This is how to add negative keywords in Microsoft Ads with AI: connect your Microsoft Ads account to PaidSync.ai, then ask Claude to add negative keywords to a campaign, and skip the ones already there. The preview shows which negatives are new and which already exist.
Negatives stop spend on searches you never want. The workflow checks what is already blocked:
list_ms_negative_keywords lists the negatives on a campaign or an ad group.add_ms_negative_keywords adds negatives with exact or phrase match, and sends only the ones not already there.list_ms_negative_keywords only reads your account. add_ms_negative_keywords changes it. Claude calls these to add negative keywords.
| Tool | What it does |
|---|---|
| list_ms_negative_keywords | Shows what is already blocked |
| add_ms_negative_keywords | Adds the negatives after the preview |
Microsoft accepts exact and phrase match for negatives and does not accept broad. Choose exact when a word is fine in other phrases, and phrase when any search containing it is wrong.
These steps use Claude to add negative keywords in Microsoft Ads. In the ChatGPT app PaidSync.ai is report-only for Microsoft Ads, so the change itself runs in Claude or another MCP client.
Register at paidsync.ai and connect Microsoft Ads with Microsoft's own sign-in screen. Use a Microsoft login that can reach the account where you intend to add negative keywords.
Open Claude's connector directory, add PaidSync.ai and sign in. Ask "list my Microsoft Ads accounts", then pick the account where you will add negative keywords.
List the negatives at the level you will edit.
List each term with exact or phrase match, drawn from the search query report.
Read which are new in the dry run and confirm.
List the negatives again and confirm each new term appears at the level you chose.
Use these two prompts to add negative keywords in Microsoft Ads, in this order.
list_ms_negative_keywords only reads your account, so the lookup before you add negative keywords changes nothing.add_ms_negative_keywords runs as a preview by default, so you see the change before it is applied when you add negative keywords.add_ms_negative_keywords runs to add negative keywords.add_ms_negative_keywords runs in Claude or another MCP client when you add negative keywords. Tokens are encrypted at rest.Every Microsoft Ads tool PaidSync.ai offers is on the Microsoft Ads (Bing Ads) MCP Server page, including the tools used to add negative keywords.
In Microsoft Advertising you add negatives under the keywords tab. With PaidSync.ai, give Claude the terms and approve the preview.
No. Microsoft accepts only exact and phrase match for negative keywords.
Not to add negative keywords itself. In the ChatGPT app PaidSync.ai reads and reports on Microsoft Ads but is report-only, so run the change in Claude or another MCP client. ChatGPT can still read the account first.
A connected Microsoft Ads account and the terms you want to block.
PaidSync.ai is free for 15 tasks a month with no card, enough to add negative keywords in Microsoft Ads and see the result. Pro starts at $99 a month. See pricing.
PaidSync.ai runs 630+ tools across 14 ad and analytics platforms. Connect your accounts once and use them in the AI assistant you already work in.
Get Started Free Book a Demo