Postbase

Schedule social posts and threads to X, LinkedIn, Bluesky and Mastodon from your AI.

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

  • List Channels: List the social accounts (channels) connected to this Postbase workspace: id, platform (x, linkedin, bluesky, mastodon, tiktok, youtube), handle and status. Use the ids with create_post
  • Create Post: Create a draft, or schedule a post or thread, on one or more connected channels. Relative times ("in 10 minutes", "in 2 hours") can be given as `schedule_in_minutes`, which the server con
  • List Media: List files in this workspace's Postbase media library (newest first, up to 50): id, name, MIME type, size and URL. Pass the ids to create_post's `media_ids` to attach them. Files are uploa

What data it sees

Do you need an account

No: the server works without sign-in

Schedule social posts and threads to X, LinkedIn, Bluesky and Mastodon from your AI. Postbase (postbase.so) is an open-source social media scheduler: sign in with your Postbase account, no API key needed. List your channels and media library, create drafts, schedule posts, and cancel them.

How to connect

How to connect Postbase to Claude

The server address to paste into Claude settings:

https://social-media--postbase.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Postbase to ChatGPT

The server address to paste into ChatGPT settings:

https://social-media--postbase.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Postbase to Cursor

The server address to paste into Cursor settings:

https://social-media--postbase.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (5)

Raw names from tools/list. Only developers need these.

list_channelsList the social accounts (channels) connected to this Postbase workspace: id, platform (x, linkedin, bluesky, mastodon, tiktok, youtube), handle and status. Use the ids with create_post. Docs: https://docs.postbase.so/mcp/tools
create_postCreate a draft, or schedule a post or thread, on one or more connected channels. Relative times ("in 10 minutes", "in 2 hours") can be given as `schedule_in_minutes`, which the server converts using its own clock. The post appears on the user's Postbase calendar and publishes at `scheduled_at` via each network's official API. Provide `body` for a single post or `thread` for several posts; the same text goes to every channel in the call, so call once per network for different wording. Limits per post: X 280 (links count 23), Bluesky 300, Mastodon 500, LinkedIn 3,000, YouTube 5,000 (description). Threads publish as reply chains on X, Bluesky and Mastodon; on LinkedIn the extra parts become the first comment. To attach images or a video, pass `media_ids` from list_media (files the user uploaded to their Postbase media library); YouTube needs a video and `youtube.made_for_kids`. TikTok posts can only be saved as drafts here: the user schedules them in Postbase, where TikTok requires them to choose who sees the post. Omit `scheduled_at` and `schedule_in_minutes` to save a draft. Docs: https://docs.postbase.so/mcp/tools
list_mediaList files in this workspace's Postbase media library (newest first, up to 50): id, name, MIME type, size and URL. Pass the ids to create_post's `media_ids` to attach them. Files are uploaded by the user in Postbase. Docs: https://docs.postbase.so/mcp/tools
list_scheduledList posts in this workspace with their text, time and channels. Defaults to scheduled posts; pass `status` to see drafts, published or failed posts instead. Docs: https://docs.postbase.so/mcp/tools
cancel_postCancel a scheduled post before it publishes. The post goes back to being a draft, so nothing is deleted and it can be rescheduled in Postbase. Get the id from list_scheduled. Docs: https://docs.postbase.so/mcp/tools