# How to auto-post from X (Twitter) to other social networks
Author: Davis Baer
Author URL: https://www.oneupapp.io/blog/author/davis-baer
Published: 2026-09-15
URL: https://www.oneupapp.io/blog/how-to-auto-post-from-x-twitter-to-other-social-networks

Cross-posting content manually across multiple social media platforms can be a time-consuming chore. Fortunately, with the right automation setup, you can publish a post once on X (formerly Twitter) and automatically share it to your other social media accounts.

In this step-by-step guide, we’ll walk you through how to automatically cross-post from X to platforms like Instagram, Facebook, Threads, TikTok, YouTube, and more using **Grok** and **OneUp**.

## What You’ll Need Before Getting Started

1. A **OneUp** account with your target social media accounts already connected.

2. Your **OneUp API Key**.

3. Access to **Grok**.


## Step 1: Get Your OneUp API Key

1. Log into your **OneUp** account and navigate to the **Accounts** page to ensure all target social profiles are connected.

2. Click the gear dropdown menu in OneUp and select **API and MCP**.

3. Copy your unique **API key** provided on the page.


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

1. Open **Grok** and navigate to the **Plugins** section.

2. Click **New Connector** and select **Add a custom connector**.

3. Name your connector (e.g., `OneUp`).

4. For the **Server URL**, retrieve the MCP connector URL from the OneUp API documentation.

5. Paste the URL and replace the placeholding text with your actual **OneUp API key**.

6. Click **Add Connector** to finish connecting Grok to OneUp.


## Step 3: Set Up Your Automation Prompt in Grok

Once connected, you can instruct Grok on how you want your posts to sync.

- **Example Prompt:** Prompt Grok to sync your X account posts to your target Instagram account.


## Step 4: Test and Verify the Automation

1. Create and publish a test post containing an image or video on your X account.

2. In Grok, navigate to the **Automations** tab to view your active setups.

3. By default, automations check for new posts every hour, but you can click **Run Now** to trigger an immediate test.

4. Log back into **OneUp** to verify that your X post (image/video + caption) has been scheduled or posted to your target account.


## Supported Social Networks

Once this automation is live, anything you publish on X will auto-publish across your connected channels hourly. This integration supports posting from X to:

- Instagram

- Facebook

- TikTok

- YouTube

- Threads

- Bluesky

- Snapchat

- Google Business Profile

- LinkedIn

- Pinterest

- Discord


### Check this video out to see how auto-posting from X to other social networks works in action:


---
This blog is powered by Superblog. Visit https://superblog.ai to know more.
---