---
updatedAt: 2026-09-18T16:26:29.000Z
agentTools:
  projectIndex: https://docs.company.info/llms.txt
---

# API Key header

# API key header

Authenticate API requests by sending your API key in the `X-API-Key` HTTP header:

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

Example:

```bash
curl --request GET \
  --url 'https://api.company.info/{endpoint}' \
  --header 'X-API-Key: YOUR_API_KEY'
```

For information about obtaining and protecting a key, API access, trial usage, rate limiting, and troubleshooting, see [API keys & access](https://docs.company.info/docs/authentication).