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Postel

Official registry Marketing and sales

Draft, schedule and publish X (Twitter) and LinkedIn posts in your own voice.

Source code Website Documentation

What can you do with Postel?

  • It does not read your X timeline, mentions or DMs, or your LinkedIn feed or messages.
  • It does not like, reply, follow, comment or send connection requests.
  • LinkedIn posts go to personal profiles only, not company pages.
  • Images, video, documents and LinkedIn first comments are added in the Postel editor, not through MCP.
  • Research searches Postel's indexed library of X posts, not live X.

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http postel 'https://www.postel.app/api/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "postel": {
            "type": "http",
            "url": "https://www.postel.app/api/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Postel MCP server for X (Twitter) and LinkedIn
  2. Setup
  3. Tools
  4. Example prompts
  5. What it does not do
  6. Plans and limits
  7. Links
  8. License

Postel MCP server for X (Twitter) and LinkedIn

Draft, schedule and publish X (Twitter) and LinkedIn posts from Claude, Cursor and other MCP clients.

Postel is a writing and scheduling tool for people who post as themselves: founders, consultants and creators. Its hosted MCP server lets an AI assistant research high-performing X posts, draft posts and threads in your saved voice, and schedule or publish them to your X account and your personal LinkedIn profile once you approve.

This repository holds the public metadata for that server: the Claude plugin, the MCP Registry entry and setup instructions. The server itself is hosted by Postel; there is nothing to run locally.
Server URLhttps://www.postel.app/api/mcp
TransportStreamable HTTP
AuthenticationOAuth 2.1 with dynamic client registration, or an API key as a bearer token
Registry nameapp.postel/postel

Setup

Post research (search-viral-tweets) works without an account. For everything else you need a Postel account; connect your X account, your LinkedIn profile or both under Settings > Channels.

Claude Code plugin
/plugin marketplace add robinfaraj/postel-mcp
/plugin install postel@postel

Then run /mcp and sign in to Postel. The plugin adds the server and a postel-writing skill that teaches Claude the drafting and scheduling workflow.

Claude Code without the plugin
claude mcp add --transport http postel https://www.postel.app/api/mcp

Run /mcp to sign in. To use an API key instead:

claude mcp add --transport http postel https://www.postel.app/api/mcp --header "Authorization: Bearer pstl_YOUR_API_KEY"
Claude (web and desktop)

Open Customize > Connectors, click +, choose Add custom connector, enter https://www.postel.app/api/mcp and sign in to Postel when asked.

Cursor

Add this to your MCP settings (~/.cursor/mcp.json or .cursor/mcp.json in a project):

{
  "mcpServers": {
    "postel": {
      "url": "https://www.postel.app/api/mcp",
      "headers": {
        "Authorization": "Bearer pstl_YOUR_API_KEY"
      }
    }
  }
}

Create the key in Postel under Settings > API Keys. Keys start with pstl_ and are scoped to one workspace.

Other clients

Any client that supports remote MCP servers over Streamable HTTP works. Point it at the server URL above and either let it run the OAuth sign-in or send Authorization: Bearer pstl_YOUR_API_KEY.

Tools

Posts
ToolWhat it does
list-postsLists posts, with an optional status filter
get-postReturns one post by ID
create-postSaves text as a new draft
update-postEdits a draft
delete-postDeletes a post and cancels its schedule
schedule-postSchedules a draft for a future time
publish-postPublishes a draft now
Writing and research
ToolWhat it does
generate-postWrites an X post, an X thread or a LinkedIn post in your voice and saves it as a draft
refine-postSuggests a rewrite of a draft from your instructions
search-viral-tweetsFinds high-performing X posts by topic in Postel's library. No sign-in needed
Context
ToolWhat it does
list-brandsLists your brands and topics
get-brand-sourcesReturns background sources for a brand
get-x-profilesReturns your voice profiles
get-scheduleReturns your weekly posting slots and timezone
get-usageShows usage and plan limits

Example prompts

  • "Find viral posts about bootstrapping a SaaS and tell me what the best hooks have in common."
  • "Draft a LinkedIn post about the pricing change we shipped this week."
  • "Write a thread about what we learned from our last launch."
  • "Show me what is scheduled for next week."
  • "Schedule that post for Tuesday at 9am Berlin time."

What it does not do

  • It does not read your X timeline, mentions or DMs, or your LinkedIn feed or messages.
  • It does not like, reply, follow, comment or send connection requests.
  • LinkedIn posts go to personal profiles only, not company pages.
  • Images, video, documents and LinkedIn first comments are added in the Postel editor, not through MCP.
  • Research searches Postel's indexed library of X posts, not live X.

Plans and limits

  • Research needs no account. Drafting and reading posts work on any plan, and AI generation counts against your monthly quota.
  • Scheduling and publishing need a paid plan or trial. See pricing.
  • API keys are limited to 60 requests per minute.

License

The files in this repository are released under the MIT License. The Postel service is covered by its own terms.

Frequently asked questions

What is Postel?

Draft, schedule and publish X (Twitter) and LinkedIn posts in your own voice.

How do I install Postel?

It runs as a remote server. In Claude Code: claude mcp add --transport http postel 'https://www.postel.app/api/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Postel need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Postel open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Postel?

It is published by robinfaraj. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.