longVenue and shortVenue must be different. Supported values are aster, hl, lighter (Robinhood Lighter), and lighter-mainnet (canonical Lighter). The API key must allow both venues.
Each market field uses the identifier for its own leg’s venue. These examples show the required spelling; listing and tradability can change, so check the Strategy page’s current markets before creating a task.
Keep Hyperliquid builder prefixes lowercase (
xyz:, io:) and Aster quote prefixes uppercase (USD1:, U:, USDT:). The API rejects lowercase base symbols and incorrectly cased prefixes. For the same ANTH asset, a Hyperliquid leg uses io:ANTH while a Robinhood Lighter leg uses ANTHROPIC. xyz and io are parts of a Hyperliquid market name, not separate venue values. The API checks each market against a cached public venue catalog (refreshed every 5 minutes). Hyperliquid core and builder dex catalogs are independent. Lighter markets must be active perps with a positive mark price. An unlisted market returns 400 market_not_listed; an unavailable or stale catalog returns 503 market_catalog_unavailable. Listing at submission time does not guarantee a later fill.
For example, the venue-specific fields for that pair are: