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

# Rate Limits

1. ApiKey

   ApiKey needs to be added to the header of all requests:

   ```
     ApiKey: <ApiKey>   
   ```
2. Rate Limits
   * GET 50 calls/second
   * POST 20 calls/second