lichess.org • Free Online Chess
Free online chess server. Play chess in a clean interface. No registration, no ads, no plugin required. Play chess with the computer, friends or random opponents.
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llms.txt
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ai-plugin.json
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OpenAPI Spec (preview)
openapi: 3.1.0
info:
version: 2.0.134
title: Lichess.org API reference
contact:
name: Lichess.org API
url: https://lichess.org/api
email: contact@lichess.org
x-logo:
url: https://lichess1.org/assets/logo/lichess-pad12.svg
license:
name: AGPL-3.0-or-later
url: https://www.gnu.org/licenses/agpl-3.0.txt
description: |
# Introduction
Welcome to the reference for the Lichess API! Lichess is free/libre,
open-source chess server powered by volunteers and