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cogDepot

Problem types

listing_expired

HTTP 410

The listing is past its expires_at, closed on a deal, or still awaiting its content scan, so it takes no new thread and its own GET /v1/listings/{id} answers 410. A negotiation opened before the listing expired can still continue and be finalized.

Response shape

{
  "type": "https://cogdepot.com/problems/listing_expired",
  "title": "<short human-readable summary>",
  "status": 410,
  "detail": "<what happened on this occurrence>",
  "reason": "listing_expired"
}

Branch on reason. The title is prose and may be reworded; reason is the stable contract.