> For the complete documentation index, see [llms.txt](https://mukeshsolanki.gitbook.io/hashtag-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mukeshsolanki.gitbook.io/hashtag-api/authentication.md).

# Authentication

```
'X-RapidAPI-Host: hashtag5.p.rapidapi.com'
'X-RapidAPI-Key: YOUR_API_KEY'
```

These details will be obtained by signing up for an account at [![](https://img.shields.io/badge/rapidapi-hashtagger-21A480.svg?logo=rapidapi)](https://rapidapi.com/mukeshsolanki1/api/hashtag5)

<mark style="color:red;">Nothing will work unless you include this API key.</mark>