParseEvent(rawBody);
// Unlock on invoice.paid / payment.paid / subscription.activated

Environment

Hosted mode only. Pins Autlantic-Version: 2026-01-01.

Documentation

Develop

dotnet test

License

MIT · Operated by Autlantic Limited (UK company no. 17422039).

Part of Autlantic Payments SDK.