This is how to build a shared negative keyword list in Microsoft Ads with AI: connect your Microsoft Ads account to PaidSync.ai, then ask Claude to create a negative keyword list and apply it to campaigns, so one list protects every campaign. A new list applies to no campaign until you apply it, and each step previews first.
A shared list keeps blocking terms in one place. Claude builds it and then applies it:
create_ms_negative_keyword_list creates a shared list, optionally with its first keywords, and refuses a name already used.add_ms_negative_keyword_list_items adds keywords to an existing list.apply_ms_negative_keyword_list applies the list to campaigns and reports each one as applied, already applied, not found or failed. It needs your confirmation.create_ms_negative_keyword_list, add_ms_negative_keyword_list_items and apply_ms_negative_keyword_list change it. Claude calls these to build a shared negative keyword list.
| Tool | What it does |
|---|---|
| create_ms_negative_keyword_list | Creates the list |
| add_ms_negative_keyword_list_items | Adds more terms |
| apply_ms_negative_keyword_list | Applies the list after you confirm |
The list does nothing on its own. Applying it is the step that blocks searches, so review the campaign list in the preview. To stop a list applying to a campaign later, use the remove tool.
These steps use Claude to build a shared negative keyword list 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.
Start at paidsync.ai, then link Microsoft Ads through Microsoft's own sign-in screen. Use a Microsoft login that can reach the account where you plan to build a shared negative keyword list.
Install PaidSync.ai from Claude's connector directory and sign in. Ask "list my Microsoft Ads accounts" and select the account to build a shared negative keyword list in.
List the shared lists and reuse one if it fits.
Create the list with your first terms and add more as you find them.
Name the campaigns, read the preview and confirm.
List the list items and the campaigns it applies to, and confirm both.
Use these two prompts to build a shared negative keyword list in Microsoft Ads, in this order.
create_ms_negative_keyword_list, add_ms_negative_keyword_list_items and apply_ms_negative_keyword_list run as a preview by default, so you see the change before it is applied when you build a shared negative keyword list.apply_ms_negative_keyword_list needs your explicit confirmation, and that applies when you build a shared negative keyword list.create_ms_negative_keyword_list, add_ms_negative_keyword_list_items and apply_ms_negative_keyword_list run to build a shared negative keyword list.create_ms_negative_keyword_list, add_ms_negative_keyword_list_items and apply_ms_negative_keyword_list run in Claude or another MCP client when you build a shared negative keyword list. 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 build a shared negative keyword list.
In Microsoft Advertising shared libraries hold these lists. With PaidSync.ai, ask Claude to create, fill and apply one.
No. A new list applies to no campaign until you apply it.
Not to build a shared negative keyword list 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 a set of blocking terms.
PaidSync.ai is free for 15 tasks a month with no card, enough to build a shared negative keyword list in Microsoft Ads and see the result. Pro starts at $99 a month. See pricing.
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