To change the bid strategy of a Facebook campaign with Claude or ChatGPT, ask the assistant to switch the campaign to the bid strategy you want, check the preview, and confirm. PaidSync.ai updates the campaign through the Meta API. The four strategies are lowest cost without a cap, lowest cost with a bid cap, cost cap and lowest cost with a minimum ROAS.
The bid strategy tells Meta how to spend your budget to win auctions. When the budget sits on the campaign, the strategy sits there too. A single tool changes it:
update_fb_campaign updates the bid strategy along with name, status, budgets and spend cap, and previews the change first.list_fb_campaigns shows which campaigns carry a budget, and therefore a strategy, at campaign level.The list reads. update_fb_campaign changes the account.
| Tool | What it needs |
|---|---|
| update_fb_campaign | Changes the account. The campaign ID, as text, and the bid strategy to switch to. |
| list_fb_campaigns | Reads only. Nothing, it reads the active ad account. |
A strategy with a bid cap or cost cap makes each ad set ask for a bid amount. If the ad sets have none, they fail to save, so pick lowest cost without a cap unless you have a target.
These steps use Claude. PaidSync.ai also works in ChatGPT, so you can change the bid strategy of a Facebook campaign there with the same prompts.
Sign up at paidsync.ai, then connect Meta on Meta's own sign-in screen. Know the cost per result or return you are aiming for.
Add PaidSync.ai from Claude's connector directory and sign in. Ask "list my Facebook ad accounts" and choose the one where you want to change the bid strategy of a Facebook campaign.
Tell Claude your goal, for example hold cost per result under a number, and let it match one of the four strategies.
Claude runs update_fb_campaign as a dry run and shows the current strategy and the new one.
Say yes. Then check the ad sets for errors about missing bid amounts and watch results for a few days.
Ask for the campaign again and read its bid strategy. Check the ad sets for bid errors in the next hour, since a cap strategy needs a bid on each.
Every Meta tool PaidSync.ai offers is on the Meta Ads MCP server page. To change spend instead, see how to change a Facebook campaign budget with AI.
Ask Claude or ChatGPT to update the strategy through PaidSync.ai, then confirm the preview.
Lowest cost without a cap, lowest cost with a bid cap, cost cap and lowest cost with a minimum ROAS.
A bid cap or cost cap strategy needs a bid on each ad set. Without it, switch to lowest cost without a cap.
No. Meta does not allow an objective change after the campaign exists.
PaidSync.ai is free for 15 tasks a month with no card, and you can change the bid strategy of a Facebook campaign on that plan. Pro starts at $99 a month. See pricing.
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