> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zbdpay.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sending instant Bitcoin payments on Vercel

> Learn how to send Bitcoin using Vercel Edge Functions.

## Prerequisites

To complete this guide, you will need the following:

* [ZBD Project with a Live API key](/get-started/api-keys)
* [Vercel account](https://vercel.com/signup) + [Vercel CLI installed](https://vercel.com/docs/cli#installing-vercel-cli)

## 1. Create a Next.js Project

Follow the prompts on the create-next-app CLI to create a new project, and then change into the directory of your project.

```bash theme={null}
yarn create next-app <project-name>
```

```bash theme={null}
cd <project-name>
```

## 2. Write an Edge Function

<Note>For this guide we will be making use of the [App Router](https://nextjs.org/docs/app/building-your-application/routing/route-handlers) inside of Next.js.</Note>

Create a new file in the `app/api/send/route.ts` that makes a payment to a [Lightning Address](/payments/glossary#lightning-address) (e.g. [andre@zbd.gg](mailto:andre@zbd.gg)) with the following code:

<CodeGroup>
  ```javascript app/api/send/route.ts theme={null}
  import { NextResponse } from 'next/server';

  export const runtime = 'edge';
  export const dynamic = 'force-dynamic';

  const ZBD_BASE_URL = 'https://api.zbdpay.com';
  const ZBD_API_KEY = 'b7YW3s2JzZKGcXjIf5Dqof8wjKT2RuWr8';

  export async function GET() {
    const res = await fetch(`${ZBD_BASE_URL}/v0/ln-address/send-payment`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'apikey': `${ZBD_API_KEY}`,
      },
      body: JSON.stringify({
        lnAddress: 'andre@zbd.gg', // Who is the recipient of the payment?
        amount: '100000', // 100 satoshis (100,000 msats) -- ~$0.03
        comment: 'Money at internet speed', // What is this payment for?
      }),
    });

    if (res.ok) {
      const data = await res.json();
      return NextResponse.json(data);
    }
  }
  ```
</CodeGroup>

## 3. Send payment locally

<Warning>
  In order to successfully send payments through the API, you must have an active balance in the ZBD Project you are using. [Learn more about depositing funds into a ZBD Project wallet](/get-started/add-funds).

  If you do not have funds in the ZBD Project you are using, you will receive a 4xx error from the API.
</Warning>

Run function locally:

```bash theme={null}
npx next dev
```

Opening your browser to the following URL: `https://example.com/api/send` should return a JSON response with the payment sent message.

You can also test this using curl command:

```bash theme={null}
curl https://example.com/api/send
```

You're looking for the `status` of `completed` to know that the payment settled successfully.

<Info>Payments in the Lightning Network are asynchronous so you may see a response stating the payment is `processing`. This is expected -- use the `callbackUrl` property to receive updates about your payments.</Info>

## 4. Send payment in production

Deploy your project to Vercel:

```bash theme={null}
vercel
```

Opening your browser to the following URL: `https://project-name.vercel.app/api/send` should now return this in production.

You can also test this using curl command:

```bash theme={null}
curl https://project-name.vercel.app/api/send
```

## 5. Try it yourself

You can now begin sending instant Bitcoin payments on the edge with Vercel + ZBD!

<CardGroup cols={1}>
  <Card title="Vercel Edge Functions Example" icon="github" color="#000000" href="https://github.com/zebedeeio/zbd-vercel-edge-functions-example">
    See the full source code.
  </Card>
</CardGroup>