Engine names

In query / body (type, engine)	In responses (engine, engineSupport, availableEngines)
cex	off-chain
dex	on-chain
private	private

GET /v1/quote?type= also accepts all and comma-separated combinations (cex,dex, cex,dex,private). Default when type is omitted: cex.

Network identifiers in query/body must match GET /v1/chains → chains[].id (canonical slug, case-insensitive). Token tickers are matched case-insensitively.