PostNord Authentication: API Keys & Security Practices (2026)

Authentication overview

PostNord APIs require authentication to ensure that only authorized applications can access and interact with their services. The primary method for authenticating requests to PostNord APIs involves the use of API keys. These keys serve as unique identifiers for your application and are used by the PostNord system to verify your identity and grant access to the requested resources. Proper management and secure handling of these API keys are critical for maintaining the integrity and security of your integrations.

Authentication is a foundational security measure for any API integration, preventing unauthorized access and ensuring that data exchanges are conducted securely. For PostNord, this also means controlling access to various logistics functionalities, from parcel tracking to service point location. The authentication process is designed to be developer-friendly while adhering to standard security practices for web-based APIs. All communication with PostNord APIs should occur over HTTPS to encrypt data in transit, protecting API keys and sensitive payload information from interception.

Supported authentication methods

PostNord primarily supports API key authentication for its various APIs, including the Delivery Tracking API, Delivery Checkout API, and Service Point Finder API. This method is suitable for server-to-server communication and applications where the API key can be securely stored and managed.

API Key Authentication

API keys are unique alphanumeric strings that identify a calling application or user. When making requests to PostNord APIs, your application includes this key, which the PostNord server then validates. Access to specific API endpoints and resources is determined by the permissions associated with the provided API key.

• How it works: The API key is typically passed in an HTTP header or as a query parameter with each API request. PostNord's developer documentation specifies the exact method for each API.
• Use cases: Ideal for backend services, server-side applications, and environments where the API key can be kept confidential and not exposed to client-side code or public repositories.

The table below summarizes the primary authentication method supported by PostNord:

While API keys are the primary method, it's important to note that other authentication schemes like OAuth 2.0 offer more granular control over delegated access and are often preferred for user-facing applications or third-party integrations requiring explicit user consent. For a general overview of these methods, the OAuth 2.0 framework documentation provides detailed insights into delegated authorization.

Getting your credentials

To access PostNord APIs, you must register on the PostNord Developer Portal and obtain an API key. This process involves creating an account, subscribing to the desired APIs, and then generating your unique key.

Step-by-step guide to obtaining an API key:

1. Register on the PostNord Developer Portal: Navigate to the PostNord Developer Portal and sign up for a new account. You will typically need to provide an email address and create a password.
2. Verify your account: After registration, you may receive an email to verify your account. Follow the instructions in the email to complete the verification process.
3. Log in to the Developer Portal: Once your account is active, log in to the portal using your credentials.
4. Subscribe to an API: Browse the available APIs (e.g., Delivery Tracking API, Delivery Checkout API) and select the ones you intend to use. You will typically need to subscribe to an API plan, which may include a free tier or a paid subscription as detailed on the PostNord pricing page.
5. Generate your API key: Within your developer dashboard or application settings, you will find an option to generate an API key for your subscribed APIs. Follow the prompts to create a new key. Some portals allow you to create multiple keys for different environments (e.g., development, staging, production) or applications.
6. Record your API key: Once generated, your API key will be displayed. It is crucial to copy this key immediately and store it securely, as it may not be retrievable again for security reasons. Treat it like a password.

PostNord offers a free tier for developers, which includes a certain number of requests per month (e.g., 500 requests/month for the tracking API). This allows developers to test and integrate the APIs before committing to a paid plan. Details on these tiers are available on the PostNord pricing page.

Authenticated request example

Once you have obtained your API key, you can include it in your API requests. The specific method for including the API key (e.g., as an HTTP header or query parameter) is detailed in the PostNord API reference for each endpoint. For many PostNord APIs, the key is passed via a custom HTTP header.

Example using curl (conceptual):

This example demonstrates a conceptual request to a PostNord tracking API endpoint, assuming the API key is passed in the X-API-KEY header. Always refer to the official PostNord API reference documentation for the exact header names and parameter requirements.

curl -X GET \
  'https://api.postnord.com/trackandtrace/v2/shipments?shipmentId=PN123456789SE' \
  -H 'Accept: application/json' \
  -H 'X-API-KEY: YOUR_POSTNORD_API_KEY'

In this example:

• https://api.postnord.com/trackandtrace/v2/shipments?shipmentId=PN123456789SE is the API endpoint being called, requesting tracking information for a specific shipment ID.
• -H 'Accept: application/json' specifies that the client prefers a JSON response.
• -H 'X-API-KEY: YOUR_POSTNORD_API_KEY' is the critical authentication header, where YOUR_POSTNORD_API_KEY must be replaced with your actual API key obtained from the PostNord Developer Portal.

Always consult the specific PostNord API documentation for the correct endpoint URLs, required parameters, and the exact header or query parameter name for the API key, as these can vary between different PostNord services.

Security best practices

Securing your API keys and ensuring the integrity of your PostNord integrations is paramount. Adhering to security best practices helps prevent unauthorized access and potential misuse of your API access.

API Key Management

1. Treat API keys as sensitive credentials: API keys should be handled with the same level of security as passwords or private keys. Do not embed them directly in client-side code, public repositories, or commit them to version control systems without proper encryption or exclusion.
2. Use environment variables: Store API keys in environment variables on your server or in secure configuration files that are not part of your codebase. This prevents them from being exposed in source code. For cloud environments, consider using secret management services (e.g., AWS Secrets Manager or Google Secret Manager).
3. Restrict API key permissions: If the PostNord Developer Portal offers granular control, generate API keys with the minimum necessary permissions required for your application to function. This limits the damage if a key is compromised.
4. Rotate API keys regularly: Periodically generate new API keys and revoke old ones. This practice reduces the window of opportunity for a compromised key to be exploited.
5. Monitor API usage: Keep an eye on your API usage patterns through the PostNord Developer Portal. Unusual spikes or activity could indicate a compromised key or unauthorized access.

Secure Communication

• Always use HTTPS/TLS: Ensure all communications with PostNord APIs are conducted over HTTPS (HTTP Secure) to encrypt data in transit. This protects your API key and any sensitive data from eavesdropping during transmission. PostNord APIs inherently enforce HTTPS.
• Validate SSL/TLS certificates: Configure your application to always validate the SSL/TLS certificates of PostNord API endpoints. This prevents man-in-the-middle attacks where an attacker might try to impersonate the PostNord server.

Error Handling and Logging

• Avoid exposing API keys in logs: Ensure that your application's logging mechanisms do not inadvertently log API keys or other sensitive authentication details. Mask or redact such information before logging.
• Implement robust error handling: Design your application to gracefully handle authentication errors. Do not provide overly verbose error messages that could reveal sensitive system information or hint at the nature of the authentication failure to potential attackers.

By implementing these security best practices, developers can significantly reduce the risk associated with API key authentication and maintain a secure integration with PostNord's logistics services.