CrossPoster MCP

Draft, preview, score, schedule and publish social posts from Claude, ChatGPT, Cursor, Gemini CLI, Perplexity, Mistral Le Chat, VS Code, Cline, Windsurf, Raycast or any other MCP client.

Server URL: https://mcp.crossposter.tech/mcp (Streamable HTTP)
Sign-in: OAuth 2.1 with dynamic client registration. Your client opens a browser window on first use, you approve the permissions, and nothing is pasted anywhere. Clients without OAuth can send a CrossPoster API key as Authorization: Bearer <key> instead (Settings → API keys in the app).
Account: a CrossPoster account is required: https://app.crossposter.tech. Social accounts are connected in CrossPoster, never from chat.

This repository holds what directories and clients read: the Claude plugin manifest, the Agent Plugins package that ChatGPT and Cursor use, the Gemini CLI extension, and the install steps below. The server itself is hosted by CrossPoster; nothing here runs on your machine.

CrossPoster MCP connector

Connect

Claude Code

claude mcp add --transport http crossposter https://mcp.crossposter.tech/mcp

Or install the plugin from Anthropic's directory with /plugin once it is listed.

Claude.ai and Claude Desktop

Settings → Connectors → Add custom connector, paste the server URL, then sign in when asked.

ChatGPT

Settings → Apps & Connectors → Create (developer mode), paste the server URL, then sign in. When the CrossPoster app is listed in the directory, add it from there instead.

Cursor

Add to Cursor, or put this in ~/.cursor/mcp.json:

{
  "mcpServers": {
    "crossposter": {
      "url": "https://mcp.crossposter.tech/mcp"
    }
  }
}

Cursor discovers the OAuth endpoints from the URL.

VS Code

code --add-mcp '{"name":"crossposter","type":"http","url":"https://mcp.crossposter.tech/mcp"}'

Gemini CLI

gemini extensions install https://github.com/backhandvolley/crossposter-mcp

Or add the server to ~/.gemini/settings.json under mcpServers as { "crossposter": { "httpUrl": "https://mcp.crossposter.tech/mcp" } }. Gemini CLI discovers OAuth and registers itself.

Perplexity

Plugins → Add custom → Add MCP connector → Remote. Name it CrossPoster, paste the server URL, confirm the acknowledgement and select Add, then select the connector card to sign in. In an organisation, the same steps live under Organization settings → Connectors.

Mistral Le Chat

Settings → Connectors → Add connector → custom MCP connector, paste the server URL, then sign in.

Cline

Settings → MCP Servers → Remote Servers: name crossposter, URL https://mcp.crossposter.tech/mcp.

Windsurf

~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "crossposter": {
      "serverUrl": "https://mcp.crossposter.tech/mcp"
    }
  }
}

Any other client

Paste the server URL where the client takes a remote MCP server. A client that only speaks stdio can bridge with npx -y mcp-remote https://mcp.crossposter.tech/mcp.

Permissions

Each permission is a separate OAuth scope. You approve them on the consent screen, and a client gets only what it asked for.

Scope	Permission	What it allows
`tools.read`	Read your content	See your drafts, connected platforms, their analytics and your past posts, and score or suggest rewrites of a post's wording. Nothing is changed.
`tools.drafts.write`	Create drafts	Create new drafts, and start proposed caption edits that leave the draft itself unchanged.
`tools.content.generate`	Generate content	Write new social-media copy from a prompt, or improve, shorten or rephrase text you supply.
`tools.publish`	Publish posts	Publish drafts to your connected platforms, or schedule them to publish later.

Tools (21)

Tool	Does	Access
`allocate_draft_id`	Allocate draft ID	read-only
`check_draft_job`	Check draft job	read-only
`connect_platform`	Connect platform	read-only
`create_draft`	Create draft	writes a draft
`create_empty_draft`	Create empty draft	writes a draft
`generate_content`	Generate content	read-only
`get_platform_analytics`	Platform analytics	read-only
`improve_content`	Improve content	read-only
`improve_wording`	Improve a post's wording	read-only
`list_drafts`	List drafts	read-only
`list_platforms`	List platforms	read-only
`list_workspaces`	List workspaces	read-only
`preview_draft_image`	Preview draft image	read-only
`preview_platform`	Preview platform	read-only
`preview_post`	Preview post	read-only
`publish_post`	Publish post	publishes, asks for confirmation first
`read_draft`	Read draft	read-only
`schedule_post`	Schedule post	writes a draft
`score_x_wording`	Score an X post's wording	read-only
`search_past_content`	Search past content	read-only
`whoami`	Who am I	read-only

publish_post returns a confirmation token first and publishes only on a second call that carries it, so nothing reaches a social network without an explicit confirmation step.

Example prompts

"List my recent CrossPoster drafts and show how the newest will look."
"Write a short LinkedIn post announcing our new feature and save it as a draft."
"Score the wording of this X post and suggest a better version."
"How did my LinkedIn posts do this month?"

Support

Documentation: https://crossposter.tech/integrations/mcp
Support: https://crossposter.tech/support
Email: support@crossposter.tech
Privacy: https://crossposter.tech/privacy
Terms: https://crossposter.tech/terms

Published by Blinov Tech Ltd. The manifests in this repository are MIT-licensed; the CrossPoster service is governed by its own terms.