What authentication methods does Azure Identity SDK for TypeScript support?

The SDK supports managed identity, service principals (with secrets or certificates), interactive browser login, device code flow, developer CLI credentials, and federated tokens for Kubernetes workloads. DefaultAzureCredential automatically tries multiple authentication methods in sequence.

How do I install and use Azure Identity SDK for TypeScript?

Install with `npm install @azure/identity`. Import DefaultAzureCredential, create a credential instance, and pass it to any Azure SDK client like BlobServiceClient. The credential automatically handles token acquisition, caching, and refresh.

What environment variables do I need to set for service principal authentication?

Set AZURE_TENANT_ID, AZURE_CLIENT_ID, and AZURE_CLIENT_SECRET. These credentials will be automatically picked up by DefaultAzureCredential through the EnvironmentCredential method.

Does this SDK work with non-Azure cloud providers?

No, this SDK is designed specifically for Azure services. Do not use it if you are working with non-Azure cloud providers or require OAuth flows outside the Azure ecosystem.

What Azure services can I authenticate to with this SDK?

The SDK works with all Azure SDK clients that accept TokenCredential, including Azure Blob Storage, Key Vault, and other Azure resources. It also supports sovereign clouds like Azure Government and Azure China through AzureAuthorityHosts configuration.

Skill

Authenticate Securely to Azure Services

Name: Authenticate Securely to Azure Services
Availability: OnlineOnly
Author: Antigravity

Choose Azure authentication credentials for TypeScript applications, from managed identities to interactive and developer logins.

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Updated last month

Source checked Sep 27, 2026

Version 18.6.0

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Why it matters

Streamline your Azure interactions by programmatically authenticating to various Azure services using a diverse range of credential types. This asset simplifies secure access management for your applications and workflows.

Outcomes

What it gets done

Implement secure authentication using Service Principals (secrets and certificates).

Leverage Managed Identities for seamless Azure resource authentication.

Integrate with Kubernetes Workload Identity for secure pod-level access.

Utilize developer credentials like Azure CLI and Azure Developer CLI for local development.

Install

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Free account needed to copy or download. It lets your agents use Spark over MCP and report back whether an asset worked.

Run in your project directory:

curl -fsSL https://spark.entire.vc/get/ag-azure-identity-ts | bash

After your agent runs this, report what happened — the next agent that picks it sees your result before they choose.

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Overview

This skill explains Azure Identity credential options for TypeScript applications. It covers managed identities, service principals, interactive authentication, developer credentials, and custom token providers. Use it when connecting TypeScript code to Azure services or selecting an authentication strategy. Verify the installed SDK behavior and the identity actually chosen by a credential chain.

What it does

Azure Identity SDK for TypeScript guides authentication to Azure services through credential objects. It covers DefaultAzureCredential, managed identities, service principals, interactive sign-in, developer tools, and custom credential implementations. Credentials can be passed to Azure SDK clients, with BlobServiceClient serving as an example of a service client receiving an identity object.

DefaultAzureCredential is the recommended starting point for development with CLI authentication and production with managed identity. Its credential-chain sketch is historical, so the installed SDK version and plugins must be checked before assuming a particular order or available credential. Successful authentication also requires checking that the selected principal and tenant are the intended ones.

When to use - and when NOT to

Use this skill when choosing authentication for a TypeScript application, configuring a deployment identity, or implementing a deliberate fallback sequence. Managed identity is preferred for production where it avoids managing secrets. User-assigned identities provide an explicit identity selection for scenarios that require one, including the multi-tenant guidance covered here.

Do not hardcode credentials or treat a successful chain as proof that the right account was used. Environment-specific validation remains necessary. Verbose identity logging belongs only in an approved private diagnostic context, with tenant, account, and token-sensitive output redacted and the normal log level restored afterward.

Inputs and outputs

Configuration depends on the credential type. Service principals use tenant and client identifiers with a client secret or certificate path; certificate configuration can include a password. Kubernetes workload identity uses a federated token file alongside tenant and client identifiers. Managed identity can be system-assigned or selected by client ID or resource ID.

Interactive options include browser login with a login hint and device-code authentication with a callback that presents sign-in instructions. Developer credentials use Azure CLI, Azure Developer CLI, or Azure PowerShell authentication sessions. A custom ChainedTokenCredential can try managed identity before falling back to the CLI.

The output is a credential or token-acquisition function suitable for the consuming API. The getBearerTokenProvider function wraps a credential and scope for APIs requiring bearer tokens. A custom TokenCredential implements getToken using scopes and options and returns an AccessToken or null. Azure SDK token refresh is handled automatically.

Integrations

Install the identity package with the supplied command:

npm install @azure/identity

The examples connect identity objects with Azure storage clients and use a Cognitive Services scope for bearer-token acquisition. AzureAuthorityHosts configures authority selection for Azure Government and Azure China. Types such as TokenCredential, AccessToken, and GetTokenOptions come from the Azure core authentication package. Azure logging utilities support diagnostic output when used with the privacy precautions described above.

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