APIs (Application Programming Interfaces) are useful because they allow different software systems to communicate with each other and exchange data in a standardized way. APIs can also be used to expose functionality of a system to other developers, who can then use that functionality in their own applications.

Here are 20 APIs that I think your next project might need them:

Google Maps API

Allows you to integrate maps and location-based features into your app or website. You can use this API to display maps, get directions, and search for businesses and points of interest.

Twitter API

Allows you to access and interact with Twitter data, such as tweets and user information. You can use this API to search for tweets, get user profiles, and post updates.

Facebook API

Allows you to access and interact with Facebook data, such as user profiles and social graph information. You can use this API to read and write data to Facebook, including posting updates and reading news feed data.

Dropbox API

Allows you to access and manipulate files stored in a Dropbox account. You can use this API to upload and download files, create and delete folders, and manage file metadata.

Stripe API

Allows you to process payments and handle subscriptions. You can use this API to accept payments, create and manage subscriptions, and handle other payment-related tasks.

PayPal API

Allows you to process payments and handle transactions. You can use this API to accept payments, manage subscriptions, and handle other financial tasks.

Google Sheets API

Allows you to read and write data to Google Sheets. You can use this API to retrieve and update data in Google Sheets, as well as to create and delete sheets.

Google Drive API

Allows you to access and manipulate files stored in a Google Drive account. You can use this API to upload and download files, create and delete folders, and manage file metadata.

Google Calendar API

Allows you to access and manipulate calendar events and scheduling information. You can use this API to create, update, and delete events, as well as to manage calendars and scheduling data.

Twilio API

Allows you to send and receive text messages, make and receive phone calls, and handle other communication tasks. You can use this API to build communication features into your app or website.

Slack API

Allows you to build integrations for the Slack messaging platform. You can use this API to create custom bots, integrate with third-party apps, and build other types of integrations.

Spotify API

Allows you to access and manipulate music data from the Spotify service. You can use this API to search for songs, get playlists, and retrieve other music-related data.

GitHub API

Allows you to access and manipulate data from the GitHub repository hosting service. You can use this API to create and manage repositories, track issues, and perform other tasks related to code development.

Mailchimp API

Allows you to access and manipulate data from the Mailchimp email marketing platform. You can use this API to create and send emails, manage subscriber lists, and track email performance.

Salesforce API

Allows you to access and manipulate data from the Salesforce customer relationship management platform. You can use this API to create and manage customer records, track sales and support requests, and perform other tasks related to customer management.

AWS API

Allows you to access and use many of the services provided by Amazon Web Services. This API provides access to a wide range of cloud computing resources and services, including storage, computing, and networking.

Microsoft Azure API

Allows you to access and use many of the services provided by Microsoft Azure. This API provides access to a variety of cloud computing resources and services, including storage, computing, and networking.

IBM Watson API

Allows you to access and use many of the artificial intelligence and machine learning services provided by IBM.

Google Cloud API

Allows you to access and use many of the services provided by Google Cloud. This API provides access to a variety of cloud computing resources and services, including storage, computing, and networking.

Yahoo Finance API

Allows you to access financial market data and stock information. You can use this API to retrieve data on stock prices, market trends, and other financial data.