Hi there I am reading over some API docs and wondering they mean when the say "source machines using native HTTP facilities?

Is this saying, only use cURL and not Axios?

does native HTTP facilities mean older ways of sending requests?

Does source machine mean the client?

Here is what im trying to interpret

Your backend services can also add media to Conversations by uploading and attaching files to Conversations Messages. This section provides a brief overview of the typical Media flow using the REST API. For a more detailed API description, please refer to Conversations Media REST API documentation.

Note: Currently, Media Content Service (MCS) provides the underlying Media REST endpoint used to create (upload) the media (files). It is a separate endpoint and not supported in the Twilio Helper Libraries or the Twilio CLI.

Sending a Media Message Sending a Media Message via the REST API is a two-step process:

First, upload the media file to Twilio's Media Content Service (MCS) via the REST API Send a media message to the Conversation by attaching the media instance that you created in Step 1 to a new Conversation Message Uploading media should be done directly from the source machine, using native HTTP facilities. Using cURL, the equivalent request looks like this: