I found the answer from the Stack Overflow question How to generate a Swagger #definition from sample JSON.
And I think SwagDefGen serve your request.
I tried and the generated Swagger file works when I import it in OpenAPI tools (i.e. studio.apicur.io) but it can only contain simple types, not complex types.
There is one more option on RapidAPI that you can give it a try to check VINs for US license plates:
They charge $0.06, $0.08 or $0.10 per request based on the plan you subscribe to.
SoundHound is an app I have used for years that makes a playlist for you on Spotify and there’s no charge. Find it in the App Store! It works great...very few songs are not recognized and it will even keep the song recorded that it can’t find and you can run it through at a later date.
It’s also available for Android devices so it’s great for those who use ...
In an effort to cut down on spam callers, I built a phone blocker from a Raspberry Pi. I used some Open Source software called NCID. It runs under several platforms and provides a caller log. I used the caller log to determine what callers I needed to block. The log contained the caller “name” and phone number. The software provides several packages and ...
You can try https://affinda.com/resume-parser/ for free - the web interface allows you to upload resumes for free, and get the results as XLS, XML or JSON. The best part is you don't get forced to speak to a sales team!
After much searching on my own, I found https://textyl.co/ which returns timestamp lyrics to songs. The API documentation for it isn't great and it occasionally can't find lyrics or returns the wrong ones, but it does the job and it's free with no API signup needed.
Though I was unable to find a completely free solution, I did find:
Alpha provides 5 free API requests a minute, up to 500 a day.
Besides the throttling, the only downside is that mutual funds data only update once a day, usually not until the morning after.
Telegram has a Bot API that does exactly what you seek.
They have samples for all the possible programming languages, so it's totally not a problem.
Going through your requirements:
offers an api to integrate in my development environment
offers a web application to use within a browser
it should be easy for me to add new users to my messaging ...