---
title: components
sidebarTitle: components
---
# `fastmcp.utilities.components`
## Classes
### `FastMCPMeta`
### `FastMCPComponent`
Base class for FastMCP tools, prompts, resources, and resource templates.
**Methods:**
#### `make_key`
```python
make_key(cls, identifier: str) -> str
```
Construct the lookup key for this component type.
**Args:**
- `identifier`: The raw identifier (name for tools/prompts, uri for resources)
**Returns:**
- A prefixed key like "tool:name" or "resource:uri"
#### `key`
```python
key(self) -> str
```
The globally unique lookup key for this component.
Format: "{key_prefix}:{identifier}" e.g. "tool:my_tool", "resource:file://x.txt"
Subclasses should override this to use their specific identifier.
Base implementation uses name.
#### `get_meta`
```python
get_meta(self, include_fastmcp_meta: bool | None = None) -> dict[str, Any] | None
```
Get the meta information about the component.
If include_fastmcp_meta is True, a `_fastmcp` key will be added to the
meta, containing a `tags` field with the tags of the component.
#### `enable`
```python
enable(self) -> None
```
Removed in 3.0. Use server.enable(keys=[...]) instead.
#### `disable`
```python
disable(self) -> None
```
Removed in 3.0. Use server.disable(keys=[...]) instead.
#### `copy`
```python
copy(self) -> Self
```
Create a copy of the component.
#### `register_with_docket`
```python
register_with_docket(self, docket: Docket) -> None
```
Register this component with docket for background execution.
No-ops if task_config.mode is "forbidden". Subclasses override to
register their callable (self.run, self.read, self.render, or self.fn).
#### `add_to_docket`
```python
add_to_docket(self, docket: Docket, *args: Any, **kwargs: Any) -> Execution
```
Schedule this component for background execution via docket.
Subclasses override this to handle their specific calling conventions:
- Tool: add_to_docket(docket, arguments: dict, **kwargs)
- Resource: add_to_docket(docket, **kwargs)
- ResourceTemplate: add_to_docket(docket, params: dict, **kwargs)
- Prompt: add_to_docket(docket, arguments: dict | None, **kwargs)
The **kwargs are passed through to docket.add() (e.g., key=task_key).