---
title: resource_manager
sidebarTitle: resource_manager
---
# `fastmcp.resources.resource_manager`
Resource manager functionality.
## Classes
### `ResourceManager`
Manages FastMCP resources.
**Methods:**
#### `get_resources`
```python
get_resources(self) -> dict[str, Resource]
```
Get all registered resources, keyed by URI.
#### `get_resource_templates`
```python
get_resource_templates(self) -> dict[str, ResourceTemplate]
```
Get all registered templates, keyed by URI template.
#### `add_resource_or_template_from_fn`
```python
add_resource_or_template_from_fn(self, fn: Callable[..., Any], uri: str, name: str | None = None, description: str | None = None, mime_type: str | None = None, tags: set[str] | None = None) -> Resource | ResourceTemplate
```
Add a resource or template to the manager from a function.
**Args:**
- `fn`: The function to register as a resource or template
- `uri`: The URI for the resource or template
- `name`: Optional name for the resource or template
- `description`: Optional description of the resource or template
- `mime_type`: Optional MIME type for the resource or template
- `tags`: Optional set of tags for categorizing the resource or template
**Returns:**
- The added resource or template. If a resource or template with the same URI already exists,
- returns the existing resource or template.
#### `add_resource_from_fn`
```python
add_resource_from_fn(self, fn: Callable[..., Any], uri: str, name: str | None = None, description: str | None = None, mime_type: str | None = None, tags: set[str] | None = None) -> Resource
```
Add a resource to the manager from a function.
**Args:**
- `fn`: The function to register as a resource
- `uri`: The URI for the resource
- `name`: Optional name for the resource
- `description`: Optional description of the resource
- `mime_type`: Optional MIME type for the resource
- `tags`: Optional set of tags for categorizing the resource
**Returns:**
- The added resource. If a resource with the same URI already exists,
- returns the existing resource.
#### `add_resource`
```python
add_resource(self, resource: Resource) -> Resource
```
Add a resource to the manager.
**Args:**
- `resource`: A Resource instance to add. The resource's .key attribute
will be used as the storage key. To overwrite it, call
Resource.model_copy(key=new_key) before calling this method.
#### `add_template_from_fn`
```python
add_template_from_fn(self, fn: Callable[..., Any], uri_template: str, name: str | None = None, description: str | None = None, mime_type: str | None = None, tags: set[str] | None = None) -> ResourceTemplate
```
Create a template from a function.
#### `add_template`
```python
add_template(self, template: ResourceTemplate) -> ResourceTemplate
```
Add a template to the manager.
**Args:**
- `template`: A ResourceTemplate instance to add. The template's .key attribute
will be used as the storage key. To overwrite it, call
ResourceTemplate.model_copy(key=new_key) before calling this method.
**Returns:**
- The added template. If a template with the same URI already exists,
- returns the existing template.
#### `has_resource`
```python
has_resource(self, uri: AnyUrl | str) -> bool
```
Check if a resource exists.
#### `get_resource`
```python
get_resource(self, uri: AnyUrl | str) -> Resource
```
Get resource by URI, checking concrete resources first, then templates.
**Args:**
- `uri`: The URI of the resource to get
**Raises:**
- `NotFoundError`: If no resource or template matching the URI is found.
#### `read_resource`
```python
read_resource(self, uri: AnyUrl | str) -> str | bytes
```
Internal API for servers: Finds and reads a resource, respecting the
filtered protocol path.