Digi-Key Authentication: OAuth 2.0 Guide (2026)

Authentication overview

Digi-Key's API solutions provide programmatic access to their extensive catalog, pricing, and availability data, along with order management capabilities. To ensure secure and authorized access, the Digi-Key API relies on the OAuth 2.0 authorization framework. This industry-standard protocol allows applications to obtain limited access to user accounts on an HTTP service, such as Digi-Key's, without ever exposing the user's credentials directly to the application itself. Instead, the application exchanges client credentials for an access token, which then authorizes subsequent API requests.

Implementing OAuth 2.0 involves several steps, including registering your application to obtain client credentials, initiating an authorization request (for certain flows), exchanging an authorization grant for an access token, and then using that access token to authenticate your API calls. The specific OAuth 2.0 flow you implement will depend on your application type and the level of user interaction involved. Digi-Key provides comprehensive developer documentation to guide you through this process effectively.

Understanding the different components of OAuth 2.0, such as client IDs, client secrets, authorization codes, access tokens, and refresh tokens, is crucial for building secure and scalable integrations with the Digi-Key API. Properly managing these credentials and tokens is fundamental to maintaining the security and integrity of your application and user data.

Supported authentication methods

Digi-Key primarily supports OAuth 2.0 for API authentication. Within the OAuth 2.0 framework, specific grant types (also known as flows) are offered to accommodate different application architectures and security requirements. The main grant types relevant for Digi-Key API integration are:

• Client Credentials Grant: This flow is suitable for server-to-server applications where the client application acts on its own behalf, rather than on behalf of a specific user. It's often used for automated processes like inventory synchronization or price updates that don't require user interaction. The application exchanges its client ID and client secret directly for an access token.
• Authorization Code Grant: This is the most common and secure OAuth 2.0 flow for web applications. It involves redirecting the user to a Digi-Key login page to grant permission, after which an authorization code is returned to your application. Your application then exchanges this code (along with its client ID and client secret) for an access token. This keeps the client secret secure on the server side and prevents it from being exposed in the user's browser.

The choice of grant type depends on whether your application interacts with a user's account directly or operates as a backend service. Digi-Key's API solutions documentation provides guidance on selecting the appropriate flow for your integration.

Authentication Methods Table

Getting your credentials

To begin integrating with the Digi-Key API, you must first register your application to obtain the necessary OAuth 2.0 credentials. This typically involves accessing the Digi-Key Developer Portal.

1. Create a Developer Account: If you don't already have one, sign up for a developer account on the Digi-Key Developer Portal. This account will be linked to your API applications.
2. Register a New Application: Within the developer portal, you will find an option to register a new application. During this process, you will typically provide details such as your application's name, a description, and crucially, one or more Redirect URIs (for flows like Authorization Code Grant). The Redirect URI is where Digi-Key will send the authorization code after a user grants permission.
3. Receive Client ID and Client Secret: Upon successful application registration, the developer portal will provide you with a unique Client ID and a Client Secret. The Client ID is a public identifier for your application, while the Client Secret is a confidential credential that must be kept secure. Treat your Client Secret like a password; never embed it directly in client-side code or expose it in public repositories.
4. Configure Scopes (if applicable): Depending on the API functionality your application requires, you may also need to specify access scopes during registration or when requesting an access token. Scopes define the specific permissions your application is requesting (e.g., read product data, manage orders).

The Digi-Key Developer Portal serves as your central hub for managing all your API applications, viewing usage statistics, and regenerating credentials if necessary. Refer to the official Digi-Key API documentation for the most current and detailed instructions on credential setup.

Authenticated request example

Once you have obtained an OAuth 2.0 access token, you will include it in the Authorization header of your HTTP requests to the Digi-Key API. The access token is typically a Bearer token, meaning the scheme Bearer is used.

Assuming you have successfully completed an OAuth 2.0 flow (e.g., Client Credentials Grant) and received an access_token, here's an example of how you might use it to make an API call to retrieve product information using cURL:

curl -X GET \
  'https://api.digikey.com/Search/v3/Products?keywords=Arduino Uno' \
  -H 'accept: application/json' \
  -H 'Authorization: Bearer YOUR_ACCESS_TOKEN' \
  -H 'X-DigiKey-Client-Id: YOUR_CLIENT_ID'

In this example:

• YOUR_ACCESS_TOKEN must be replaced with the actual access token you received.
• YOUR_CLIENT_ID refers to the Client ID you obtained when registering your application. While the Client ID is often included in the token exchange, some APIs may require it as a separate header for correlation or rate limiting purposes. Consult the Digi-Key API reference for exact header requirements.
• The accept: application/json header indicates that your application prefers a JSON response.

For programmatic examples in various languages like C#, Python, Java, and Node.js, refer to the Digi-Key API documentation, which provides comprehensive code snippets and SDKs to simplify integration.

Security best practices

Adhering to security best practices is paramount when integrating with the Digi-Key API to protect your application, user data, and credentials. The following guidelines are essential:

• Safeguard Client Secrets: Your OAuth 2.0 Client Secret is highly sensitive. Never hardcode it into client-side code (e.g., JavaScript in a browser), embed it in mobile applications where it can be decompiled, or commit it directly to public source code repositories. Store client secrets in secure environment variables, secret management services (like AWS Secrets Manager or Azure Key Vault), or encrypted configuration files.
• Use HTTPS/TLS for All Communications: Always ensure that all communication with the Digi-Key API and your authorization server (for token exchange) occurs over HTTPS (TLS). This encrypts data in transit, preventing eavesdropping and tampering. Digi-Key APIs are only accessible over HTTPS.
• Validate Redirect URIs: For Authorization Code flows, ensure that your registered Redirect URIs are precise and securely controlled. Only allow redirects to URIs that your application explicitly owns and manages. Broad wildcard Redirect URIs can create security vulnerabilities.
• Handle Access Tokens Securely: Access tokens typically have a limited lifespan. Store them securely in memory for the duration of their validity, or in a secure, encrypted cache if persistence is required across application restarts. Do not store access tokens in browser local storage or session storage, as they are vulnerable to XSS attacks.
• Implement Refresh Tokens (if applicable): If Digi-Key provides refresh tokens, use them to obtain new access tokens without requiring the user to re-authenticate. Store refresh tokens with the highest level of security, as they have a longer lifespan and can be used to mint new access tokens.
• Implement Error Handling and Logging: Implement robust error handling for authentication failures. Log authentication attempts and failures, but be careful not to log sensitive information like client secrets or full access tokens. Monitor logs for unusual activity that might indicate a compromise.
• Follow Principle of Least Privilege: Request only the necessary API scopes for your application's functionality. Do not request broad access if your application only needs specific permissions. This minimizes the impact if an access token is compromised.
• Regularly Rotate Credentials: Periodically rotate your Client Secrets. The Digi-Key Developer Portal should offer functionality to generate new client secrets and revoke old ones. This practice reduces the risk associated with long-lived credentials.
• Stay Updated: Keep your application's dependencies, libraries, and frameworks up to date to patch known security vulnerabilities. Monitor Digi-Key's developer announcements for any security updates or changes to their authentication protocols.