Bitly Getting Started: Account Setup & First API Call (2026)

Getting started overview

Getting started with the Bitly API involves a sequence of steps to onboard successfully and make the first functional API call. The primary goal is to obtain an OAuth 2.0 access token, which is essential for authenticating all requests to the Bitly API. Once an account is established and a token generated, developers can proceed to make a basic request, such as shortening a URL, to confirm the setup is correct. Bitly's API is RESTful and uses standard HTTP methods for interactions, making it accessible for developers familiar with web services.

This guide will walk through creating a Bitly account, generating the necessary API credentials, and executing a simple URL shortening request. The Bitly developer portal offers comprehensive Bitly API documentation that details all available endpoints and parameters.

Here's a quick reference to the steps involved:

Create an account and get keys

To begin using the Bitly API, the initial step is to create a Bitly account. Bitly offers a free tier that allows for a limited number of shortened links, QR codes, and custom domains, which is suitable for initial API testing and development. Paid plans, such as the Starter tier, commence at $8 per month when billed annually, offering expanded features and higher usage limits.

Account Registration

1. Navigate to the Bitly homepage.
2. Click on the "Sign Up" or "Get Started For Free" button.
3. Follow the prompts to create an account using an email address, Google account, or Apple ID.
4. Verify your email address if required.

Generating an OAuth 2.0 Access Token

Bitly uses OAuth 2.0 for API authentication. For developer use, a personal access token can be generated from your account settings. This token acts as a bearer token, which is included in the Authorization header of your API requests. For production applications, consider implementing a full OAuth 2.0 flow to secure user data, as detailed in the Bitly authentication guide.

1. Log in to your Bitly account.
2. Go to "Account Settings."
3. Select "Developer Settings" or "API Access Tokens."
4. Locate the section to generate a "Generic Access Token" or "Personal Access Token."
5. Click "Generate Access Token" and carefully copy the token displayed. This token is sensitive and should be stored securely. It provides full access to your Bitly account programmatically.

Your first request

Once you have an OAuth 2.0 access token, you can make your first API call. The most common initial request is to shorten a URL. This example uses curl due to its simplicity and ubiquity for demonstrating HTTP requests. Replace YOUR_ACCESS_TOKEN with the actual token you generated and YOUR_LONG_URL with the URL you wish to shorten.

Bitly's API endpoint for shortening links is https://api-ssl.bitly.com/v4/shorten. The request body should be a JSON object containing the long_url property.

Example: Shorten a URL with cURL

curl -X POST "https://api-ssl.bitly.com/v4/shorten" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{ "long_url": "https://www.example.com/very/long/url/that/needs/shortening" }'

A successful response will return a JSON object containing the shortened URL and other details, similar to this:

{
  "created_at": "2026-05-29T10:00:00+0000",
  "id": "bit.ly/example",
  "link": "https://bit.ly/example",
  "long_url": "https://www.example.com/very/long/url/that/needs/shortening",
  "custom_bitlinks": [],
  "tags": [],
  "deeplinks": [],
  "references": {
    "group": "https://api-ssl.bitly.com/v4/groups/YOUR_GROUP_GUID"
  }
}

The link field in the response contains the newly shortened URL.

Common next steps

After successfully making your first API call, several common next steps can enhance your use of the Bitly API:

• Explore More Endpoints: Review the Bitly API reference to understand other capabilities, such as creating custom bitlinks, managing groups, retrieving link metrics, and generating QR codes.
• Integrate into an Application: Incorporate the API calls into your preferred programming language. Libraries for HTTP requests are widely available across languages (e.g., requests in Python, fetch in JavaScript, HttpClient in C#).
• Set Up Custom Domains: For branded links, configure a custom domain within your Bitly account and use it for shortening URLs. This allows your shortened links to use your own domain (e.g., link.yourcompany.com/abc) instead of bit.ly. Details are available in the Bitly support documentation on custom domains.
• Handle Rate Limits: Bitly imposes rate limits on API requests to ensure fair usage. Implement logic in your application to handle 429 Too Many Requests responses, typically by retrying requests after a delay.
• Secure API Keys: Never hardcode API keys directly into client-side code or public repositories. Use environment variables, secret management services, or server-side proxies to protect your access token. For guidance on securing API keys, consult resources like Google Cloud's API key security best practices.
• Webhooks: For real-time notifications about events like new link clicks, consider setting up webhooks. This allows Bitly to send data to your application when specific events occur, enabling dynamic responses.

Troubleshooting the first call

When making your first API call, you might encounter issues. Here are some common problems and their solutions:

• 401 Unauthorized:
  • Issue: Your access token is missing, invalid, or expired.
  • Solution: Double-check that you included the Authorization: Bearer YOUR_ACCESS_TOKEN header and that YOUR_ACCESS_TOKEN is the correct, unexpired token. Ensure there are no extra spaces or characters. Regenerate the token if unsure.
• 400 Bad Request:
  • Issue: The request body is malformed, or required parameters are missing.
  • Solution: Verify that your JSON payload is syntactically correct and includes the mandatory long_url field. Ensure the Content-Type: application/json header is set correctly. Refer to the Bitly API reference documentation for the exact expected format.
• 403 Forbidden:
  • Issue: Your account does not have the necessary permissions for the requested action, or you've hit a usage limit.
  • Solution: Check your Bitly plan and confirm it supports the API features you are trying to use. If on a free tier, certain advanced features might be unavailable.
• 429 Too Many Requests:
  • Issue: You have exceeded the API rate limits.
  • Solution: Implement a backoff strategy in your code to wait before retrying requests. Review Bitly's rate limit documentation for specific thresholds.
• Network Errors (e.g., DNS resolution failure):
  • Issue: Your machine cannot connect to Bitly's API servers.
  • Solution: Verify your internet connection. Ensure the API endpoint URL (https://api-ssl.bitly.com/v4/shorten) is correct and accessible from your network. Proxy settings or firewalls can sometimes interfere with outbound connections.

For persistent issues, the Bitly developer documentation and the Bitly API playground can be valuable tools for further debugging.