X (Twitter) API Configuration Guide for Stackposts (2026 Updated)

Introduction

The X API (formerly Twitter API) allows Stackposts to:

• Publish tweets

• Upload images & videos

• Read profile information

• Access followers data

• Send Direct Messages (if enabled)

This guide shows you how to correctly configure an X Developer App for Stackposts.

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Step 1: Create an X Developer Account

1. Go to:
   👉 https://developer.x.com

2. Login with your X account.

3. Open Developer Console

4. Navigate to:

   Dashboard → Apps → Create App

5. Enter your App name and create the application.

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Step 2: Generate API Keys

Click your App → Go to:

Generate:

• API Key (Consumer Key)

• API Secret Key

• Access Token

• Access Token Secret

• Bearer Token (optional but recommended)

⚠️ Important: Save these keys immediately. X will not show the full secret again.

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Step 3: Configure User Authentication Settings

Inside your App:

Click:

You will see the authentication configuration page.

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3.1 App Permissions (Required)

Select:

✅ Read and write

If you need Direct Messages support:

✅ Read, write and Direct message

For Stackposts basic publishing:

👉 Read and write is required

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3.2 Type of App (Required)

Select:

✅ Web App, Automated App or Bot

(Confidential client)

❌ Do NOT select Native App.

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3.3 App Information

Fill the following fields exactly:

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Callback URL / Redirect URL

⚠️ Important:

• Must match exactly the callback route used by Stackposts

• Must use HTTPS

• No extra slash differences

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Website URL

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Organization Name

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Organization URL

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Terms of Service URL

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Privacy Policy URL

⚠️ Required for production apps.

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Click:

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Step 4: Verify Access Level

Go to:

You should see:

✅ Elevated Access

If you only have Free or Basic access and posting fails, you may need to upgrade your X API plan.

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Step 5: Add API Keys into Stackposts

Login to your Stackposts Admin Panel.

Go to:

Fill in:

• API Key

• API Secret

• Access Token

• Access Token Secret

• Bearer Token (optional)

Click Save.

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Step 6: Test Connection

1. Go to User Dashboard.

2. Click Add Account.

3. Select X.

4. Authorize your account.

5. If redirected back successfully → Setup is correct.

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Common Problems & Solutions

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❌ Redirect URI Mismatch

Cause:
Callback URL in X does not match Stackposts callback.

Solution:
Ensure both are identical:

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❌ This application cannot authenticate more users at this time

Cause:
Free plan token limit reached.

Solution:
Upgrade X API plan or request higher access.

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❌ 403 Unauthorized When Posting

Check:

• App Permission = Read & Write

• Access Token matches app

• Elevated Access enabled

• Keys not regenerated accidentally

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❌ Cannot Add X Account in Stackposts

Check:

• User authentication enabled

• Callback URL correct

• Web App selected (not Native)

• HTTPS enabled on your domain