Is there an API that tells me if content is AI generated?

Quick answer: Yes. I've professionally been exposed to peers using Originality.ai and GPTZero. Some others, like Winston AI, can come out cheaper depending on when you visit their site, first time discounts, etc.

-----

Long answer that might help you/others: This will actually depend on which content you're concerned with. Some are better at text, some are better at image, some are better at video (for quality ones like those from Veo or in-house/HuggingFace based models).

I'd actually do a fast search for which content you're looking check along with an API comparison between the services that do this. For basic foundational models, you can actually use any of them with a high degree of reliability so I'd see both who is the cheapest but also who happens to be running any discounts when you visit their website at the time you want to implement this.

Another option is using OpenAI or Claude directly itself. This might be a hot take, but the bigger the foundational model in terms of adoption, generally the cheaper such models would be (e.g. gpt nano APT usage is significantly cheaper than something like o3).

The cheaper a model used to generate non-purposeful poop on the internet, the easier it is to find with itself if that makes sense. Might be cheaper to not use a service and instead just use something like OpenAI's API directly and know that you might not catch 99% of the junk, but if you can catch 90% and that works for your usecase I'd say go for it.

Sorry for the wall, hope this helps/gave you food for thought. This is actually fairly complex because SEO content has typically been written with a certain structure. That structure is what makes it incredibly easy to train AI models on, so now we've moved from people writing "robotic" content to AI writing robotic content, which definitely makes this harder to do. Whoops!

Lots of great answers here, another place to look is RapidAPI. There are around 40 results when you search for AI detector. It'll show latency, reviews, prices, etc. all in one place. Like others have said though, these detectors don't work perfectly, and will often say human text is AI-generated, and vice versa.

I've Googled "ai generated checker api" and found TONS of results. Are you looking for something specific?

Once I had the same idea and I thought this is original and cool but found out there are tons of tools for this. Just one google away.

There are quite a few such tools, but honestly, they don’t always catch everything. There are also cases where they flag content that isn’t AI-generated.

Overall, they do their job, but I think even without such tools you can detect whether something is AI-generated.

i need this too