Claude Cowork + PostAxis

Hand your social media to Claude Cowork

Claude Cowork works through longer tasks on your desktop. Add the PostAxis connector and it can turn a folder of notes, a launch doc or a product update into a scheduled week of posts.

Uses your Claude connectors
Works from files on your computer
Plans whole weeks, not just one post

Open Claude connectors Start for $0

Set up Claude Cowork with PostAxis

Plug PostAxis into Claude Cowork once, then talk to it like you would to whoever runs your accounts. Every click is in the full guide below.

Plug in under a minute

Step 1 of 2

Add PostAxis to Claude once

Cowork uses the connectors from your Claude account. Add PostAxis as a custom connector, sign in, and every Cowork task can use it.

PostAxis account
A connected social account
Claude Cowork installed

MCP server URL

https://postaxis.io/api/mcp

Cowork uses the same connectors as the Claude desktop app, so you only add PostAxis once.

Talk

Step 2 of 2

Then tell Claude Cowork what you need

Claude Cowork picks the PostAxis tools it needs. Scheduled posts go out on time whether or not the chat is still open.

Try asking

Which accounts can you post to?
What goes out this week?
Keep that one as a draft

Read launch-notes.md in my Documents folder and schedule a week of posts for X and LinkedIn at 10:00.

Scheduled 10 posts: one X and one LinkedIn post each weekday at 10:00, all based on the launch notes. Everything passed the rules check.

via PostAxis

Example answer · lands in your PostAxis calendar

Full setup guide for Claude Cowork

Every step from a new PostAxis account to your first scheduled post. Takes under a minute once your accounts are connected. Want ready-made workflows? Read the full Claude Cowork guide

1
Create your PostAxis account
Sign up at app.postaxis.io. Every plan starts with a 7-day free trial and includes MCP access with OAuth sign-in. Create an account
2
Connect your social accounts
Open Accounts in PostAxis and connect the networks you want to post to: Instagram, TikTok, YouTube, X, LinkedIn, Facebook, Threads or Telegram. Your agent can only post to accounts connected here, and it never sees your social media passwords. Open Accounts
3
Add the PostAxis connector in Claude
Open the Claude desktop app → Settings → Connectors → Add custom connector. Name it PostAxis and paste the URL.
Copy this
```
https://postaxis.io/api/mcp
```
4
Connect and approve
Click Connect next to PostAxis, sign in to PostAxis and click Approve.
5
Start a Cowork task
Switch to Cowork in the Claude desktop app and give it access to the folder with your notes or images, if the task needs files.
6
Ask it to plan and schedule
Describe the outcome, for example “schedule a week of posts from these notes”. Cowork shows its plan and asks before creating posts.

What can Claude Cowork do with PostAxis?

Everything PostAxis does in the dashboard that makes sense to do by asking: writing, scheduling, editing, publishing and checking your queue.

Sentences in, posts out

Describe the post in your own words. Claude Cowork turns it into posts and PostAxis handles the scheduling.

Every network you run

Instagram, TikTok, YouTube, X, LinkedIn, Facebook, Threads and Telegram, from a single message.

Checked before it’s saved

Caption length, media count, video length and format are checked for every network before anything is saved.

Weeks ahead in one go

Ask for a week or a month. Claude Cowork can dry-run up to 50 posts at once, show you the plan, then schedule it.

Your images and video

Attach images and videos from a link, or get a one-time upload link for files on your computer.

Your accounts, your call

Claude Cowork signs in as you and can only reach accounts connected in your workspace. Cut it off from Settings whenever you like.

What is Claude Cowork?

Claude Cowork is the mode in the Claude desktop app where Claude works through longer, multi-step tasks for you, with access to files and folders you choose.

It uses the same connectors as Claude. With PostAxis, a Cowork task can go from a folder of notes or images to a scheduled week of posts.

What can you ask Claude Cowork to post?

Brief it like a person: what it’s about, where it goes, when. Four requests that work well with Claude Cowork:

From your files
Folder into a week
Read the launch notes in my Documents folder and schedule a week of posts for X and LinkedIn at 10:00.
To Claude Cowork
Long task
Fill a 30-day calendar
Plan 30 days of posts for X, LinkedIn and Threads, validate them all, show me the calendar and schedule after I approve.
To Claude Cowork
Photo
Put a photo out tonight
Here’s the link to today’s product shot. Instagram and Threads at 18:00, a two-line caption, no more than three hashtags.
To Claude Cowork
Report
Review the week
Tell me which posts published this week and which failed, and reschedule the failed ones for tomorrow.
To Claude Cowork

How does Claude Cowork talk to PostAxis?

