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ActiveCampaignSchemaAdditive

Parameter 'lookupByAcId' added to POST /contact/sync

Affected surface
POST /contact/sync
Affected field
lookupByAcId@query

What changed

Parameter 'lookupByAcId' added to POST /contact/sync Affected surface: POST /contact/sync. Root cause: parameter `lookupByAcId@query`. Detected at Sat, 22 Aug 2026 08:25:42 UTC UTC.

Diff

{
  "parameter_in": "query",
  "parameter_name": "lookupByAcId",
  "path": "POST /contact/sync"
}

Likely impact

This is an additive change. Existing integrations are unaffected; this is mostly useful if you want to take advantage of the new surface.

Review the change above against your usage. Most behavioral shifts don't require code changes, but it's worth a quick audit.

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