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ActiveCampaignSchemaBreaking

Parameter 'segmentid' type changed from 'integer' to 'string' in GET /contacts

Affected surface
GET /contacts
Affected field
segmentid@query

What changed

Parameter 'segmentid' type changed from 'integer' to 'string' in GET /contacts Affected surface: GET /contacts. Root cause: parameter `segmentid@query`. Detected at Thu, 14 May 2026 00:53:58 UTC UTC.

Diff

{
  "current_value": "string",
  "parameter_in": "query",
  "parameter_name": "segmentid",
  "path": "GET /contacts",
  "previous_value": "integer"
}

Likely impact

Existing integrations relying on this surface will fail or behave incorrectly. Treat this as a release-blocker until the recommended action below is applied.

Audit serialization on both sides. Type changes break payloads silently more often than loudly — catch this in a contract test before it hits production.

Catch changes like this on every API you depend on.

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