> ## Documentation Index
> Fetch the complete documentation index at: https://docs.metlo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication

**To make your endpoint inventory and test generation better you can define what
type of authentication your hosts use by editing the Metlo Config on the
settings tab in your UI.**

You can specify the type of authentication used on each of your hosts to improve
endpoint discovery and test generation. The possible authentication types are:
`basic`, `header`, `jwt`, `session_cookie`.

**Basic Auth**

```yaml YAML theme={null}
authentication:
  - host: www.example.com
    authType: basic
```

**JWT**

```yaml YAML theme={null}
authentication:
  - host: www.example.com
    authType: jwt
    headerKey: Authorization
    jwtUserPath: user.username
```

**Session Cookie**

```yaml YAML theme={null}
authentication:
  - host: www.example.com
    authType: session_cookie
    cookieName: _session_key
```

**Header**

```yaml YAML theme={null}
authentication:
  - host: www.example.com
    authType: header
    headerKey: X-API-KEY
```