# Adds support for retrieving thin events

## What’s new

You can now [retrieve thin Event](https://docs.stripe.com/api/v2/core/events/retrieve.md?api-version=2024-09-30.acacia) objects for each notification from the `/v2/core/events` endpoint.

Thin events are lightweight events you can access through the [API v2](https://docs.stripe.com/api-v2-overview.md?api-version=2024-09-30.acacia) API. Thin events have a more granular permissions model and their payloads contain no API-versioned data. This makes it easier to update integrations that receive events and are built with a well-typed Stripe SDK. Thin Event objects include a `data` property that can include additional information about the event.

The [Meters API](https://docs.stripe.com/api/billing/meter.md?api-version=2024-09-30.acacia) is the first API to use thin events. Currently, you can only retrieve the following [Events v2](https://docs.stripe.com/api/v2/events.md?api-version=2024-09-30.acacia) related to [usage-based billing](https://docs.stripe.com/billing/subscriptions/usage-based.md):

- [v1.billing.meter.error_report_triggered](https://docs.stripe.com/api/v2/core/events/event-types.md?api-version=2024-09-30.acacia#v2_types_events-v1.billing.meter.error_report_triggered)
- [v1.billing.meter.no_meter_found](https://docs.stripe.com/api/v2/core/events/event-types.md?api-version=2024-09-30.acacia#v2_types_events-v1.billing.meter.no_meter_found)

Here’s an example of an `v1.billing.meter.error_report_triggered` event. The `related_object` field includes the `id` of the object, but doesn’t include the object record itself.

```json
{
  "id": "evt_test_65R9Ijk8dKEYZcXeRWn16R9A7j1FSQ3w3TGDPLLGSM4CW0",
  "object": "v2.core.event",
  "type": "v1.billing.meter.error_report_triggered",
  "livemode": false,
  "created": "2024-09-17T06:20:52.246Z",
  "related_object": {
    "id": "mtr_test_61R9IeP0SgKbYROOx41PEAQhH0qO23oW",
    "type": "billing.meter",
    "url": "/v1/billing/meters/mtr_test_61R9IeP0SgKbYROOx41PEAQhH0qO23oW"
  }
}
```

Learn more about [events](https://docs.stripe.com/event-destinations.md#events-overview).

## Impact

Thin events have several benefits. They make it easier to maintain future webhook integrations because the payloads are unversioned. You can send thin events to [event destinations](https://docs.stripe.com/event-destinations.md). Thin events are fully typed in the SDKs for API v2. Finally, if your application needs a corresponding API object related to an event (for example, the [Meter](https://docs.stripe.com/api/billing/meter/retrieve.md?api-version=2024-09-30.acacia)), you must call the Stripe API for the object’s latest state. This helps prevent application errors caused by outdated object data (for example, race conditions). The SDKs for API v2 contain helper methods that allow you to retrieve records associated with an event.

## Changes

#### REST API

#### Ruby

#### Python

#### PHP

#### Java

#### Node.js

#### Go

This change does not affect the Go SDK.

#### .NET

## Upgrade

#### REST API

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. If you use an SDK, upgrade to the corresponding SDK version for this API version.
   - If you don’t use an SDK, update your [API requests](https://docs.stripe.com/api/versioning.md) to include `Stripe-Version: 2024-09-30.acacia`
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).

#### Ruby

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. Upgrade your Ruby SDK to [v13.0.0](https://github.com/stripe/stripe-ruby/releases/tag/v13.0.0)
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).

#### Python

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. Upgrade your Python SDK to [v11.0.0](https://github.com/stripe/stripe-python/releases/tag/v11.0.0)
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).

#### PHP

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. Upgrade your PHP SDK to [v16.0.0](https://github.com/stripe/stripe-php/releases/tag/v16.0.0)
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).

#### Java

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. Upgrade your Java SDK to [v27.0.0](https://github.com/stripe/stripe-java/releases/tag/v27.0.0)
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).

#### Node.js

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. Upgrade your Node SDK to [v17.0.0](https://github.com/stripe/stripe-node/releases/tag/v17.0.0)
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).

#### Go

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. Upgrade your Go SDK to [v80.0.0](https://github.com/stripe/stripe-go/releases/tag/v80.0.0)
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).

#### .NET

1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench.
1. Upgrade your .NET SDK to [v46.0.0](https://github.com/stripe/stripe-dotnet/releases/tag/v46.0.0)
1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md).
1. [Test your integration](https://docs.stripe.com/testing.md) against the new version.
1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md).
1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours.

Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).