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This example shows how to perform the same flow using raw HTTP requests with cURL. This is useful for testing or for languages without an official SDK.

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1. Create Customer

// app/api/customers/route.ts
import { NextResponse } from "next/server";

export async function POST(request: Request) {
  const body = await request.json();
  const res = await fetch(
    "https://giant-goldfish-922.convex.site/api/customers",
    {
      method: "POST",
      headers: {
        Authorization: `Bearer ${process.env.CREDIBILL_SECRET_KEY}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(body),
    }
  );
  return NextResponse.json(await res.json(), { status: res.status });
}
Response: 
{
  "id": "cus_12345",
  "email": "[email protected]",
  "name": "Startup Inc",
  "created": 1678900000
}

​
2. Create Subscription

Take the id from the previous response (e.g., cus_12345) and use it to create a subscription. 
// app/api/subscriptions/route.ts
import { NextResponse } from "next/server";

export async function POST(request: Request) {
  const body = await request.json();
  const res = await fetch(
    "https://giant-goldfish-922.convex.site/api/subscriptions",
    {
      method: "POST",
      headers: {
        Authorization: `Bearer ${process.env.CREDIBILL_SECRET_KEY}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(body),
    }
  );
  return NextResponse.json(await res.json(), { status: res.status });
}
Response: 
{
  "id": "sub_67890",
  "status": "active",
  "current_period_end": 1681578400,
  "customer": "cus_12345",
  "plan": {
    "id": "plan_starter_monthly",
    "amount": 2900
  }
}