How do I add billing to my Astro app?

Install the Commet SDK, add your API key, and start billing. Follow the [Astro integration guide](/docs/integrate-with-astro) for a step-by-step walkthrough with code examples.

Commet

Add billing with
Astro

Start billing for free Read docs

Built for Astro

Billing that fits your stack

Astro API routes handle billing server-side while your content stays static. Hybrid rendering lets you add billing to specific pages without slowing down the rest.

src/pages/api/subscribe.ts

import type { APIRoute } from "astro";
import { commet } from "../../lib/commet";

export const POST: APIRoute = async ({ request }) => {
  const { email, customerId } = await request.json();

  await commet.customers.create({ email, id: customerId });

  const sub = await commet.subscriptions.create({
    customerId,
    planCode: "pro",
  });

  return new Response(JSON.stringify({
    checkoutUrl: sub.data.checkoutUrl,
  }));
};

import type { APIRoute } from "astro";
import { commet } from "../../lib/commet";

export const POST: APIRoute = async ({ request }) => {
  const { email, customerId } = await request.json();

  await commet.customers.create({ email, id: customerId });

  const sub = await commet.subscriptions.create({
    customerId,
    planCode: "pro",
  });

  return new Response(JSON.stringify({
    checkoutUrl: sub.data.checkoutUrl,
  }));
};

Get started

Install in seconds

Add billing to your Astro app with the Commet SDK. API routes for subscriptions, usage tracking, and checkout.

Get started Documentation

Terminal

npm install @commet/node

npm install @commet/node

Frequently Asked Questions

Install the Commet SDK, add your API key, and start billing. Follow the Astro integration guide for a step-by-step walkthrough with code examples.

Commet supports metered (pay for what you use), credits (block when exhausted), balance (spend across features), seats (per-user pricing), and boolean (feature gating). Learn more in the consumption models guide.

Yes. Call the usage tracking method whenever a billable event happens. Commet aggregates usage and bills it at the end of each billing period. Works for API calls, AI tokens, storage, or any custom metric. See the usage tracking guide for details.

Yes. Commet has a built-in AI model catalog with per-token pricing. You can track input, output, and cache tokens with configurable margins. See the AI token billing guide for setup instructions.

Yes. Commet is a Merchant of Record that handles taxes, compliance, refunds, and payouts. Stripe Tax is integrated for automatic tax calculation. Read more about the Merchant of Record model.

Commet has no setup fees and no monthly minimums. You only pay 4.5% + $0.40 per successful transaction. You can start building and testing for free using the sandbox environment. See pricing for details.

Start billing in minutes

No setup fees. No monthly minimums. 4.5% + $0.40 per successful transaction.

Start billing for free

import type { APIRoute } from "astro";

import { commet } from "../../lib/commet";

export const POST: APIRoute = async ({ request }) => {

const { email, customerId } = await request.json();

await commet.customers.create({ email, id: customerId });

const sub = await commet.subscriptions.create({

customerId,

planCode: "pro",

});

return new Response(JSON.stringify({

checkoutUrl: sub.data.checkoutUrl,

}));

};

import type { APIRoute } from "astro";

import { commet } from "../../lib/commet";

export const POST: APIRoute = async ({ request }) => {

const { email, customerId } = await request.json();

await commet.customers.create({ email, id: customerId });

const sub = await commet.subscriptions.create({

customerId,

planCode: "pro",

});

return new Response(JSON.stringify({

checkoutUrl: sub.data.checkoutUrl,

}));

};

Add billing withAstro

Billing that fits your stack

Install in seconds

Frequently Asked Questions

Start billing in minutes

Add billing withAstro

Billing that fits your stack

Install in seconds

Frequently Asked Questions

Start billing in minutes

Add billing with
Astro

Add billing with
Astro