Markets and sources
market_code identifies the market being quoted.
Two different codes
market_code identifies the market being quoted. provider_code identifies where the quote was collected. Matching codes mean first-party data; different codes mean another provider reports that market's prices. Several providers can report the same market.
The API returns at most one row per market and side. A listed quote outranks a delisted quote; among those, first-party data outranks aggregators; freshness breaks the next tie. Consequently, the selected quote need not be the newest quote across all providers.
Discover coverage
Use list markets for the current catalogue and service status for collection health. A catalogue entry does not promise a quote for every item, app or side. CSCP is a synthetic valuation code, not a trading venue.
Website directory
The site's Directory groups marketplace and tool links by category. It is a browsing directory, separate from the API's data-source catalogue. A listed external tool is not necessarily a price source. Follow a card's visit link to open that service; its account and transaction rules are managed by that service.