Implementation of SEP 973 - Additional metadata + icons support (#1357)

examples/fastmcp/icons_demo.py

@@ -0,0 +1,55 @@
+"""
+FastMCP Icons Demo Server
+
+Demonstrates using icons with tools, resources, prompts, and implementation.
+"""
+
+import base64
+from pathlib import Path
+
+from mcp.server.fastmcp import FastMCP, Icon
+
+# Load the icon file and convert to data URI
+icon_path = Path(__file__).parent / "mcp.png"
+icon_data = base64.standard_b64encode(icon_path.read_bytes()).decode()
+icon_data_uri = f"data:image/png;base64,{icon_data}"
+
+icon_data = Icon(src=icon_data_uri, mimeType="image/png", sizes="64x64")
+
+# Create server with icons in implementation
+mcp = FastMCP("Icons Demo Server", website_url="https://github.com/modelcontextprotocol/python-sdk", icons=[icon_data])
+
+
+@mcp.tool(icons=[icon_data])
+def demo_tool(message: str) -> str:
+    """A demo tool with an icon."""
+    return message
+
+
+@mcp.resource("demo://readme", icons=[icon_data])
+def readme_resource() -> str:
+    """A demo resource with an icon"""
+    return "This resource has an icon"
+
+
+@mcp.prompt("prompt_with_icon", icons=[icon_data])
+def prompt_with_icon(text: str) -> str:
+    """A demo prompt with an icon"""
+    return text
+
+
+@mcp.tool(
+    icons=[
+        Icon(src=icon_data_uri, mimeType="image/png", sizes="16x16"),
+        Icon(src=icon_data_uri, mimeType="image/png", sizes="32x32"),
+        Icon(src=icon_data_uri, mimeType="image/png", sizes="64x64"),
+    ]
+)
+def multi_icon_tool(action: str) -> str:
+    """A tool demonstrating multiple icons."""
+    return "multi_icon_tool"
+
+
+if __name__ == "__main__":
+    # Run the server
+    mcp.run()