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Added to_data_uri method for Image class. (#2227)

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* Added to_data_uri method and path_to_data_uri classmethod for Image class.

* Removed path_to_data_uri classmethod and modified _get_mime_type to use mimetypes.guess_type function instead of hardcoded dictionary.

* Register image/webp with mimetypes before guess_type to support WEBP mimetype detection on Python 3.10.

* Improved branch coverage for Image.to_data_uri.

* Added Image._to_data_uri example in the docs.
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Harshith Thota 2025-11-01 21:10:08 +05:30 • committed by GitHub
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10
docs/servers/icons.mdx
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@ -115,6 +115,7 @@ For small icons or when you want to embed the icon directly, use data URIs:
```python
from mcp.types import Icon
from fastmcp.utilities.types import Image
# SVG icon as data URI
svg_icon = Icon(
@ -126,4 +127,13 @@ svg_icon = Icon(
def my_tool() -> str:
"""A tool with an embedded SVG icon."""
return "result"
# Generating a data URI from a local image file.
img = Image(path="./assets/brand/favicon.png")
icon = Icon(src=img.to_data_uri())
@mcp.tool(icons=[icon])
def file_icon_tool() -> str:
"""A tool with an icon generated from a local file."""
return "result"
```