BA
Better Auth•7d ago
Troy

Polar not working

I tried polar subscriptions but when i do checkout i get this error 
2025-03-05T18:05:39.702Z ERROR [Better Auth]: Polar checkout creation failed. Error: Invalid URL
 ⨯ [Error [APIError]: Checkout creation failed] {
  status: 'INTERNAL_SERVER_ERROR',
  body: [Object],
  headers: {},
  statusCode: 500,
  digest: '2697661159'
}
2025-03-05T18:05:39.702Z ERROR [Better Auth]: Polar checkout creation failed. Error: Invalid URL
 ⨯ [Error [APIError]: Checkout creation failed] {
  status: 'INTERNAL_SERVER_ERROR',
  body: [Object],
  headers: {},
  statusCode: 500,
  digest: '2697661159'
}
but i think the polar developers have not integrated headers cause when i add headers are not being passed 
export const checkout = async () => {
    await auth.api.polarCheckout({
        query: {
            productId: "6a77ff44-8349-436a-a46b-483cc3ba9f64",
        },
        params: {
            slug: "pro",
        },
        headers: await headers(),
    });
};
export const checkout = async () => {
    await auth.api.polarCheckout({
        query: {
            productId: "6a77ff44-8349-436a-a46b-483cc3ba9f64",
        },
        params: {
            slug: "pro",
        },
        headers: await headers(),
    });
};
9 Replies
dD0K
dD0K•7d ago
you can just redirect to "url"/api/auth/checkout/"slug" if you have the item properly set it up in your auth.ts
Troy
TroyOP•7d ago
Nice but how can i check current user subscription state also can help
dD0K
dD0K•7d ago
they're all listed in "url"/api/auth/subscriptions/list this is assuming you have the better auth catch all route under /api/auth/[...all]/route.ts btw the polar docs for this are pretty decent
dD0K
dD0K•7d ago
https://docs.polar.sh/integrate/sdk/adapters/better-auth
Polar
BetterAuth - Polar
Payments and Checkouts made dead simple with BetterAuth
Troy
TroyOP•6d ago
yeah with new latest version they have fixed it thanks mate
David
David•6d ago
@Troy so your : 
export const checkout = async () => {
    await auth.api.polarCheckout({
        query: {
            productId: "6a77ff44-8349-436a-a46b-483cc3ba9f64",
        },
        params: {
            slug: "pro",
        },
        headers: await headers(),
    });
};
export const checkout = async () => {
    await auth.api.polarCheckout({
        query: {
            productId: "6a77ff44-8349-436a-a46b-483cc3ba9f64",
        },
        params: {
            slug: "pro",
        },
        headers: await headers(),
    });
};
works now ?
Troy
TroyOP•6d ago
no i changed the implementation now am redirecting user to checkout url by specifying the product slug 
`/api/auth/checkout/pro`
`/api/auth/checkout/pro`
and for the portal i use this url also 
`/api/auth/portal`
`/api/auth/portal`
but make sure your products are here 
polar({
  ...,
  enableCustomerPortal: true,
  checkout: {
    enabled: true,
    products: [
      {
        productId: "1234",
        slug: "basic",
      },
      {
        productId: "1234",
        slug: "pro",
      },
    ],
    successUrl: "/dashboard/settings/billing?status=success&checkout_id={CHECKOUT_ID}",
  },
});
polar({
  ...,
  enableCustomerPortal: true,
  checkout: {
    enabled: true,
    products: [
      {
        productId: "1234",
        slug: "basic",
      },
      {
        productId: "1234",
        slug: "pro",
      },
    ],
    successUrl: "/dashboard/settings/billing?status=success&checkout_id={CHECKOUT_ID}",
  },
});
David
David•6d ago
Alright, so you're using the automatically generated route for checkout and portal, created by the Polar plugin.
Troy
TroyOP•6d ago
Yes

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