> ## Documentation Index
> Fetch the complete documentation index at: https://docs.interchange.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Event source tasks

> Per-operation reference for the buyer event source and log-event API

Each page below documents a single event source operation — request, parameters, response shape, and errors. Event sources are the configuration layer that registers where outcome and marketing events come from (pixels, SDKs, warehouse syncs, CRM feeds, MMPs); `log-event` is the runtime path that sends per-user events keyed to a registered source. Sync a source once, then log events through it. For the full picture, see the [Log Events guide](/v2/guides/log-events).

## Tasks

<CardGroup cols={2}>
  <Card title="List event sources" href="/v2/buyer/event-sources/tasks/list-event-sources" icon="list">
    `GET /advertisers/:advertiserId/event-sources` — registered sources for an advertiser
  </Card>

  <Card title="Sync event sources" href="/v2/buyer/event-sources/tasks/sync-event-sources" icon="arrows-rotate">
    `POST /advertisers/:advertiserId/event-sources/sync` — register or update source configs
  </Card>

  <Card title="Log event" href="/v2/buyer/event-sources/tasks/log-event" icon="circle-dot">
    `POST /advertisers/:advertiserId/log-event` — send outcome or marketing events
  </Card>
</CardGroup>