How to connect Claude to PostMCP AI (Step by Step)

Connecting Claude to PostMCP AI turns your Claude conversations into a live command center for seven major social networks: Bluesky, LinkedIn, X (Twitter), Instagram, Facebook, Threads, and YouTube Shorts.

Instead of switching browser tabs, copying and pasting copy, or logging into fragmented scheduling tools, you can simply instruct Claude: “Write a post about our latest update and publish it to Bluesky and LinkedIn with PostMCP.” Claude drafts the copy, verifies character limits, invokes PostMCP tools, and publishes live in seconds.

Before you start

• A PostMCP AI account (free to sign up at the login page with Apple, GitHub, or Google — comes with 20 free monthly posts).
• At least one connected social network (such as Bluesky, LinkedIn, or X) in your PostMCP workspace.
• A Claude account — either Claude.ai (Pro, Team, or Enterprise for web custom connectors) or Claude Desktop (100% free on macOS and Windows).

Step 1 — Sign in to PostMCP AI

Navigate to the PostMCP Sign In page. Authenticate with a single click using your Apple, GitHub, or Google account. There are no passwords to create or email confirmation delays.

Once signed in, PostMCP provisions a dedicated workspace for you, protected by AES-256 vault encryption for your credentials.

Step 2 — Connect your social accounts

From the dashboard sidebar, navigate to Accounts and click Connect New Account (or click the plus icon). A modal titled Integrate Social Channel appears with all supported platforms.

Click the + button next to your desired platform — for example, Bluesky, LinkedIn, or X / Twitter:

1. 1
   Bluesky

   Provide your Bluesky handle and an App Password generated in your Bluesky account settings. Your profile is linked in seconds.

2. 2
   LinkedIn

   Authorize via official LinkedIn OAuth. Connect either personal profiles or company pages that you manage.

3. 3
   X / Twitter

   Sign in through Twitter OAuth 2.0 to grant post and thread publishing permissions.

4. 4
   Meta (Instagram & Facebook)

   Authorize through Facebook Business Login to enable automated publishing to Instagram Business profiles and Facebook Pages.

Step 3 — Copy your unique MCP Server URL

In the PostMCP dashboard left navigation bar, click on AI Integration (under the AUTOMATE section). This tab generates ready-to-use configurations for AI assistants including Claude, ChatGPT, Cursor, Antigravity, and Claude Code.

Click on the Claude AI card. The complete 3-step setup walkthrough appears with your unique connection parameters:

Click the blue Copy URL button in Step 1. Your clipboard will hold a URL formatted like: https://mcp.postmcpai.com/mcp?apikey=pmcp_sec_••••.

Step 4 — Add the PostMCP connector in Claude.ai (Web)

If you use Claude in your web browser (claude.ai) on a Pro, Team, or Enterprise plan, you can connect PostMCP directly via custom connectors.

1. 1
   Open Settings in Claude

   In Claude.ai, click on your profile avatar in the bottom-left corner of the sidebar and select Settings.

2. 2
   Navigate to Connectors

   In the Settings modal, select the Connectors tab from the left navigation menu.

3. 3
   Add custom connector

   Click the Add dropdown in the top-right corner and choose Add custom connector (or navigate directly to claude.ai/settings/connectors?modal=add-custom-connector).

Configure each field in the Add custom connector modal as follows:

Click Add. Claude establishes a secure Server-Sent Events (SSE) connection to PostMCP’s HTTPS endpoint, negotiates schemas, and registers all 16 publishing and account tools.

Step 5 — Alternative: Configure Claude Desktop (Free on macOS & Windows)

If you are on Claude’s free plan, or prefer working in a native desktop application, you can connect PostMCP to Claude Desktop at zero cost using its built-in configuration file.

1. 1
   Open Claude Desktop Developer Settings

   In Claude Desktop, click Claude in the top menu bar (or press ⌘+, / Ctrl+,), select Settings, then click the Developer tab and choose Edit Config.

2. 2
   Paste the JSON Configuration

   Your default text editor will open claude_desktop_config.json. Paste the snippet below into the file, replacing the URL with your copied PostMCP endpoint:

{
  "mcpServers": {
    "postmcpai": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.postmcpai.com/mcp?apikey=pmcp_sec_••••••••••••"
      ]
    }
  }
}

Step 6 — Test and verify PostMCP tools in Claude

Start a new chat in Claude (either on Claude.ai or Claude Desktop). You will see the active connector badge confirming that PostMCP tools are loaded.

Before publishing live content, run a safe, zero-risk verification query that inspects your workspace without modifying any feeds:

“What social accounts do I have connected on PostMCP? List their profileIds and status.”

