Whistle.day - Run Your Tournament
Run a whole sports tournament from a chat: create it, add teams, draw groups and brackets, enter results, and put a live projector screen on the wall.
What it can do
- Add Court: Add a court, pitch or table. Courts are what the schedule puts matches on and what the projector groups them by, so a tournament with none can be played but not organised: update_fixture's
- Add Entry: Add a team/participant to a tournament
- Create Display: Create a projector display screen for a published tournament
What data it sees
Do you need an account
No: the server works without sign-in
Run a whole sports tournament from a chat: create it, add teams, draw groups and brackets, enter results, and put a live projector screen on the wall.
How to connect
How to connect Whistle.day - Run Your Tournament to Claude
The server address to paste into Claude settings:
https://whistle-day.run.tools
- Open Claude (claude.ai or the desktop app).
- Go to Settings → Connectors.
- Click Add custom connector.
- Paste the server address copied below into Remote MCP server URL and click Add.
- In a chat, click + → Connectors and switch the new connector on.
Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.
Authorization
After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.
How to connect Whistle.day - Run Your Tournament to ChatGPT
The server address to paste into ChatGPT settings:
https://whistle-day.run.tools
- Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
- Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
- Open Settings → Connectors and click Create.
- Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
- Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
- In a new chat open + → Apps/Connectors and enable the connector.
OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.
Authorization
On first use ChatGPT opens the service's sign-in window. Sign in and approve access.
How to connect Whistle.day - Run Your Tournament to Cursor
The server address to paste into Cursor settings:
https://whistle-day.run.tools
Fastest: click Open in Cursor below and confirm the prompt.
Manually:
- In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
- Paste the JSON copied below into
~/.cursor/mcp.json(per project:.cursor/mcp.jsonin the repo root). - Save the file. The server appears in the MCP list; authorize it there if asked.
Authorization
If the service needs sign-in, an authorize button appears next to the server in the MCP list.
Server tool list (21)
Raw names from tools/list. Only developers need these.
| add_court | Add a court, pitch or table. Courts are what the schedule puts matches on and what the projector groups them by, so a tournament with none can be played but not organised: update_fixture's court argument has nothing to point at. |
| add_entry | Add a team/participant to a tournament |
| create_display | Create a projector display screen for a published tournament |
| create_handoff | Make a link that hands this tournament to a person. They open it, set an email and a password, and the account this session has been acting as becomes theirs. Single use, and it expires. Afterwards this session_token stops working — which is the point, so hand it over when the tournament is ready rather than when you are still building it. |
| create_stage | Create a stage in a tournament (e.g. round_robin group) |
| create_tournament | Create a tournament. The only tool that needs no session_token: it makes an account for this tournament and returns the session_token for it, which every other tool then requires. Keep that token — it is the only way back to this tournament, and it is not recoverable. |
| generate_stage | Generate pools, slots and fixtures for a stage. Use dry_run=true to preview without saving. |
| get_fixture | Get a fixture by ID with games |
| get_stage | Get a stage by ID with its pools |
| get_stage_table | Get a stage's cross-pool table: every pool's first place, then every second, then every third, ranked within each of those tiers. This is what "the best third-placed teams" is decided on, and what a stage_rank slot reads. Provisional until every pool in the stage has finished — readable throughout, but nothing is seeded from it until then. |
| get_tournament | Get a tournament by ID |
| list_courts | The courts a tournament is played on. Their ids are what update_fixture's court argument takes. |
| list_entries | List entries (participants) in a tournament |
| list_fixtures | List fixtures in a stage, optionally filtered by pool, round, or status |
| list_pools | List pools in a stage |
| list_stages | List stages in a tournament |
| list_standings | List standings for a pool |
| list_tournaments | List the tournaments this session can act on |
| publish_tournament | Publish a tournament (set status to live) so the display works |
| resolve_stage | Re-resolve a stage's fixture propagation and standings. Use after correcting scores. |
| update_fixture | Update a fixture's score and status (settle a match) |