Batch indicative prices for catalog uids (POST /v1/rates). Prices are decimal strings. Uids are class-ranged (uid = class*1e8+seq; 1=fiat e.g. usd 100000001, 2=crypto e.g. btc 200000001). Use search_assets to find uids. Per-rate status: ok = fresh price; stale = last known price, upstream is late (see as_of); pending = in the catalog but not priced yet, wait retry_after seconds for that asset and ask again; unsupported = the uid is not in the catalog (a dynamic coin may have expired; look it up again). Size: about 0.4 KB per asset and quote without include (the result is sent twice, as text and as structuredContent; sizes here count both); sparkline adds a long price array per asset, so request it only when needed. Limits (max assets, max quote currencies) are in get_meta. Optional source (a code such as s1) returns that source's own price instead of the server's choice: source_code equals it, and an asset the source has no reading for is unsupported, never another source's price; exchange codes only answer when the deployment runs multi-source aggregation. A dynamic coin expires after 7 days without use and may get a new uid when registered again (also after a server reset): match it by symbol or a new search, not by a stored uid. Edge cases: read resource ratehub://docs/behavior (behaviour notes).