@hasagi/cli

A command-line interface for the League of Legends client API (LCU). Send requests, listen to WebSocket events, read credentials, and generate the LCU schema / TypeScript types — all against a running League client, with credentials discovered automatically.

Installation

npm install -g @hasagi/cli

This exposes the hasagi command. (Or run without installing via npx @hasagi/cli <command>.)

Commands

request <method> <path>

Send an HTTP request to the LCU.

hasagi request get /lol-summoner/v1/current-summoner
hasagi request post /lol-lobby/v2/lobby --body '{ "queueId": 430 }'
hasagi request get /lol-summoner/v1/summoners --query '{ "name": "Faker" }'

Option	Alias	Description
--body	-b	JSON request body
--query	-q	JSON query parameters
--out	-o	Write the response to a file (or a directory to auto-name it)

listen

Subscribe to LCU WebSocket events and print them. With neither --name nor --path, subscribes to the OnJsonApiEvent catch-all.

hasagi listen
hasagi listen --path /lol-gameflow/v1/gameflow-phase --type Update
hasagi listen --name OnJsonApiEvent_lol-champ-select_v1_session --out ./events

Option	Alias	Description
--path	-p	Filter by URI path (conflicts with --name)
--name	-n	Subscribe to a specific event name (conflicts with --path)
--type	-t	Filter by event type(s): Create, Update, Delete
--out	-o	Append events to a file (or a directory for the default file name)

credentials

Print the LCU base URL and Authorization header for the running client.

hasagi credentials

schema

Generate the LCU schema and/or TypeScript types from the running client (powered by @hasagi/schema).

# Emit the generated TypeScript types into ./src/types
hasagi schema --typescript ./src/types

# Emit the OpenAPI (swagger) document
hasagi schema --swagger ./

Option	Alias	Description
--typescript	-t	Output directory for the generated .d.ts files
--tsnamespace		Wrap the generated types in a namespace
--swagger	-s	Output directory for swagger.json
--raw	-r	Output directory for the raw/extended schema JSON
--index / --no-index		Emit (default) or skip an index.d.ts barrel re-export

Disclaimer

Hasagi is not endorsed by Riot Games and does not reflect the views or opinions of Riot Games or anyone officially involved in producing or managing Riot Games properties. Riot Games and all associated properties are trademarks or registered trademarks of Riot Games, Inc.