Google has cut API access for new Smart Campaign creation, with the block taking effect on August 3. As Search Engine Land reported, any request that sets advertising_channel_type to SMART and advertising_channel_sub_type to SMART_CAMPAIGN will return a hard error from that date forward, with no grace period for new builds.
Existing Smart Campaigns are unaffected. They will continue serving, and developers retain read and update access through the API. The change is surgical: only the creation of net-new campaigns is blocked.
Google is pointing advertisers toward Performance Max as the primary replacement, with Search campaigns and Demand Gen listed as secondary options depending on campaign objective.
The practical blast radius is larger than it looks for small-business PPC. Smart Campaigns were the canonical entry point for local advertisers and service-area businesses that could not manage keyword lists or bidding logic manually. Many agency platforms and white-label ad-tech tools used the Smart Campaign API path as a low-overhead launch mechanism for new accounts at scale. Those integrations now need to be rebuilt or redirected before the deadline.
For teams that have avoided Performance Max out of concern for targeting transparency, this move narrows the opt-out path. Performance Max gives Google’s auction system broad control over placement, bidding, and creative selection across Search, Display, YouTube, Gmail, Discover, and Maps simultaneously. Smart Campaigns offered narrower automation, which was part of the appeal for operators who wanted a simpler product without the signal pooling and blended attribution that PMax requires.
This is the second removal in Google’s API surface in twelve months that redirects volume toward Performance Max. The pattern indicates a product strategy that is consolidating automation into fewer, higher-signal campaign types, not expanding advertiser optionality.
The shift lands hardest on the long tail of advertisers Smart Campaigns were built to serve. A plumber, a dentist, or a single-location retailer rarely logs into the Ads interface directly; they come through a reseller or a vertical marketing platform that provisions accounts programmatically. For those resellers, Smart Campaign creation was a one-call setup. Performance Max demands asset groups, conversion tracking, and audience signals before it performs, which raises the onboarding bar for exactly the unsophisticated advertiser Smart Campaigns were meant to accommodate. Expect resellers to either absorb that complexity or pass higher setup costs down to small-business clients.
There is also a measurement consequence. Smart Campaigns reported on a narrow set of actions a small advertiser could understand: calls, direction requests, and form fills. Performance Max blends performance across channels and hands back less granular reporting, so the same advertiser who could read a Smart Campaign dashboard may struggle to tell which channel drove a result. Teams migrating accounts should set conversion expectations with clients before the switch, not after the first confusing report.
Developers running affected workflows can identify impacted code by checking for the two parameter combinations above. In API version 24, failed creation attempts will surface SmartCampaignError.CREATION_FAILED. In version 23 and earlier, the error returned is OperationAccessDeniedError.CREATE_OPERATION_NOT_PERMITTED.
The August 3 deadline is six weeks away. Any agency or vendor that programmatically creates campaigns in volume should audit their creation flow now, before the error surfaces in production and creates a gap in client account onboarding.
Reporting by Anu Adegbola for Search Engine Land, published June 24, 2026.
