# How to Automatically Sync New X Posts to Your Other Social Accounts (Using Grok)
Author: Davis Baer
Author URL: https://www.oneupapp.io/blog/author/davis-baer
Published: 2026-09-15
Meta Description: How to automatically sync new X posts to your other social accounts using Grok and OneUp — the required setup for X as a source platform.
URL: https://www.oneupapp.io/blog/how-to-automatically-sync-new-x-posts-to-your-other-social-accounts-using-grok

Most of OneUp's crossposting sources — Instagram, Facebook, TikTok — connect directly inside OneUp's own Crossposting menu. X doesn't work that way. Because of how X's API is structured, syncing content _from_ X requires going through **Grok** as a connector first. Here's how to set that up for ongoing, automatic syncing.

## Why X needs a different setup

OneUp's standard Crossposting workflow builder supports Instagram, Facebook, and TikTok as source accounts directly. X isn't included in that list — instead, Grok acts as the bridge: it watches your X account for new posts and pushes them into OneUp, which then publishes them to your other connected accounts.

## What You'll Need

1. A **OneUp** account with your target destination accounts already connected
2. Your **OneUp API Key**
3. Access to **Grok**

## Step 1: Get Your OneUp API Key

1. Log into OneUp and go to the **Accounts** page to confirm your destination accounts are connected.
2. Click the gear dropdown menu and select **API and MCP**.
3. Copy your API key.

## Step 2: Connect OneUp to Grok via MCP Connector

1. Open **Grok** and go to the **Plugins** section.
2. Click **New Connector**, then **Add a custom connector**.
3. Name it (e.g., `OneUp`).
4. For the **Server URL**, grab the MCP connector URL from OneUp's API documentation.
5. Paste the URL, replacing the placeholder text with your actual API key.
6. Click **Add Connector**.

## Step 3: Set Up Your Automation Prompt

Once connected, tell Grok what you want synced — for example, prompt it to sync your X account's posts to your Instagram, Facebook, or other connected accounts.

## Step 4: Test and Verify

1. Publish a test post (with an image or video) on X.
2. In Grok, check the **Automations** tab for your active setup.
3. Automations check for new posts every hour by default — click **Run Now** to trigger an immediate test instead of waiting.
4. Confirm in OneUp that the post was scheduled or published to your destination accounts.

## What this covers going forward

Once this is running, it checks hourly and keeps working indefinitely — every new X post automatically flows to Instagram, Facebook, TikTok, YouTube, Threads, Bluesky, Snapchat, Google Business Profile, LinkedIn, Pinterest, and Discord, depending on which destinations you've set up, without you manually re-posting anything on X's side.

Ready to keep your other platforms in sync with X automatically? [Get started with OneUp](https://www.oneupapp.io/).


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