# Authentication

All API requests require authentication using an API key.

## Getting Your API Key

Contact your HG Insights account manager to obtain an API key.

## Using Your API Key

Include your API key in the `Authorization` header:


```bash
curl -X POST "https://api.hginsights.com/data-api/v2/companies/enrich" \
  -H "Authorization: bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"companies": {"ids": ["COMPANY_ID"]}}'
```

## API Key Format

v2 API keys start with `hg_v2_` followed by a random string.

Example: `hg_v2_K3WnkKrSyVD8yOoGTu1oqujB0f37eJuen1wvV2Ptg0`