Most of the crawls are empty. That's the useful part.
19,245 crawls of OpenRouter. Three quarters of them change nothing that matters. The change feed is hiding in the other quarter, if you skip the clocks.
OpenRouter has no history, so I keep one
The catalog is a now-machine. Prices move, endpoints vanish, and last Tuesday is gone. ORCA is the ledger I built because I got tired of refreshing.