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Marketing API v26.0 Release and Migration Summary

type: summaryconfidence: highupdated: 2026-08-25marketing_api_version: v26.0sources: 7

Key Points

Marketing API v26.0 was released July 29, 2026. The full Graph v26.0 changelog is the canonical complete source because the dedicated Marketing API version URL is not a dependable standalone source. The release blog is highlights/context, not the completeness boundary.

  1. Delivery Estimate: v26 removes daily_outcomes_curve, budget_guardrail, and estimate_dau from GET /{ad-account-id}/delivery_estimate and GET /{adset-id}/delivery_estimate. All remaining supported versions follow on October 27, 2026. There is no replacement API.
  2. WhatsApp Status: third-party callers must explicitly include wamo_whatsapp_identity_spec; omitted user_age_unknown defaults to true when Status is selected; offsite Conversion Optimization is supported for Sales, Leads, and Engagement, Landing Page Views is supported, and carousels support up to 10 cards.
  3. Advantage+ Audience for HEC-F: constrained non-broad/non-relaxed Housing, Employment, or Financial Products and Services ad-set creation must explicitly set targeting_automation.advantage_audience to 1 or 0; omission returns ADS_TARGETING__REQUIRE_EXPLICIT_ADVANTAGE_AUDIENCE_FLAG. Broad/default and relaxed setups retain defaulting, and existing-ad-set updates are unaffected. The canonical changelog names the account ad-set creation endpoint; the blog additionally describes copied ad sets and lists update/copy endpoints, a source-level wording difference preserved in the durable pages.
  4. Instagram Explore Feed: explicit Explore targeting is unavailable and errors; delivery shifts to other eligible placements.
  5. Website+App: ads reject attached creatives with applink_treatment=web_only; all Marketing API versions follow on October 27, 2026.
  6. Messenger Stories: story is silently removed from messenger_positions and absent from effective placements; historical targeting may retain it. Manual-placement clients remove it; Advantage+ Placements require no action. All versions, including unversioned calls, follow on October 27, 2026.
  7. Poll creatives: poll_spec and poll under interactive_components_spec cannot be used to create or change a creative. Existing-ad updates that do not change creative continue. Affected: POST /{ad-account-id}/adcreatives, POST /{ad-account-id}/ads, POST /{ad-id}, GET /{ad-account-id}/generatepreviews. All versions follow on October 27, 2026.
  8. Creative Shops Ads: eligible shop advertisers default to destination_spec.destination_type = WEBSITE_AND_SHOP; opt out with WEBSITE_AND_SHOP_OPT_OUT.

Separate package lane: the changelog said Meta Business SDK v26 would be published shortly after the API. As of retrieval, Python facebook-business is 26.0.0, while npm facebook-nodejs-business-sdk remains 24.0.1. This supports only package-specific claims, not “all SDKs shipped v26.”

Current out-of-cycle Access Tier: effective May 4, 2026, Ads Management Standard Access became Marketing API Access Tier; Standard/Advanced labels became Limited access/Full access; auto-approval fell from 1,500 to 500 calls in 15 days; errors use a rolling 500-request window with < 15%; screen recording was removed.

Version lanes: v24.0 remains listed until October 6, 2026. Do not apply the October 27 cross-version date to v26 changes unless the canonical source explicitly says so.

Excluded as Graph-only: Commerce Order Management, Rights Manager owner fields, legacy Graph protocol changes, and New Pages Experience Page fields/settings are not transferred into Ads behavior guidance.

Relevant Concepts

Source Metadata

  • Canonical complete release source: Meta, “Version 26.0,” released 2026-07-29; official Graph + Marketing changelog; retrieved 2026-08-25.
  • Launch context: Meta, “Introducing Graph API v26.0 and Marketing API v26.0,” Ayyad Farah and Manjari Jain, 2026-07-29; retrieved 2026-08-25.
  • Current Marketing API changelog: official current version table and Access Tier out-of-cycle section; retrieved 2026-08-25.
  • Current versions table: official Graph/Marketing version schedule; retrieved 2026-08-25.
  • Package registries: official PyPI and npm package metadata snapshots; retrieved 2026-08-25.