fastmcp.utilities.mime

MIME type constants and helpers for MCP Apps UI resources.

This module has no dependencies on the server or resource packages, so it can be safely imported from anywhere.

Functions

resolve_ui_mime_type ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/utilities/mime.py#L10" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

resolve_ui_mime_type(uri: str, explicit_mime_type: str | None) -> str | None

Return the appropriate MIME type for a resource URI.

For ui:// scheme resources, defaults to UI_MIME_TYPE when no explicit MIME type is provided.

Args:

• uri: The resource URI string
• explicit_mime_type: The MIME type explicitly provided by the user

Returns:

• The resolved MIME type (explicit value, UI default, or None)