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fastmcp.resources.resource_manager

Resource manager functionality.

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Classes

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ResourceManager

Manages FastMCP resources. Methods:

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mount 

mount(self, server: MountedServer) -> None
Adds a mounted server as a source for resources and templates.

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get_resources 

get_resources(self) -> dict[str, Resource]
Get all registered resources, keyed by URI.

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get_resource_templates 

get_resource_templates(self) -> dict[str, ResourceTemplate]
Get all registered templates, keyed by URI template.

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list_resources 

list_resources(self) -> list[Resource]
Lists all resources, applying protocol filtering.

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list_resource_templates 

list_resource_templates(self) -> list[ResourceTemplate]
Lists all templates, applying protocol filtering.

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add_resource_or_template_from_fn 

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.

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add_resource_from_fn 

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.

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add_resource 

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.

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add_template_from_fn 

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.

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add_template 

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.

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has_resource 

has_resource(self, uri: AnyUrl | str) -> bool
Check if a resource exists.

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get_resource 

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.

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read_resource 

read_resource(self, uri: AnyUrl | str) -> str | bytes
Internal API for servers: Finds and reads a resource, respecting the filtered protocol path.