Chess Coach, a chess MCP server for Claude and ChatGPT

Chess Coach is a remote chess MCP server for Claude and ChatGPT. Choose your assistant on the homepage to connect it. In Claude, open the Chess Coach listing, sign in, and Claude can find your finished Chess.com and Lichess games, review them move by move with Stockfish running on our server, and show the result on an interactive board inside the chat.

Chess Coach is available in Claude’s directory and OpenAI’s plugin directory. Open its listing, install it and sign in with your Chess Coach account.

The chess MCP server at a glance

What	Details
Server URL	https://chess-coach-246271308938.europe-west1.run.app/mcp
Transport	Remote MCP over Streamable HTTP
Sign-in	OAuth: email and password, a one-time email code, or Google
Engine	Stockfish, on our own server (Google Cloud Run, EU)
Games	Public, finished Chess.com and Lichess games, a game link or a pasted PGN
Tools	12 you can ask for, plus one the board uses by itself
Interface	An interactive board shown in the chat (an MCP App)
Price	14-day free trial with everything, then Free plan; Plus $3.99/month; Pro $7.99/month

A language model on its own is not a chess engine, which is why the engine work happens on the server. Every evaluation comes from Stockfish and every move description is computed from the rules of chess; Claude explains them instead of guessing. If you want the background, read Can Claude analyze chess games?.

How to add the Claude chess connector

Open Chess Coach in Claude’s directory and connect it:

1. Click Connect and sign in with email or Google. This creates your free Chess Coach account, with 14 days of full access. We never ask for your Chess.com or Lichess password.
2. Open a new Claude chat and enable Chess Coach.
3. Write: "Analyze my last game. I'm your_username on Chess.com."

Chess Coach remembers your username for next time. Use the same connection on web, desktop and mobile. For clients that need a manual server URL, use the URL in the table above. Setup details and troubleshooting are in the documentation.

How to connect Chess Coach with ChatGPT

1. Open Chess Coach in OpenAI’s plugin directory.
2. Click Install plugin, then Connect Chess Coach, and sign in with email or Google.
3. Start a Work chat, select @Chess Coach and ask for a review with your chess username or a completed PGN.

Both assistants use the same Chess Coach account. ChatGPT exposes 11 tools, with no purchases or subscription-management links in the plugin. Setup details and the optional manual MCP connection are in the documentation.

Tools

All tools require sign-in. None of them deletes anything: the write tools only change your own Chess Coach settings or return a Stripe link.

Tool	What it does	Type
list_games	Finds your finished games and searches your whole history by month, opponent, result, color, time control or opening.	Read-only
review_game	In-depth Stockfish review of one game, with key moments, mistake practice and the interactive board. Uses one review.	Read-only · board
show_board	Shows one or more positions on a mini board, with arrows for the move played and the better move.	Read-only · board
analyze_position	Best moves and lines for a position or a line you want to explore; explains why a move is illegal.	Read-only
opening_report	Your opening repertoire, or an opponent's, with scores and the weakest lines.	Read-only
player_report	Scores five areas from up to 30 games, recent ones or those of a period: blunders, tactics, clock, converting won positions and openings. Free trial, Plus and Pro.	Read-only
training_drills	Turns mistakes from up to 30 games, recent ones or those of a period, into puzzles. Free trial, Plus and Pro.	Read-only
my_account	Shows your plan and what you've used today.	Read-only
set_chess_username	Saves your Chess.com or Lichess username.	Write (your settings)
set_explanation_level	Saves how you want explanations: beginner (default), intermediate or advanced.	Write (your settings)
upgrade_plan	Returns a Stripe Checkout link when you ask to upgrade. Payment happens on Stripe's page.	Write (account)
manage_subscription	Returns your Stripe customer portal link to see invoices, change your card or cancel.	Write (account)
board_event	Diagnostics sent by the board itself; not meant to be called from the chat.	Read-only

The server also publishes six prompt templates: Analyze one of my games, Review my last game, Weekly training plan, Opening trainer, Drills from my mistakes and Prepare for an opponent.

The interactive board

review_game and show_board come with a board that Claude displays right in the conversation. It is built on MCP Apps, the open MCP extension that lets a server show an interactive interface inside the host. On the board you can:

• Jump to the key moments ①②③, numbered like Claude's explanation below the board.
• See arrows: red for the move you played, green for the better move.
• Follow the evaluation graph and step through every move.
• Drag pieces to try your own ideas and have Stockfish evaluate them.
• Press "Why?" to send your question about the position on screen to Claude.
• Open Practice mistakes to replay the positions where you went wrong and find the better move.

For follow-up questions, Claude can show smaller boards, several at once as a carousel. If the board doesn't appear, start a new chat and update your Claude app; Claude still explains the review in text. More on what a review contains: AI chess analysis.

Try asking

1. "Analyze my last game. I'm your_username on Chess.com."
2. "Show me my last 10 games on Lichess and let me pick one."
3. "Find my game against aleks_92 from March 2024 and review it."
4. "Here's the PGN of a game I played with black. Review it."
5. "Show me in a board the three moments where I could have played better."
6. "In the second position, what happens if I play the bishop to d4?"
7. "Let me practice the mistakes from this game."
8. "Which openings cost me the most points with black?"
9. "I play kate_plays on Lichess tomorrow. How should I prepare?"
10. "Explain it more technically, with notation and numbers."

You don't need to name tools, and Claude answers in your language (the board is in English). For a guided, coach-style experience, see the AI chess coach.

Plans and limits

Plan	Price	What you get
Free trial	$0 for the first 14 days, no card	Everything in Pro: up to 20 reviews a day, the five-area player profile and drills, for up to 30 games at once or a whole period
Free	$0	1 in-depth review a day, the board and practice, opening reports, 30 position checks a day
Plus	$3.99/month	10 reviews a day, the five-area player profile, drills from your own mistakes
Pro	$7.99/month	Unlimited reviews with fair use (up to 20 a day)

Limits reset every day at midnight UTC. Every account gets the free trial once, from its first use; when it ends you move to Free unless you choose a plan. Player reports and drills count one review per 8 games they analyze. To upgrade, ask Claude ("I want Plus"); payment happens on Stripe's secure page. Claude itself runs on your own Claude account, so Chess Coach only charges for the engine work. Full details are on the pricing section.

Privacy and fair play

• Chess Coach only receives the parameters of each tool call (a username, a game link, a position), never your conversation with Claude, your memory or your files.
• Games are read, without your credentials, from two public APIs: the Chess.com Published-Data API and the Lichess API. Only public, finished games.
• We don't sell data, show ads or train AI models with your games. Read the privacy policy.
• Chess Coach never helps with a game in progress. It also doesn't play games against you; for that question, see Can Claude play chess?.

Chess Coach is an independent product and is not affiliated with Chess.com, Lichess or Anthropic.