Look up signals by ID

Fetch up to 500 ingested signals (usage events) by ID in one request, each with the data payload submitted at ingest. Use it to resolve the signalId values on a page of credit transactions, or the signals behind one run or ticket, instead of calling GET /api/v2/signals/{id} once per signal. Signals are returned in request order; IDs that match nothing in your organization are listed under notFound rather than failing the request. This is a read-only operation: it requires the read:usage scope and is not available to customer API keys.