Create a broadcast round
Add a round to a broadcast, fed from a PGN URL, Lichess game IDs or Lichess usernames.
MCP tool lichess_write → create_broadcast_round
write Confirm
Creates the round and returns its ID and URL. The round must have one source type; with none, it can only be fed by pushing PGN. The round appears on the broadcast page for everyone who can view the broadcast. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| broadcast_id string required | string | Broadcast ID from list_broadcasts or create_broadcast. |
| name string required | string | Round name, e.g. Round 1. |
| source string required | string | single_pgn_url, multiple_pgn_urls, lichess_game_ids or lichess_usernames. Use exactly one. |
| pgn_urls string[] | string[] | PGN URL, or several, for the two PGN sources. |
| game_ids string[] | string[] | Lichess game IDs for lichess_game_ids. |
| usernames string[] | string[] | Lichess usernames for lichess_usernames. |
| starts_at string | string | ISO start time. Read in the time zone set on the broadcast. |
tools/call
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "lichess_write",
"arguments": {
"operation": "create_broadcast_round",
"arguments": {
"broadcast_id": "broadcast_8c41d2",
"name": "Jane Doe",
"source": "source"
}
}
}
}Example response
{
"content": [
{
"type": "text",
"text": "{ ... same JSON as structuredContent ... }"
}
],
"structuredContent": {
"round_id": "Kf3nQ8vD",
"broadcast_id": "Zp4tNc6h",
"name": "Round 1",
"source": "single_pgn_url",
"starts_at": "2026-10-24T10:00:00Z",
"url": "https://lichess.org/broadcast/riverside-chess-club-championship-2026/round-1/Kf3nQ8vD"
},
"isError": false
}