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

# Authentication

To use the CorpDev.Ai API, you need a valid API key. Here’s how to get started:

1. **Subscription Requirement:** Ensure you have a paid subscription that includes API access (Professional tier or above).
2. **Generate API Key:** Log in to your CorpDev.Ai account, navigate to `Account Settings > API Access`, and generate your API key.

#### Making Authenticated Requests

Include your API key in the `X-API-Key` header of your HTTP requests, formatted as follows:

```http
X-API-Key: YOUR_API_KEY
```

Keep your API key secure and do not share it publicly.