Through MCP, the Model Context Protocol: an open standard for giving AI apps tools. PostAxis runs an MCP server; Claude Cowork connects to it and gets 11 tools that work on your account, nothing more. Full MCP reference

From your message to a scheduled post

What happens between you hitting enter and the post showing up in your calendar.

You write one message: what, where, when
Claude Cowork looks up your accounts and the limits of each network you named
It drafts a version per network and sends them to PostAxis
PostAxis checks every version and saves it as scheduled, a draft or live
The post sits in your calendar, editable until it goes out

Claude Cowork + PostAxis

Server: https://postaxis.io/api/mcp
Transport: Streamable HTTP
Sign-in: OAuth 2.1

Tools Claude Cowork discovers

list_workspacesYour PostAxis workspaces
list_accountsConnected social accounts per workspace
get_platform_rulesCaption limits and media rules per network
upload_media_from_urlPull an image or video into your media library
create_upload_linkOne-time link for uploading a local file
create_postDraft, schedule or publish one post
create_posts_bulkSchedule up to 50 posts in one call
list_postsPosts by status or date range
get_postOne post with its per-network status
update_postEdit text, media or time before it goes out
delete_postRemove a draft or scheduled post

Can Claude Cowork schedule 30 days of posts at once?

Yes. Claude Cowork can send up to 50 posts in one bulk call. Ask it to validate first: PostAxis checks every post and saves nothing, so you can review the plan before it is scheduled.

Plan 30 days of posts for X and LinkedIn about our product, validate them, show me the calendar, then schedule.

Done. Here’s what I did:

Validated 30 posts, each going to X and LinkedIn, 0 problems
Showed the calendar and waited for approval
Scheduled all 30 for 10:00 each day

via PostAxis

Example conversation

Can Claude Cowork post images and videos?

Yes, media you already have. Claude Cowork can pass PostAxis a public link to an image or video, or ask PostAxis for a one-time upload link for a file on your computer. PostAxis checks size, format and count for each network.

How does Claude Cowork sign in to PostAxis?

Claude Cowork signs in to PostAxis, never to your social networks. Your Instagram, X or LinkedIn accounts stay connected to PostAxis, and you can revoke Claude Cowork’s access at any time.

Every plan✓ Used by Claude Cowork

OAuth sign-in

Claude Cowork opens the PostAxis sign-in in your browser
You log in and click Approve
It gets access to your account only, until you revoke it

Best for apps you use yourself: ChatGPT, Claude, Cursor, Codex and most others

API add-on

API key

Create a key under Settings → API keys
Send it as Authorization: Bearer KEY, or in the URL for clients that only take a URL
Revoke the key any time and access stops at once

Best for servers and automations with no browser: n8n, Grok, Manus, headless agents

If something doesn’t work

The most common problems when connecting Claude Cowork, and how to fix them.

The agent says no accounts are connected

Connect at least one social account under Accounts in PostAxis. If you use several workspaces, tell the agent which one, for example “use my Acme workspace”.

401 Unauthorized or “sign in again”

The sign-in expired or was revoked. Reconnect from your agent (it opens the PostAxis sign-in again). With an API key, check the key is still active under Settings → API keys.

A post was rejected before saving

PostAxis checks each network’s rules first: caption length, media count, video length and format. The error says what to change; ask the agent to fix it and try again.

Posts are scheduled at the wrong time

Say the timezone in your request, for example “9:00 Europe/Berlin”. Without one, the agent uses the timezone it was told or UTC.

I want to stop an agent from posting

Open Settings → API keys in PostAxis. Revoke the agent under Connected agents, or revoke its API key. It loses access immediately.

Claude Cowork and PostAxis: questions

Is Claude Cowork different from the Claude connector?

It uses the same PostAxis connector. Cowork is the mode where Claude works through longer tasks with your files, so it can prepare and schedule many posts in one go.

What is the PostAxis MCP server?

It’s a remote Model Context Protocol server at https://postaxis.io/api/mcp that gives AI agents 11 tools to list your accounts, upload media and create, schedule, edit and delete posts in PostAxis.

Which social networks are supported?

Instagram (posts, Reels, carousels), TikTok (videos and photo posts), YouTube Shorts, X, LinkedIn, Facebook Pages, Threads and Telegram channels.

How much does it cost?

MCP access with OAuth is included in every PostAxis plan, and every plan starts with a 7-day free trial. API keys need the API add-on.

What stops an agent from posting something wrong?

PostAxis checks every post against each network’s rules before saving, the agent can preview bulk plans without saving them, everything shows up in your calendar, and you can revoke an agent at any time in Settings → API keys.