Deprecation

Deprecation policy

Arcus gives developers at least 12 months notice before removing any endpoint, field, or behavior. The deprecation lifecycle has three stages:

Stage	Action
Announced	Listed in the changelog + deprecation table below; `Deprecation` response header added
Sunset	`Sunset` response header added with the removal date
Removed	Feature removed; requests to removed endpoints return `410 Gone`

Response headers

When you call a deprecated endpoint or use a deprecated parameter, the response includes:

Deprecation: true
Sunset: Sat, 01 May 2027 00:00:00 GMT
Link: <https://arcuserp.mintlify.app/concepts/deprecation#migration-guides>; rel="deprecation"

Set up alerting in your HTTP client to watch for these headers so deprecations surface before they become incidents.

Detecting deprecation headers

const response = await arcus.orders.list();

if (response.headers?.deprecation) {
  console.warn('WARNING: This endpoint is deprecated. Sunset:', response.headers?.sunset);
}

response = arcus.orders.list()

if 'deprecation' in response.raw_response.headers:
    import warnings
    warnings.warn(
        f"Deprecated endpoint. Sunset: {response.raw_response.headers.get('sunset')}",
        DeprecationWarning,
    )

resp, err := client.Orders.ListRaw(ctx, nil)
if resp.Header.Get("Deprecation") != "" {
    log.Printf("WARNING: deprecated endpoint. Sunset: %s", resp.Header.Get("Sunset"))
}

Current deprecations

No active deprecations. This table will be updated when the first deprecated feature is announced.

Feature	Deprecated	Sunset	Replacement
(none)

Migration guides

When a significant deprecation is announced, a migration guide will be added to the Guides section with step-by-step instructions for updating your integration.

Questions?

If a deprecation would break your integration and the timeline is too short, contact support via the in-app Help button with your use case. Arcus may be able to provide an extended sunset window for documented migration blockers.

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Deprecation policy

Response headers

Detecting deprecation headers

Current deprecations

Migration guides

Questions?

​Deprecation policy

​Response headers

​Detecting deprecation headers

​Current deprecations

​Migration guides

​Questions?

Deprecation policy

Response headers

Detecting deprecation headers

Current deprecations

Migration guides

Questions?