Codex Meta Ads

Meta Ads + Codex | Setup Guide

Meta Ads + Codex

Simplified Setup Guide

What This Setup Does

This setup lets Codex connect to your Meta ad account using Meta's Marketing API.

Codex can then help you:

• Pull campaign data
• Read ad performance
• Create draft campaigns and ads
• Suggest optimizations
• Update budgets or pause ads (if you allow it)

Step 1: Create a Meta Developer App

Go to developers.facebook.com and log in or create your Meta Developer account. Then:

1. Go to My Apps
2. Click Create App
3. Give your app a name
4. Select the required options
5. Create the app
6. Open the app dashboard

Step 2: Get Your Access Token

Inside Meta Developer tools

1. Go to Tools
2. Open Graph API Explorer
3. Select your app
4. Generate an access token
5. Copy the token

The important permissions for Meta Ads are

ads_read ads_management

Step 3: Get Your Ad Account ID

Go to Meta Ads Manager and find your Ad Account ID. It looks like this

act_123456789 Always include act_ before the number. Page 1

Meta Ads + Codex | Setup Guide

Step 4: Create a Project Folder

On your computer, create a folder for your Meta Ads automation files

meta-ads-codex

Step 5: Create a .env File

Inside the folder, create a file named .env and add the following

META_ACCESS_TOKEN=your_access_token_here
META_AD_ACCOUNT_ID=act_123456789
META_API_VERSION=v21.0

Replace the placeholder values with your real access token and ad account ID.

Step 6: Open the Folder in Codex

Open the Codex app, then open the meta-ads-codex folder. Codex can now work inside that folder.

Step 7: Ask Codex to Connect Meta API

In Codex, type this prompt

I have saved my Meta access token and ad account ID in the .env file. Do not print the token.

Create a Meta Marketing API connection test that

reads the .env file and lists my campaigns.

Codex will create a script that reads your .env file, connects to the Meta Marketing API, and pulls your campaign

list.

Step 8: Run the Connection Test

Ask Codex

Run the connection test and show me if Meta API is working. If everything is correct, Codex will display your campaign data.

Step 9: Ask Codex to Analyze or Create

Once connected, you can ask Codex things like

Analyze my campaigns from yesterday and find poor-performing ads. Create a draft campaign for lead generation, but keep it paused. Page 2

Meta Ads + Codex | Setup Guide

Show me ads with high spend and low results. Suggest budget changes based on performance.

IMPORTANT SAFETY RULE

Do not paste your real token directly into Codex chat. Always use the .env file. The script reads the .env file, then connects to Meta Ads. Your token stays private.

How It Works

You are not directly connecting Codex to Meta Ads Manager. The full flow is:

Codex App

-> local script -> .env file

-> Meta Marketing API

-> your ad account This keeps your credentials secure while giving Codex the ability to read and manage your Meta Ads. Page 3