Post to Bluesky from Claude

Attach PostWharf to Claude once, then publish or schedule Bluesky posts, threads and images by asking for them — and get a receipt saying what actually landed.

Connect it

A command for Claude Code, or a connect link for the Claude apps. One workspace key scopes every call to a single brand, so Claude can only ever reach the accounts in that workspace — not every account you run.

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

Ask for a Bluesky post

Once the server is attached the ask is a chat message, not a form — in whatever conversation you are already having, next to the draft rather than in another tab:

"Post this announcement to Bluesky now and tell me the URL."

Claude finds your connected Bluesky channel, checks the text against the 300-character ceiling before anything is queued, and hands back the queued time. Nothing publishes because a model decided it should.

Claude will show you the post before it queues it. That is the approval step, and it is worth keeping even once you trust the setup — the receipt tells you what published, but only you can tell it what was worth publishing.

What Bluesky accepts

Character limit300
Counted onone post
Formatsposts, threads and images

Connects in about a minute with an app password you create yourself — no review or audit to wait out.

What comes back

Every post carries a delivery receipt per channel: the state, the live URL once it is out, and the platform's own reason if it failed. Deliveries are re-checked after publishing, so a Bluesky post removed later stops reporting as live instead of sitting in your history as a success. Ask Claude for the status and it reads that receipt back rather than guessing.

Questions

Can Claude post to Bluesky automatically?

Yes. Connect the PostWharf MCP server to Claude and it can publish or schedule to a connected Bluesky channel, then read the delivery receipt back. The workspace key limits it to the accounts in one workspace, and you keep the approval step.

What do I need before Bluesky will work?

Connects in about a minute with an app password you create yourself — no review or audit to wait out. Once the channel is connected in PostWharf, Claude reaches it the same way it reaches every other network.

How long can a Bluesky post be?

300 characters, counted on one post. PostWharf checks that before the post is queued, so an over-length post is refused immediately rather than failing at Bluesky after everything else in the same batch has already published.