> ## Documentation Index
> Fetch the complete documentation index at: https://gofastmcp.com/llms.txt
> Use this file to discover all available pages before exploring further.
# horizon_client
# `fastmcp.cli.deploy.horizon_client`
Typed HTTP client for the Horizon control plane.
## Functions
### `normalize_api_origin`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
normalize_api_origin(value: str) -> str
```
Validate and normalize a Horizon API origin.
## Classes
### `HorizonError`
A safe Horizon client error.
### `HorizonUnavailableError`
The Horizon API could not be reached.
### `HorizonUnauthorizedError`
The Horizon credential was rejected.
### `HorizonResponseError`
Horizon returned an unexpected response.
### `DeviceAuthorization`
### `DeviceAccessToken`
**Methods:**
#### `require_nonempty_access_token`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
require_nonempty_access_token(cls, value: SecretStr) -> SecretStr
```
### `HorizonUser`
### `HorizonOrganization`
### `DeviceMetadata`
### `DeviceTokenPoll`
### `HorizonClient`
Call the Horizon routes used by FastMCP CLI authentication.
**Methods:**
#### `aclose`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
aclose(self) -> None
```
#### `create_device_authorization`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
create_device_authorization(self, metadata: DeviceMetadata | None = None) -> DeviceAuthorization
```
#### `exchange_device_authorization`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
exchange_device_authorization(self, device_code: str) -> DeviceTokenPoll
```
#### `get_current_user`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
get_current_user(self) -> HorizonUser
```
#### `list_organizations`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
list_organizations(self) -> tuple[HorizonOrganization, ...]
```
#### `revoke_current_api_key`
```python theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
revoke_current_api_key(self) -> None
```