Postman Getting Started: Account, Keys, and First Request (2026)

Getting started overview

Getting started with Postman involves setting up your environment, which typically includes creating an account, installing the desktop application or accessing the web client, and then initiating your first API request. Postman supports various API types, including REST, SOAP, GraphQL, and WebSockets, providing a unified interface for designing, documenting, testing, and monitoring APIs Postman platform overview. The free tier allows individuals and small teams to begin without immediate cost, offering features like request building, collection management, and basic collaboration Postman pricing details.

This guide focuses on the fundamental steps to quickly make your first functional API call using Postman. It covers account creation, understanding credentials, and executing a simple HTTP GET request.

Quick Start Reference

Create an account and get keys

A Postman account is essential for leveraging cloud synchronization, collaboration features, and accessing the Postman API Network Postman introduction. While you can use the desktop application without signing in, many features require an active account.

Account Creation

1. Navigate to the Postman signup page.
2. You can sign up using an email address, or through Google. Using an email requires you to verify your address.
3. Once registered, you'll be prompted to create a workspace, which serves as an organized space for your API collections and environments.

Understanding API Keys and Credentials

Postman itself does not generally require an API key to send requests to other APIs. Instead, it provides tools to manage and securely use keys provided by the third-party APIs you interact with. For example, if you are calling the Stripe API, you would obtain your secret key from your Stripe Dashboard and configure Postman to include it in your request headers or body, often as a bearer token or basic authentication.

However, Postman does offer its own API for programmatic interaction with your Postman workspaces, collections, and environments Postman API reference. If you intend to automate tasks within Postman itself, such as exporting collections or running tests from a CI/CD pipeline using a tool like Newman CLI, you will need a Postman API key (Personal Access Token).

Generating a Postman API Key (Personal Access Token)

1. Log in to your Postman account in the web app or desktop app.
2. Go to your API Keys dashboard.
3. Click Generate API Key.
4. Provide a name for your key and confirm. Save this key securely, as it will only be shown once.

This key grants access to your Postman account's resources via the Postman API.

Your first request

This section guides you through making a simple HTTP GET request to a public API using Postman.

Using the Postman Desktop App or Web App

1. Open Postman: Launch the Postman Desktop App or navigate to the Postman Web App and sign in.
2. Create a New Request: Click the + tab next to the existing tabs, or click New > HTTP Request from the workspace sidebar.

   A new request tab will open, showing a blank request builder interface.

3. Select Request Method: By default, the method is set to GET. For this example, keep it as GET.
4. Enter Request URL: In the URL input field, enter a public API endpoint. A common choice for a simple test is a public API that returns JSON data, such as a placeholder API for users or posts. For example, use https://jsonplaceholder.typicode.com/posts/1. This endpoint should return a single post object JSONPlaceholder guide.
5. Send the Request: Click the Send button (usually blue) to the right of the URL input field.
6. View the Response: The response section at the bottom of the screen will populate with the API's response. You should see:
   • Status: A 200 OK status code, indicating a successful request.
   • Body: The JSON data returned by the API, formatted for readability.
   • Headers: HTTP response headers.
   • Cookies: Any cookies set by the server.
7. Save the Request (Optional): To save this request for future use, click the Save button. You'll be prompted to save it into an existing collection or create a new one. Collections are fundamental for organizing your API requests in Postman Postman collections documentation.

Common next steps

After successfully sending your first request, consider these common next steps to expand your use of Postman:

• Explore Collections: Organize your requests into collections. Collections can be shared with team members, include variables, and define pre-request scripts or tests. This is crucial for managing multiple related API calls. For example, a collection for a payment gateway API might include separate requests for creating a customer, processing a charge, and refunding a transaction PayPal REST API documentation.
• Use Environments: Create environments to manage different configurations (e.g., development, staging, production) for your API calls. Environments allow you to switch between API base URLs, authentication tokens, and other variables without modifying individual requests Postman environments guide.
• Add Pre-request Scripts and Tests: Extend the functionality of your requests with JavaScript. Pre-request scripts can generate dynamic data or handle authentication, while test scripts can validate API responses against expected outcomes, automating your API testing workflow.
• Import OpenAPI/Swagger Definitions: If you are working with an API that provides an OpenAPI (formerly Swagger) definition, import it into Postman to automatically generate collections with all endpoints, request bodies, and examples about the OpenAPI Specification.
• Collaborate with Workspaces: Invite team members to your workspaces to share collections, environments, and API definitions, fostering collaborative API development and testing efforts.
• Monitor APIs: Set up monitors to regularly check the health and performance of your APIs from various geographic regions, receiving alerts for downtime or unexpected behavior Postman API monitoring.

Troubleshooting the first call

When your first API call doesn't return the expected 200 OK status, consider the following common issues:

• Incorrect URL: Double-check the endpoint URL for typos, missing slashes, or incorrect domain names. Even a small error can lead to a 404 Not Found or Invalid URL response. Ensure the protocol (http:// or https://) is correct.
• Network Connectivity: Verify your internet connection. If you are behind a corporate firewall or proxy, Postman might need specific proxy configuration Postman proxy settings.
• API Endpoint Availability: The target API server might be down or unreachable. Try accessing the API's documentation or status page to confirm its operational status.
• Authentication Issues (for protected APIs): If the API requires authentication (e.g., API key, OAuth 2.0, bearer token), ensure you've correctly configured the Authorization tab in Postman. A common error is a 401 Unauthorized or 403 Forbidden status, indicating missing or invalid credentials.
• Method Mismatch: Ensure the HTTP method (GET, POST, PUT, DELETE, etc.) selected in Postman matches the method expected by the API endpoint. Using GET on an endpoint that only accepts POST will likely result in a 405 Method Not Allowed error.
• Required Headers or Body: Some APIs require specific headers (e.g., Content-Type, Accept) or a request body for POST/PUT requests. Check the API's documentation to ensure all necessary components are included and correctly formatted.
• SSL Certificate Issues: Rarely, you might encounter SSL certificate validation errors. Postman has settings to disable SSL certificate verification temporarily, though this is not recommended for production environments Postman SSL verification.
• CORS Policy: If you're using the Postman Web App to call an API directly from a browser, Cross-Origin Resource Sharing (CORS) policies may restrict requests to different domains. The Postman Desktop App often bypasses these browser-specific restrictions for API testing.