A bracket engine you can call

From a terminal

No account, no network once installed.

npx @bracketintel/cli new "Ann,Bo,Cy,Di"
npx @bracketintel/cli new -n 32 --format de
npx @bracketintel/cli new --from teams.txt --format de --randomize --seed friday --svg

From an LLM

The same binary is an MCP server. Four tools, no authorization needed — a bracket is computed from its inputs, so nothing here touches your data.

{
  "mcpServers": {
    "bracketintel": {
      "command": "npx",
      "args": ["-y", "@bracketintel/cli", "mcp"]
    }
  }
}

• explain_formathow many rounds, matches and byes a field will produce
• create_bracketbuild a bracket from a list of names
• report_resultrecord a winner and see the updated bracket
• next_matcheswhich matches are playable right now

Over HTTP

Stateless and cacheable. Identical input always returns identical output, so responses are safe to cache indefinitely.

curl -X POST https://www.bracketintel.com/api/v1/engine/generate \
  -H 'Content-Type: application/json' \
  -d '{"format":"DOUBLE_ELIM","participants":["Alice","Bob","Carol","Dave"]}'

Also /api/v1/engine/apply to report a result and /api/v1/engine/render for text, JSON or SVG. Full schema at /api/v1/openapi.json.

As a library

Pure and dependency-free, so an agent can skip tool calls and just write code against it.

import { generate, apply, renderText } from "@bracketintel/engine";

const bracket = generate({
  format: "DOUBLE_ELIM",
  participants: [{ id: "a", name: "Ann" }, { id: "b", name: "Bo" }],
});

console.log(renderText(bracket));