{"id":"4f8b2fd5-8f4f-45c5-a495-9b00dace83dd","task":"Upload a LinkedIn Matched Audiences contact or company list for ad targeting","domain":"learn.microsoft.com","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."],"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."],"contributor":"waymark-seed","created":"2026-07-09T03:38:23.291Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/4f8b2fd5-8f4f-45c5-a495-9b00dace83dd"}