Sitecore Search API Key Authorization Becomes Mandatory
In This Article
What You Need to Do Before October 15
If your application uses Sitecore Search and Recommendation APIs or the Events API, there is an important authentication change coming soon.
Starting October 15, 2026, Sitecore will require requests to these APIs in the US and APSE2 regions to include a valid API key or access token in the Authorization header.
This change is currently scheduled and has not yet been released. However, teams should review their integrations now rather than waiting until the deadline.
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What is changing?
At the moment, some Sitecore Search and Events API requests in the US and APSE2 regions may work without authorization.
That will change on October 15.
From that date onward, requests to the affected endpoints must contain valid authorization credentials. Requests that do not include the required credentials, or contain invalid credentials, will be rejected with:
HTTP 401 Unauthorized
Authorization is already required for the EUC1 region, so teams operating across multiple Sitecore regions may already be familiar with this requirement.
Prevent Sitecore Search API Failures Before October 15
Who needs to take action?
This change is particularly important for teams that have built custom integrations with Sitecore Search.
You should review your applications if they:
- Make direct calls to Sitecore Search and Recommendation APIs
- Send data through the Sitecore Events API
- Use custom frontend or backend integrations
- Have server-side services that communicate with Sitecore Search
- Use scripts, scheduled jobs, or other automated processes to call these APIs
- Were originally configured without an Authorization header
Even if everything is working normally today, an unauthenticated integration could start returning 401 errors after October 15.
What should you do?
The most important step is to audit your existing API integrations.
Check the code and configuration for every application that communicates with Sitecore Search or the Events API. Make sure requests include a valid API key or access token in the Authorization header.
For example, an API request should include an authorization header similar to:
Authorization: Bearer <your-api-key-or-access-token>
The exact authentication setup will depend on your Sitecore environment and integration.
Don't wait until October 15
Authentication changes can sometimes expose integrations that are easy to overlook.
For example, your main application may already be authenticated while an older scheduled job, development tool, or custom integration is still making unauthenticated requests.
A good approach is to review all environments, including:
- Development
- Testing or staging
- Production
- Background services and scheduled jobs
- Third-party or custom applications
It is also worth checking your deployment and configuration management process. If API credentials are stored in environment variables, secrets managers, or configuration files, make sure the required credentials will be available wherever the API calls are executed.
What happens if you do nothing?
After October 15, 2026, unauthenticated requests to the affected Sitecore Search and Events API endpoints in the US and APSE2 regions will be rejected.
In practical terms, this could result in failed API calls, missing event data, broken search-related functionality, or errors in applications that depend on those requests.
The change does not necessarily mean your Sitecore implementation will break completely. The impact depends on which APIs your application uses and whether those requests are currently authenticated.
Need Help Preparing Sitecore Search APIs for Authorization?
A simple checklist for developers
Before the deadline, make sure you can answer "yes" to the following:
- [Control] Have we identified every application calling the Sitecore Search APIs?
- [Control] Have we identified every Events API integration?
- [Control] Do all affected requests include an Authorization header?
- [Control] Are the API keys or access tokens valid?
- [Control] Are credentials configured correctly in every environment?
- [Control] Have we tested authenticated requests successfully?
- [Control] Have we checked background jobs and less obvious integrations?
- [Control] Have we deployed the required changes before October 15?
Final thoughts
The upcoming Sitecore authentication change is straightforward, but it is something development teams should address before it becomes an outage.
If your Sitecore Search or Events API integrations already use API keys or access tokens correctly, you may not need to make any changes. If you have older or unauthenticated integrations, now is the right time to update them.
Sitecore provides additional guidance in its API authentication and authorization documentation, which should be the primary reference when updating your implementation.
The key date to remember is October 15, 2026. After that date, unauthenticated requests in the US and APSE2 regions will receive HTTP 401 Unauthorized responses.
A quick authentication audit today can help prevent unexpected API failures later.
Frequently Asked Questions
When does Sitecore Search API authorization become mandatory?
Starting October 15, 2026, affected Sitecore Search and Recommendation API and Events API requests in the US and APSE2 regions must include valid authorization credentials.
What happens if a Sitecore Search API request has no authorization after October 15, 2026?
Unauthenticated requests to affected endpoints in the US and APSE2 regions will be rejected with an HTTP 401 Unauthorized response.
Which Sitecore Search APIs are affected by the authorization change?
The change affects Sitecore Search and Recommendation APIs and the Events API in the US and APSE2 regions where authorization is not already required.
Which Sitecore Search regions are affected?
The scheduled authorization requirement applies to affected APIs in the US and APSE2 regions. Authorization is already required in the EUC1 region.
What should developers do before October 15, 2026?
Developers should audit all Sitecore Search and Events API integrations and verify that affected requests include valid API keys or access tokens in the Authorization header.
How should I authenticate Sitecore Search API requests?
Affected Sitecore Search API requests should include a valid API key or access token in the Authorization header, using the authentication method appropriate for the application and API.
Why might Sitecore Search APIs return HTTP 401 after October 15?
An HTTP 401 Unauthorized response can occur when an affected API request does not contain the required Authorization credentials or when the supplied credentials are invalid.
Do existing Sitecore Search integrations need to be updated?
Integrations that already send valid authorization credentials may not require changes. Older or unauthenticated integrations should be reviewed and updated before October 15, 2026.
What Sitecore Search integrations should be included in an authentication audit?
The audit should include frontend and backend applications, scheduled jobs, background services, scripts, development tools, third-party integrations, and any other application that communicates with the affected APIs.
How can I prevent Sitecore Search API authorization failures?
Identify every affected API integration, verify the Authorization header and credentials, check configuration across development, staging, and production, test authenticated requests, and deploy required changes before October 15, 2026.
