June 3rd, 2026
API
Audience responses now carry richer reach and signal data for developers reading them programmatically.
Audience responses now include a distinct_profile_count field reporting the number of unique resolved profiles, separate from the raw record count (which can be larger because a profile may carry multiple records). Both GET /api/v1/audiences and GET /api/v1/audiences/{id} return it, so you can report true reach without post-processing the download.
The audience sample endpoint now returns two additional per-contact fields: intent_frequency (how many times a profile appeared in the audience over the lookback window) and impression_count (ad impressions served to that profile over the same window). These are available on GET /api/v1/audiences/{id}/sample for intent and persona audiences, giving a graded signal rather than a binary match.
Two changes tighten credential handling. Review them before your next integration build.
API key authentication now validates the key and its secret together. Send the secret in the X-Api-Secret header alongside X-Api-Key. For clients with secret enforcement enabled, a request presenting a valid key without the matching secret is now rejected. If you have only been sending the key, add the secret you saved at creation time.
Application credential reads through GET /api/app/get and GET /api/app/retrieve/{app_id} no longer return the raw client secret. Credential validation now compares a hash of the secret you supply, so store the secret issued at creation time; it cannot be read back from the API.
POST /api/v1/audiences/{id}/refresh against a paused audience now returns a 409 with a structured reason, instead of reporting success without actually queuing a rebuild. Resume the audience before requesting a refresh.
GET /api/v1/audiences/{id}/download no longer return a spurious 400 when upstream data lands late for an otherwise-ready audience.GET /api/v1/audiences no longer returns 500 for projects in certain organization hierarchies.For full endpoint details, parameters, and examples, see our developer documentation.