Bearer authentication using RSA Key/Value pairs

[ffarid2]

Hey Everyone!

We are looking to create our own MCP Server using FastMCP that will be running alongside our Flask App. This will allow us to use the methods within our Flask App in the MCP Tools.
We are looking to use the MCP Tools in the Deep Researcher calls where we will respond to the /search and /fetch tool calls with the appropriate solutions.

Now we want to authenticate the requests from OpenAI. In the call we can add the header and include the Bearer token. We generate this bearer token using the OpenSSL public/private key pairs.

On the MCP Server BearerAuthProvider method within fastmcp along with the public keys and it all seems to work well.

Do you think there are any security issues with this implementation? Is there any other way we can include authentication without having to involve another Authorization Server or Identity Provider