Post to YouTube from an agent

PostWharf ships a Model Context Protocol server, so Claude and other MCP clients can draft, queue and check YouTube posts as tools rather than as scraped UI.

Overview API MCP CLI

Connect it

claude mcp add --transport http \
  wharf https://mcp.postwharf.com/mcp \
  --header "Authorization: Bearer $POSTWHARF_KEY"

The key scopes every call to one workspace, so an agent can only ever act on the brand you hand it. Find it in the dashboard under API keys. For the other clients, ChatGPT and Cursor among them, and what each tool does, see the social media MCP server page.

What the agent can do with YouTube

get_workspaceWhich brand this key reaches, and the clock it schedules on

list_channelsFind your connected YouTube account and its token health

describe_networksWhat YouTube takes: shapes, how many files, how much text, its own settings

connect_channelStart connecting an account, which you finish by signing in

stage_uploadAn upload link and a public address for a file just made

upload_mediaRegister an image or video, get a media id

describe_mediaWrite or replace the alt text on an image

set_video_coverChoose the picture a video is shown behind, or a frame of it

create_postPublish to YouTube now

schedule_postQueue a post for a given time

schedule_manyQueue a month of YouTube posts in one go

save_draftKeep a post without sending it, channels optional

list_draftsEverything saved and not yet sent

update_postChange the words, the time or the files on a draft or a queued post

publish_draftRelease a draft, now or at a time you pick

get_statusDelivery state, live URL, error text

list_queueWhat is scheduled and when

cancel_postPull something back out of the queue

retry_postSend a post again where it failed, and only there

list_eventsThe delivery receipt feed

healthWhether the API is reachable

What YouTube accepts

5,000 characters, counting the description. One video per post. YouTube takes no still images as attachments.

Read from the table the API enforces, so a post over 5,000 is refused when you create it rather than truncated on the way to YouTube.

Asking for it in practice

# to Claude, with the connector attached
"Draft three YouTube posts about the new release,
 queue the best one for Tuesday morning,
 and tell me once it is live."

The agent drafts and queues; the delivery receipt tells you what actually published. Daily quota applies; the queue paces around it rather than failing.

Every other network

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