Upload a LinkedIn Matched Audiences contact or company list for ad targeting
domain: learn.microsoft.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Apply for Matched Audiences API access via LinkedIn's interest form — this is a gated program separate from standard Marketing API/Campaign Manager access, with a response window of up to 60 days.
Once approved, create the audience segment resource that will hold the uploaded list.
Upload SHA256-hashed email addresses (or account/company identifiers) via the Streaming API for near-real-time updates, or via CSV upload for a one-time batch transfer.
Allow up to 48 hours for the initial processing of an uploaded list before it's usable for targeting; subsequent incremental adds/removes process in near real time.
Attach the resulting audience segment as a targeting facet on a campaign once it reports a matched size sufficient for delivery.
Known gotchas
Matched Audiences API access requires a separate approval process from general Marketing API access — an existing developer app does not automatically gain these endpoints.
The initial list processing window (up to 48 hours) is much longer than the near-real-time updates that follow — plan launch timing around the first upload, not later syncs.
Only SHA256-hashed identifiers are accepted for contact-based lists; unhashed uploads are rejected.
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