Support MCP Resource Templates / Dynamic Resources

[LLukas22]

Description

Enable support for dynamic MCP resources, such as echo://{message}.

Ideally, this functionality should be expanded to accommodate resources with multiple inputs. However, this serves as an initial draft.

Checklist

• The relevant docs, if any, have been updated or created
• The relevant tests, if any, have been updated or created

Screenshots

MCPTemplates.mp4

Testing instructions

Create MCP test server, e.g.:

from mcp.server.fastmcp import FastMCP

mcp = FastMCP("Echo")

@mcp.resource("echo://test", name="test")
def test_resource() -> str:
    """Echo a message as a resource"""
    return "Test"

@mcp.resource("echo://{message}", name="echo")
def echo_resource(message: str) -> str:
    """Echo a message as a resource"""
    return f"Resource echo: {message}"


@mcp.resource("echo://{input}", name="other_template_resource")
def echo_resource(input: str) -> str:
    """other template resource"""
    return f"Your input: {input}"


if __name__ == "__main__":
    print("Starting Echo Server ...")
    mcp.run()

Add to config e.g.:

mcpServers:
  - name: MCPEcho
    command: uv
    args:
      - --directory=[PATH_TO_SERVER]
      - run
      - server.py

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