To create a Facebook custom audience with Claude or ChatGPT, name the audience, pick your pixel and say which visitors to include and for how many days. PaidSync.ai previews the exact rule, then creates it. The preview shows the rule in plain words, so you can check it matches what you meant.
A website custom audience collects people who visited pages on your site, based on the Meta Pixel. You need the pixel and then the rule:
list_fb_pixels lists the pixels on the ad account and their IDs.create_fb_custom_audience creates the audience with a name, a pixel, rules and a retention period.The list reads. create_fb_custom_audience writes to the account.
| Tool | What it needs |
|---|---|
| list_fb_pixels | Reads only. Nothing, it reads the active ad account. |
| create_fb_custom_audience | Changes the account. A name. For a website audience also a pixel ID, as text, rules and a retention window in days. |
An audience only fills from the moment the pixel records visits, and small ones cannot be used for lookalikes. Check the pixel fires first.
These steps use Claude. PaidSync.ai also works in ChatGPT, so you can create a Facebook custom audience there with the same prompts.
Start at paidsync.ai, then approve the Meta connection on Meta's sign-in screen. Have the pixel installed on the pages you want to track.
Add the PaidSync.ai connector from Claude's directory. Sign in, ask Claude to list your Meta ad accounts and set the active one before you create a Facebook custom audience.
Ask Claude to list your pixels and choose the one on your site.
Say which pages or events count and how many days to remember them.
Read the rule summary in the dry run. Say yes to create.
List the audiences and check the new one. Its size grows as visitors arrive.
Every Meta tool PaidSync.ai offers is on the Meta Ads MCP server page. To check the pixel first, see how to debug Facebook Pixel fires.
Give Claude or ChatGPT the pixel, rules and retention days. PaidSync.ai shows the rule in a preview, then creates it.
A Meta Pixel on your site.
It fills from the time the pixel records visits.
Yes, with exclusion rules.
No. To create a Facebook custom audience, the free plan with 15 tasks a month and no card is enough to start, and Pro starts at $99 a month. See pricing.
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