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Create & Run Experiment

Creates and runs a Google Ads custom EXPERIMENT (A/B test with a traffic split) on an existing Search or Display campaign: a control arm (the original campaign) and a treatment arm (a draft copy that gets the change),…

Type
Makes changes
Credits
3
Platform
Google Ads
Approval
Preview first, applied after you approve

What it does

Creates and runs a Google Ads custom EXPERIMENT (A/B test with a traffic split) on an existing Search or Display campaign: a control arm (the original campaign) and a treatment arm (a draft copy that gets the change), such as a different landing page (final URL) or ad text on a share of traffic.

Steps (one action each): 1. create — campaign_id, name, treatment_percent (1-99, default 50), optional start_date/end_date (YYYY-MM-DD). Creates the experiment in SETUP and the treatment draft campaign. Nothing serves yet. 2. set_final_url — experiment_id, new_final_url; optional ad_group_id (an ad group id of the ORIGINAL campaign) and/or old_final_url to limit which treatment ads change. Changes the landing page of the treatment ads only. replace_text — experiment_id, find_text, replace_text; optional ad_group_id. Replaces text inside the treatment RSA headlines/descriptions. 3. schedule — experiment_id. Starts the experiment on its start date (Google requires at least one change in the treatment first). • results — experiment_id. Control vs treatment clicks, impressions, CTR, conversions, cost and a significance test for CTR and conversion rate. Read-only. • status — experiment_id. Arms, split, draft/treatment campaign and the treatment ads with their final URLs. Read-only. To end, apply the winner (promote) or delete an experiment use list_experiments (action=end|promote|remove). Writes need confirm=true; confirm=false returns a preview. The original campaign is never edited by this tool; while the experiment runs Google locks its bidding/budget/targeting.

MCP: manage_experiment

How to use it

You don't call tools by name. Write what you want in ChatGPT, Claude or another assistant connected to Opus Growth, in your own words; it picks this tool when it fits.

Because this tool changes your account, your assistant first shows a preview of exactly what will change. Nothing is applied until you say yes, and every applied change is written to your audit log.

Parameters

NameTypeRequiredDefault
customer_idstringRequired·Google Ads customer account ID to query or change. Use the numeric ID returned by list_accounts; omit separators unless this tool explicitly says otherwise.
actionstringRequired·create · set_final_url · replace_text · schedule · results · status · Requested action for the selected resource; choose one of the actions allowed by this schema.
campaign_idstringOptional·Exact campaign identifier to target. Use the ID returned by an Opus Growth list or create operation, not a display name.
experiment_idstringOptional·Exact experiment identifier to target. Use the ID returned by an Opus Growth list or create operation, not a display name.
namestringOptional·Human-readable name for the resource being created or updated.
treatment_percentintegerOptional50Treatment percent expressed as the percentage format required by this operation.
start_datestringOptional·Inclusive start date for the requested period, in the format required by this tool.
end_datestringOptional·Inclusive end date for the requested period, in the format required by this tool.
new_final_urlstringOptional·New final url URL used by manage experiment.
old_final_urlstringOptional·Old final url URL used by manage experiment.
ad_group_idstringOptional·Exact ad group identifier to target. Use the ID returned by an Opus Growth list or create operation, not a display name.
find_textstringOptional·Exact find text value for manage experiment. Supply text in the provider's required format; when it selects an existing resource, use the exact identifier returned by the relevant list or search operation.
replace_textstringOptional·Exact replace text value for manage experiment. Supply text in the provider's required format; when it selects an existing resource, use the exact identifier returned by the relevant list or search operation.
confirmbooleanOptionalfalseSafety confirmation for a state-changing operation. Leave false to preview or validate; set true only after the user explicitly approves the shown change.
Account Auditaccount_auditAccount Snapshotaccount_snapshotAdd Keywordsadd_keywordsAdd Negative Keywordadd_negative_keywordAdd PMax Imagesadd_pmax_imagesApply Recommendationapply_recommendationBudget Pacing Alertsbudget_pacing_alertsCompetitor Adscompetitor_adsConnect Business Profileconnect_business_profile