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"""
FastMCP Example - Digital Sales API Integration
This example demonstrates how to create an MCP server from an OpenAPI specification.
The server must be running before starting the main application.
"""
import httpx
from fastmcp import FastMCP
from fastmcp.server.openapi import (
HTTPRoute,
OpenAPITool,
OpenAPIResource,
OpenAPIResourceTemplate,
)
# Configuration
API_BASE_URL = "https://digitalsales.19pc1vtv090u.us-east.codeengine.appdomain.cloud"
OPENAPI_SPEC_URL = f"{API_BASE_URL}/openapi.json"
def customize_components(
route: HTTPRoute,
component: OpenAPITool | OpenAPIResource | OpenAPIResourceTemplate,
) -> None:
"""
Customize MCP components by adding response schema information to tool descriptions.
Args:
route: The HTTP route being processed
component: The MCP component to customize
"""
if isinstance(component, OpenAPITool):
print(component.output_schema)
component.description = f"{component.description}\nresponse schema: ```\n{component.output_schema}```"
def create_mcp_server() -> FastMCP:
"""
Create and configure the MCP server from OpenAPI specification.
Returns:
FastMCP: Configured MCP server instance
"""
# Create HTTP client for API communication
client = httpx.AsyncClient(base_url=API_BASE_URL)
# Load OpenAPI specification
spec = httpx.get(OPENAPI_SPEC_URL).json()
# Create MCP server from OpenAPI spec
mcp = FastMCP.from_openapi(
openapi_spec=spec,
client=client,
mcp_component_fn=customize_components,
)
return mcp
def main():
"""Main function to run the MCP server."""
mcp = create_mcp_server()
print("Starting FastMCP server...")
print("Server must be running before starting the main application.")
mcp.run(transport="sse")
if __name__ == "__main__":
main()
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