Skip to content

api-management-howto-ca-certificates.md

Latest commit

 

History

History
76 lines (45 loc) · 4.25 KB

api-management-howto-ca-certificates.md

File metadata and controls

76 lines (45 loc) · 4.25 KB
title Add a Custom CA Certificate - API Management | Microsoft Docs
description Learn how to add a custom CA certificate in Azure API Management. Also learn how to delete a certificate.
services api-management
author dlepow
ms.service azure-api-management
ms.topic how-to
ms.date 02/17/2026
ms.author danlep
ms.custom
sfi-image-nochange

How to add a custom CA certificate in Azure API Management

APPLIES TO: Developer | Basic | Standard | Premium

Azure API Management allows you to upload and install CA certificates on the machine inside the trusted root and intermediate certificate stores. Use this functionality if your services require a custom CA certificate.

This article shows how to manage CA certificates of an API Management instance in the Azure portal. For example, if you use self-signed client certificates, you can upload custom trusted root certificates to API Management.

[!INCLUDE api-management-ca-certificate-v2-tiers]

CA certificates uploaded to API Management can be used for certificate validation only by the managed API Management gateway. If you use the self-hosted gateway, you can learn how to create a custom CA for self-hosted gateway later in this article.

[!INCLUDE api-management-workspace-availability]

[!INCLUDE api-management-service-update-behavior]

[!INCLUDE updated-for-az]

Upload a CA certificate

Complete the following steps to upload a new CA certificate. If you haven't created an API Management instance yet, see Create an API Management service instance.

  1. Go to your Azure API Management instance in the Azure portal.

  2. In the left menu, under Security, select Certificates. On the Certificates page, select CA certificates > + Add.

  3. In the Upload CA certificate window, select the file icon and browse for the certificate .cer file. In the Store box, select a certificate store. Only the public key is needed, so the password is optional.

    :::image type="content" source="media/api-management-howto-ca-certificates/02.png" alt-text="Screenshot that shows the steps for adding a CA certificate in the Azure portal." lightbox="media/api-management-howto-ca-certificates/02.png":::

  4. Select the Add button at the bottom of the window, and then select Save. This operation might take a few minutes.

Note

You can also upload a CA certificate by using the New-AzApiManagementSystemCertificate PowerShell command.

Delete a CA certificate

Select the certificate, and then select Delete in the ... menu.

Create custom CA for a self-hosted gateway

If you use a self-hosted gateway, validation of server and client certificates via CA root certificates uploaded to API Management service isn't supported. To establish trust, configure a specific client certificate so that it's trusted by the gateway as a custom certificate authority.

Use the Gateway Certificate Authority REST APIs to create and manage custom CAs for a self-hosted gateway. To create a custom CA:

  1. Add a certificate .pfx file to your API Management instance.
  2. Use the Gateway Certificate Authority - Create Or Update REST API to associate the certificate with the self-managed gateway.

Limits

API Management currently enforces a limit of 10 CA certificates per instance.

Related content