Claude calls get_connected_accounts and reads back your connected profiles (such as Bluesky handle or LinkedIn company page) along with their active statuses and profile IDs. This single prompt proves the entire pipeline is working end-to-end.

Step 7 — Prompt Claude to draft, preview, and publish live

Now you can instruct Claude in plain English to craft and publish posts to your social channels. Here is an example prompt requesting a high-impact LinkedIn post published via PostMCP:

“AI content for Linkedin with postmcp”

Notice the intelligent safeguards and execution steps Claude performs during this exchange:

1. 1
   Platform Preflight & Character Validation

   Claude detects that the destination is LinkedIn, composing thoughtful copy tailored to LinkedIn’s professional audience at 1,151 characters (well within LinkedIn’s 3,000-character limit).

2. 2
   Interactive Confirmation & Safety Controls

   Claude asks whether you want to edit the draft or use it as-is, and gives you the choice to show a preview with a confirmation button before anything touches your live feed.

3. 3
   Direct MCP Tool Execution & Verification

   Upon clicking the confirm button, Claude calls PostMCP’s publishing tool behind the scenes, checks authorization health, and updates the status badge to a green "Published" state.

Step 8 — Verify the live published post

Your post is published live to your social feed! Here is the exact post generated and published by Claude in this live run:

“AI won't replace people. But people using AI will replace people who don't. That line gets repeated a lot — but after a year of building with AI tools day to day, I think it undersells what's actually happening. The real shift isn't "AI vs humans." It's this: the gap between someone who knows how to direct AI and someone who doesn't is widening faster than almost any skill gap I've seen in tech. #AI #Technology #FutureOfWork #Learning”

The copy, line breaks, bullet points, and hashtags are formatted cleanly and published in real time. Claude even surfaces account re-authorization guidance automatically if your social tokens ever require a refresh.

Managing and reviewing posts in PostMCP

Every post created or scheduled by Claude appears immediately in your PostMCP dashboard. The Content Calendar gives you a complete visual overview across all connected networks.

You can also inspect the exact MCP tool call payloads in the PostMCP Composer, giving you complete visibility into parameters, token usage, and target profiles:

Prefer testing prompts without opening Claude? PostMCP also features a built-in AI Agent console right inside your dashboard:

More powerful prompts to try with Claude

With Claude connected to PostMCP, you can automate sophisticated cross-network publishing routines:

1. 1
   Multi-platform campaign fan-out

   “Draft a product launch post for LinkedIn and X. Make LinkedIn formal with 3 bullet points, and keep X punchy under 280 characters with hashtags. Confirm copy before publishing.”

2. 2
   Timezone-aware scheduling

   “Schedule a developer tip about TypeScript for next Tuesday at 9:00 AM EST on Bluesky and Threads.”

3. 3
   Health diagnostics check

   “Run get_account_health on PostMCP and report if any social tokens are close to expiration or need re-authorization.”

4. 4
   Repurpose content from notes

   “Here are our weekly release notes. Turn them into 3 distinct social posts and schedule them across Monday, Wednesday, and Friday.”

Troubleshooting common setup hurdles

1. 1
   Connectors tab is missing in Claude.ai

   Custom connectors on claude.ai require a Claude Pro, Team, or Enterprise subscription. If you are on the free tier, download Claude Desktop for macOS or Windows — it supports MCP connectors at zero cost via claude_desktop_config.json.

2. 2
   Claude Desktop does not detect PostMCP tools

   Ensure you completely quit Claude Desktop (⌘+Q on Mac or exit from system tray on Windows) and reopened it. A window close or reload does not restart the MCP process.

3. 3
   JSON syntax error in claude_desktop_config.json

   Verify that all brackets, quotes, and commas are valid. Make sure there is no trailing comma after the args array.

4. 4
   Scheduled post appears at the wrong time

   PostMCP schedules default to UTC if no timezone is provided. Always specify the timezone in your prompt, e.g., "Tuesday at 10:00 AM EST" or "15:00 UTC".

5. 5
   Token expired error during publishing

   Social networks periodically refresh OAuth tokens. If an error occurs, visit the PostMCP Accounts tab, click Reconnect next to the affected platform, and re-run your prompt.

Summary & Next Steps

Connecting Claude to PostMCP AI gives you an autonomous social media copilot directly inside your daily AI workflow. You can draft, preflight, schedule, and publish content across seven networks without ever leaving chat.

To connect other AI assistants, read our guide on how to connect ChatGPT to PostMCP AI, check out what a social media MCP server is, or explore our AI Agents hub.