Sample API Ideas

To that end, here is a list of API ideas you can build and monetize easily.

• Payment APIs.
• Sports Ticketing APIs.
• Curb-Side Food Ordering APIs.
• Sports Fantasy Drafting APIs.
• Blog Content Management System (CMS) APIs.
• Notification APIs.
• Generate QR Code
• AI APIs
• Random User Generator
• Reminder API
• Event API Console
• Fraud detection algorithms
• Social Network APIs
• Invoice API
• Subscribe / Unsubscribe API
• Rent API
• Chat API
• Image Generator
• Web crawler based on topic API
• Financial Services
  • IBAN APIs
  • Open Account
  • Facilities
  • Another Services
• Diagnostic service
  • Plants 
  • Music 
  • Image
  • Another
• Form Submission API (Static Websites)

Dynamic websites have servers to handle form submissions, but for static websites, that’s not usually a consideration. However, static websites still have to use some important forms like the contact form found in most websites today. Since static website developers are unwilling to manage databases and servers because of a contact form, why not just do that for them. You can simply handle the database and server, only to ensure that the messages get sent to the correct email address. For extra flair, you can even add a simple frontend that users can log in to see all messages they’ve gotten through their contact forms.

• Meme API

Memes are undoubtedly a sensation on today’s internet, and you can take advantage of that to build API developers can use to integrate a meme creation functionality into their websites. You can make it as simple or as elaborate as you want, integrating as many features as you can care to build.
Some of the options that could go into the API request include a text font size option, which would allow users to alter how large text appears on the image they submit. Other crucial options include text location and text background color for the location and background color of the text respectively.

• Notes API

The Notes API is exactly what it sounds like: an API that lets users integrate a note management feature into their web apps. You’ll need to provide a database for the API to function properly, as well as CRUD to enter, update, or modify the notes that users keep.

The most basic functions to add to the API are endpoints that let the developer implement options that enable them to add, read, and delete notes.  Users should also be able to add titles to their notes and group similar notes together by name and date.

You can make your Notes API more advanced by adding a search functionality that looks through their notes to bring up specific entries automatically. Undoubtedly, the Notes API is one of the most practical API ideas in this collection.

• Email Verification API

In this case, the email verification API will take email addresses as input, check if the supplied email is valid, and revert a positive or negative response. You can even build the functionality to let the API receive multiple inputs at a time for people trying to verify large email lists.

As for the verification itself, you can do that by validating the format of the email address for a start. After doing that, you can look up the MX records and try to use them to connect to the SMTP server. If any of the steps fail, the program automatically outputs a negative response.

• FAQ API

The FAQ API will make it possible to create a Quora-like website where people can add, read, delete, and update, questions and answers. While it’s technically similar to the Notes API in structure, it will require far more skills and dedication to create than the Notes API.

The API should manage accounts for authors, and authors should be able to add new entries to both the questions and answers databases. They should also be able to modify the questions and answers they create, and the questions should be separated by tags and categories.

• Ideas AI (Ideas on this page are 100% generated by OpenAI's GPT-3)
•  …

Have an initial tech startup draft and start talking with an outstanding software engineer and business person that is willing to help you get everything ready to start getting attention from investors (if needed, because maybe you could get the final results up and running yourself)