---
title: "Polar Framework adapters pass customer IP address to checkout: 2026-10-21 | Harbyn"
description: "Polar Framework adapters pass customer IP address to checkout, announced Oct 21, 2026."
canonical: "https://harbyn.com/changes/polar/2026-10-21-framework-adapters-pass-customer-ip-address-to-checkout"
last-updated: 2026-10-25
---

# Polar Framework adapters pass customer IP address to checkout

Markdown version of <https://harbyn.com/changes/polar/2026-10-21-framework-adapters-pass-customer-ip-address-to-checkout>.

Behavior change - Polar. info severity. In effect.

Framework adapters for Next.js, Nuxt, TanStack Start, and Better Auth now pass the customer’s IP address when creating a checkout, so customers see prices in their local currency.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [Polar](https://harbyn.com/vendors/polar.md) |
| Kind | Behavior change |
| Severity | info |
| Status | In effect |
| Announced | Oct 21, 2026 |
| Added to Harbyn | Oct 25, 2026 |
| Lead time | No dated deadline |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses Polar, from its packages and API hosts. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://polar.sh/docs/changelog/recent> (changelog, fetched 2026-10-21 14:31 UTC, sha256 `045e94aebb801c60ab1279bf230ca3e62b6b5ba896da711e598257882974fc6c`)

## Related changes

### Changes at other vendors

- [Amazon Selling Partner API: ORDER\_CHANGE notifications add PreFulfillmentStatusChange for Amazon Autos](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-3.md) (effective Oct 28, 2026)
- [BigCommerce: 301 redirects will apply only to storefront channels](https://harbyn.com/changes/bigcommerce/2026-10-07-301-redirects-now-apply-to-storefront-channels-only.md) (effective Nov 10, 2026)
- [GitHub: Secret scanning audit log business field changes to enterprise slug](https://harbyn.com/changes/github/2026-10-20-updates-to-github-secret-scanning-7.md) (effective Nov 12, 2026)
- [Jira / Atlassian Cloud: New IP address ranges in use from January 1, 2027](https://harbyn.com/changes/atlassian-jira/2026-10-16-atlassian-cloud-adds-new-ip-address-ranges.md) (effective Jan 1, 2027)

[All upcoming deadlines](https://harbyn.com/deadlines.md)